diff options
Diffstat (limited to 'kernel')
40 files changed, 428 insertions, 402 deletions
diff --git a/kernel/Makefile b/kernel/Makefile index 2921d90ce32..170a9213c1b 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -41,6 +41,9 @@ obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o obj-$(CONFIG_USE_GENERIC_SMP_HELPERS) += smp.o +ifneq ($(CONFIG_SMP),y) +obj-y += up.o +endif obj-$(CONFIG_SMP) += spinlock.o obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o obj-$(CONFIG_PROVE_LOCKING) += spinlock.o diff --git a/kernel/acct.c b/kernel/acct.c index d57b7cbb98b..7afa3156416 100644 --- a/kernel/acct.c +++ b/kernel/acct.c @@ -277,7 +277,7 @@ static int acct_on(char *name) * should be written. If the filename is NULL, accounting will be * shutdown. */ -asmlinkage long sys_acct(const char __user *name) +SYSCALL_DEFINE1(acct, const char __user *, name) { int error; diff --git a/kernel/async.c b/kernel/async.c index f286e9f2b73..608b32b4281 100644 --- a/kernel/async.c +++ b/kernel/async.c @@ -90,12 +90,12 @@ extern int initcall_debug; static async_cookie_t __lowest_in_progress(struct list_head *running) { struct async_entry *entry; - if (!list_empty(&async_pending)) { - entry = list_first_entry(&async_pending, + if (!list_empty(running)) { + entry = list_first_entry(running, struct async_entry, list); return entry->cookie; - } else if (!list_empty(running)) { - entry = list_first_entry(running, + } else if (!list_empty(&async_pending)) { + entry = list_first_entry(&async_pending, struct async_entry, list); return entry->cookie; } else { @@ -104,6 +104,17 @@ static async_cookie_t __lowest_in_progress(struct list_head *running) } } + +static async_cookie_t lowest_in_progress(struct list_head *running) +{ + unsigned long flags; + async_cookie_t ret; + + spin_lock_irqsave(&async_lock, flags); + ret = __lowest_in_progress(running); + spin_unlock_irqrestore(&async_lock, flags); + return ret; +} /* * pick the first pending entry and run it */ @@ -229,7 +240,7 @@ void async_synchronize_cookie_special(async_cookie_t cookie, struct list_head *r starttime = ktime_get(); } - wait_event(async_done, __lowest_in_progress(running) >= cookie); + wait_event(async_done, lowest_in_progress(running) >= cookie); if (initcall_debug && system_state == SYSTEM_BOOTING) { endtime = ktime_get(); diff --git a/kernel/capability.c b/kernel/capability.c index 688926e496b..4e17041963f 100644 --- a/kernel/capability.c +++ b/kernel/capability.c @@ -161,7 +161,7 @@ static inline int cap_get_target_pid(pid_t pid, kernel_cap_t *pEp, * * Returns 0 on success and < 0 on error. */ -asmlinkage long sys_capget(cap_user_header_t header, cap_user_data_t dataptr) +SYSCALL_DEFINE2(capget, cap_user_header_t, header, cap_user_data_t, dataptr) { int ret = 0; pid_t pid; @@ -235,7 +235,7 @@ asmlinkage long sys_capget(cap_user_header_t header, cap_user_data_t dataptr) * * Returns 0 on success and < 0 on error. */ -asmlinkage long sys_capset(cap_user_header_t header, const cap_user_data_t data) +SYSCALL_DEFINE2(capset, cap_user_header_t, header, const cap_user_data_t, data) { struct __user_cap_data_struct kdata[_KERNEL_CAPABILITY_U32S]; unsigned i, tocopy; diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 647c77a88fc..a85678865c5 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -568,7 +568,7 @@ update_domain_attr_tree(struct sched_domain_attr *dattr, struct cpuset *c) * load balancing domains (sched domains) as specified by that partial * partition. * - * See "What is sched_load_balance" in Documentation/cpusets.txt + * See "What is sched_load_balance" in Documentation/cgroups/cpusets.txt * for a background explanation of this. * * Does not return errors, on the theory that the callers of this diff --git a/kernel/dma-coherent.c b/kernel/dma-coherent.c index 038707404b7..962a3b574f2 100644 --- a/kernel/dma-coherent.c +++ b/kernel/dma-coherent.c @@ -98,7 +98,7 @@ EXPORT_SYMBOL(dma_mark_declared_memory_occupied); * @size: size of requested memory area * @dma_handle: This will be filled with the correct dma handle * @ret: This pointer will be filled with the virtual address - * to allocated area. + * to allocated area. * * This function should be only called from per-arch dma_alloc_coherent() * to support allocation from per-device coherent memory pools. @@ -118,31 +118,32 @@ int dma_alloc_from_coherent(struct device *dev, ssize_t size, mem = dev->dma_mem; if (!mem) return 0; - if (unlikely(size > mem->size)) - return 0; + + *ret = NULL; + + if (unlikely(size > (mem->size << PAGE_SHIFT))) + goto err; pageno = bitmap_find_free_region(mem->bitmap, mem->size, order); - if (pageno >= 0) { - /* - * Memory was found in the per-device arena. - */ - *dma_handle = mem->device_base + (pageno << PAGE_SHIFT); - *ret = mem->virt_base + (pageno << PAGE_SHIFT); - memset(*ret, 0, size); - } else if (mem->flags & DMA_MEMORY_EXCLUSIVE) { - /* - * The per-device arena is exhausted and we are not - * permitted to fall back to generic memory. - */ - *ret = NULL; - } else { - /* - * The per-device arena is exhausted and we are - * permitted to fall back to generic memory. - */ - return 0; - } + if (unlikely(pageno < 0)) + goto err; + + /* + * Memory was found in the per-device area. + */ + *dma_handle = mem->device_base + (pageno << PAGE_SHIFT); + *ret = mem->virt_base + (pageno << PAGE_SHIFT); + memset(*ret, 0, size); + return 1; + +err: + /* + * In the case where the allocation can not be satisfied from the + * per-device area, try to fall back to generic memory if the + * constraints allow it. + */ + return mem->flags & DMA_MEMORY_EXCLUSIVE; } EXPORT_SYMBOL(dma_alloc_from_coherent); diff --git a/kernel/exec_domain.c b/kernel/exec_domain.c index 0511716e942..667c841c295 100644 --- a/kernel/exec_domain.c +++ b/kernel/exec_domain.c @@ -209,8 +209,7 @@ static int __init proc_execdomains_init(void) module_init(proc_execdomains_init); #endif -asmlinkage long -sys_personality(u_long personality) +SYSCALL_DEFINE1(personality, u_long, personality) { u_long old = current->personality; diff --git a/kernel/exit.c b/kernel/exit.c index c7740fa3252..f80dec3f187 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -1141,7 +1141,7 @@ NORET_TYPE void complete_and_exit(struct completion *comp, long code) EXPORT_SYMBOL(complete_and_exit); -asmlinkage long sys_exit(int error_code) +SYSCALL_DEFINE1(exit, int, error_code) { do_exit((error_code&0xff)<<8); } @@ -1182,9 +1182,11 @@ do_group_exit(int exit_code) * wait4()-ing process will get the correct exit code - even if this * thread is not the thread group leader. */ -asmlinkage void sys_exit_group(int error_code) +SYSCALL_DEFINE1(exit_group, int, error_code) { do_group_exit((error_code & 0xff) << 8); + /* NOTREACHED */ + return 0; } static struct pid *task_pid_type(struct task_struct *task, enum pid_type type) @@ -1752,9 +1754,8 @@ end: return retval; } -asmlinkage long sys_waitid(int which, pid_t upid, - struct siginfo __user *infop, int options, - struct rusage __user *ru) +SYSCALL_DEFINE5(waitid, int, which, pid_t, upid, struct siginfo __user *, + infop, int, options, struct rusage __user *, ru) { struct pid *pid = NULL; enum pid_type type; @@ -1793,8 +1794,8 @@ asmlinkage long sys_waitid(int which, pid_t upid, return ret; } -asmlinkage long sys_wait4(pid_t upid, int __user *stat_addr, - int options, struct rusage __user *ru) +SYSCALL_DEFINE4(wait4, pid_t, upid, int __user *, stat_addr, + int, options, struct rusage __user *, ru) { struct pid *pid = NULL; enum pid_type type; @@ -1831,7 +1832,7 @@ asmlinkage long sys_wait4(pid_t upid, int __user *stat_addr, * sys_waitpid() remains for compatibility. waitpid() should be * implemented by calling sys_wait4() from libc.a. */ -asmlinkage long sys_waitpid(pid_t pid, int __user *stat_addr, int options) +SYSCALL_DEFINE3(waitpid, pid_t, pid, int __user *, stat_addr, int, options) { return sys_wait4(pid, stat_addr, options, NULL); } diff --git a/kernel/fork.c b/kernel/fork.c index 1d68f1255dd..242a706e772 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -817,17 +817,17 @@ static void posix_cpu_timers_init_group(struct signal_struct *sig) static int copy_signal(unsigned long clone_flags, struct task_struct *tsk) { struct signal_struct *sig; - int ret; if (clone_flags & CLONE_THREAD) { - ret = thread_group_cputime_clone_thread(current); - if (likely(!ret)) { - atomic_inc(¤t->signal->count); - atomic_inc(¤t->signal->live); - } - return ret; + atomic_inc(¤t->signal->count); + atomic_inc(¤t->signal->live); + return 0; } sig = kmem_cache_alloc(signal_cachep, GFP_KERNEL); + + if (sig) + posix_cpu_timers_init_group(sig); + tsk->signal = sig; if (!sig) return -ENOMEM; @@ -864,8 +864,6 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk) memcpy(sig->rlim, current->signal->rlim, sizeof sig->rlim); task_unlock(current->group_leader); - posix_cpu_timers_init_group(sig); - acct_init_pacct(&sig->pacct); tty_audit_fork(sig); @@ -901,7 +899,7 @@ static void copy_flags(unsigned long clone_flags, struct task_struct *p) clear_freeze_flag(p); } -asmlinkage long sys_set_tid_address(int __user *tidptr) +SYSCALL_DEFINE1(set_tid_address, int __user *, tidptr) { current->clear_child_tid = tidptr; @@ -1603,7 +1601,7 @@ static int unshare_fd(unsigned long unshare_flags, struct files_struct **new_fdp * constructed. Here we are modifying the current, active, * task_struct. */ -asmlinkage long sys_unshare(unsigned long unshare_flags) +SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags) { int err = 0; struct fs_struct *fs, *new_fs = NULL; diff --git a/kernel/futex.c b/kernel/futex.c index 002aa189eb0..f89d373a9c6 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -1733,9 +1733,8 @@ pi_faulted: * @head: pointer to the list-head * @len: length of the list-head, as userspace expects */ -asmlinkage long -sys_set_robust_list(struct robust_list_head __user *head, - size_t len) +SYSCALL_DEFINE2(set_robust_list, struct robust_list_head __user *, head, + size_t, len) { if (!futex_cmpxchg_enabled) return -ENOSYS; @@ -1756,9 +1755,9 @@ sys_set_robust_list(struct robust_list_head __user *head, * @head_ptr: pointer to a list-head pointer, the kernel fills it in * @len_ptr: pointer to a length field, the kernel fills in the header size */ -asmlinkage long -sys_get_robust_list(int pid, struct robust_list_head __user * __user *head_ptr, - size_t __user *len_ptr) +SYSCALL_DEFINE3(get_robust_list, int, pid, + struct robust_list_head __user * __user *, head_ptr, + size_t __user *, len_ptr) { struct robust_list_head __user *head; unsigned long ret; @@ -1978,9 +1977,9 @@ long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout, } -asmlinkage long sys_futex(u32 __user *uaddr, int op, u32 val, - struct timespec __user *utime, u32 __user *uaddr2, - u32 val3) +SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val, + struct timespec __user *, utime, u32 __user *, uaddr2, + u32, val3) { struct timespec ts; ktime_t t, *tp = NULL; diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 1455b7651b6..f33afb0407b 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -614,7 +614,9 @@ void clock_was_set(void) */ void hres_timers_resume(void) { - /* Retrigger the CPU local events: */ + WARN_ONCE(!irqs_disabled(), + KERN_INFO "hres_timers_resume() called with IRQs enabled!"); + retrigger_next_event(NULL); } @@ -1467,8 +1469,8 @@ out: return ret; } -asmlinkage long -sys_nanosleep(struct timespec __user *rqtp, struct timespec __user *rmtp) +SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, + struct timespec __user *, rmtp) { struct timespec tu; diff --git a/kernel/itimer.c b/kernel/itimer.c index db7c358b9a0..6a5fe93dd8b 100644 --- a/kernel/itimer.c +++ b/kernel/itimer.c @@ -100,7 +100,7 @@ int do_getitimer(int which, struct itimerval *value) return 0; } -asmlinkage long sys_getitimer(int which, struct itimerval __user *value) +SYSCALL_DEFINE2(getitimer, int, which, struct itimerval __user *, value) { int error = -EFAULT; struct itimerval get_buffer; @@ -260,9 +260,8 @@ unsigned int alarm_setitimer(unsigned int seconds) return it_old.it_value.tv_sec; } -asmlinkage long sys_setitimer(int which, - struct itimerval __user *value, - struct itimerval __user *ovalue) +SYSCALL_DEFINE3(setitimer, int, which, struct itimerval __user *, value, + struct itimerval __user *, ovalue) { struct itimerval set_buffer, get_buffer; int error; diff --git a/kernel/kexec.c b/kernel/kexec.c index 3fb855ad6aa..8a6d7b08864 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -934,9 +934,8 @@ struct kimage *kexec_crash_image; static DEFINE_MUTEX(kexec_mutex); -asmlinkage long sys_kexec_load(unsigned long entry, unsigned long nr_segments, - struct kexec_segment __user *segments, - unsigned long flags) +SYSCALL_DEFINE4(kexec_load, unsigned long, entry, unsigned long, nr_segments, + struct kexec_segment __user *, segments, unsigned long, flags) { struct kimage **dest_image, *image; int result; diff --git a/kernel/kprobes.c b/kernel/kprobes.c index 1b9cbdc0127..7ba8cd9845c 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -123,7 +123,7 @@ static int collect_garbage_slots(void); static int __kprobes check_safety(void) { int ret = 0; -#if defined(CONFIG_PREEMPT) && defined(CONFIG_PM) +#if defined(CONFIG_PREEMPT) && defined(CONFIG_FREEZER) ret = freeze_processes(); if (ret == 0) { struct task_struct *p, *q; diff --git a/kernel/module.c b/kernel/module.c index c9332c90d5a..e8b51d41dd7 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -743,8 +743,8 @@ static void wait_for_zero_refcount(struct module *mod) mutex_lock(&module_mutex); } -asmlinkage long -sys_delete_module(const char __user *name_user, unsigned int flags) +SYSCALL_DEFINE2(delete_module, const char __user *, name_user, + unsigned int, flags) { struct module *mod; char name[MODULE_NAME_LEN]; @@ -2296,10 +2296,8 @@ static noinline struct module *load_module(void __user *umod, } /* This is where the real work happens */ -asmlinkage long -sys_init_module(void __user *umod, - unsigned long len, - const char __user *uargs) +SYSCALL_DEFINE3(init_module, void __user *, umod, + unsigned long, len, const char __user *, uargs) { struct module *mod; int ret = 0; diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c index 157de3a4783..fa07da94d7b 100644 --- a/kernel/posix-cpu-timers.c +++ b/kernel/posix-cpu-timers.c @@ -10,76 +10,6 @@ #include <linux/kernel_stat.h> /* - * Allocate the thread_group_cputime structure appropriately and fill in the - * current values of the fields. Called from copy_signal() via - * thread_group_cputime_clone_thread() when adding a second or subsequent - * thread to a thread group. Assumes interrupts are enabled when called. - */ -int thread_group_cputime_alloc(struct task_struct *tsk) -{ - struct signal_struct *sig = tsk->signal; - struct task_cputime *cputime; - - /* - * If we have multiple threads and we don't already have a - * per-CPU task_cputime struct (checked in the caller), allocate - * one and fill it in with the times accumulated so far. We may - * race with another thread so recheck after we pick up the sighand - * lock. - */ - cputime = alloc_percpu(struct task_cputime); - if (cputime == NULL) - return -ENOMEM; - spin_lock_irq(&tsk->sighand->siglock); - if (sig->cputime.totals) { - spin_unlock_irq(&tsk->sighand->siglock); - free_percpu(cputime); - return 0; - } - sig->cputime.totals = cputime; - cputime = per_cpu_ptr(sig->cputime.totals, smp_processor_id()); - cputime->utime = tsk->utime; - cputime->stime = tsk->stime; - cputime->sum_exec_runtime = tsk->se.sum_exec_runtime; - spin_unlock_irq(&tsk->sighand->siglock); - return 0; -} - -/** - * thread_group_cputime - Sum the thread group time fields across all CPUs. - * - * @tsk: The task we use to identify the thread group. - * @times: task_cputime structure in which we return the summed fields. - * - * Walk the list of CPUs to sum the per-CPU time fields in the thread group - * time structure. - */ -void thread_group_cputime( - struct task_struct *tsk, - struct task_cputime *times) -{ - struct task_cputime *totals, *tot; - int i; - - totals = tsk->signal->cputime.totals; - if (!totals) { - times->utime = tsk->utime; - times->stime = tsk->stime; - times->sum_exec_runtime = tsk->se.sum_exec_runtime; - return; - } - - times->stime = times->utime = cputime_zero; - times->sum_exec_runtime = 0; - for_each_possible_cpu(i) { - tot = per_cpu_ptr(totals, i); - times->utime = cputime_add(times->utime, tot->utime); - times->stime = cputime_add(times->stime, tot->stime); - times->sum_exec_runtime += tot->sum_exec_runtime; - } -} - -/* * Called after updating RLIMIT_CPU to set timer expiration if necessary. */ void update_rlimit_cpu(unsigned long rlim_new) diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c index 887c63787de..052ec4d195c 100644 --- a/kernel/posix-timers.c +++ b/kernel/posix-timers.c @@ -477,10 +477,9 @@ static void release_posix_timer(struct k_itimer *tmr, int it_id_set) /* Create a POSIX.1b interval timer. */ -asmlinkage long -sys_timer_create(const clockid_t which_clock, - struct sigevent __user *timer_event_spec, - timer_t __user * created_timer_id) +SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock, + struct sigevent __user *, timer_event_spec, + timer_t __user *, created_timer_id) { struct k_itimer *new_timer; int error, new_timer_id; @@ -661,8 +660,8 @@ common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting) } /* Get the time remaining on a POSIX.1b interval timer. */ -asmlinkage long -sys_timer_gettime(timer_t timer_id, struct itimerspec __user *setting) +SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, + struct itimerspec __user *, setting) { struct k_itimer *timr; struct itimerspec cur_setting; @@ -691,8 +690,7 @@ sys_timer_gettime(timer_t timer_id, struct itimerspec __user *setting) * the call back to do_schedule_next_timer(). So all we need to do is * to pick up the frozen overrun. */ -asmlinkage long -sys_timer_getoverrun(timer_t timer_id) +SYSCALL_DEFINE1(timer_getoverrun, timer_t, timer_id) { struct k_itimer *timr; int overrun; @@ -760,10 +758,9 @@ common_timer_set(struct k_itimer *timr, int flags, } /* Set a POSIX.1b interval timer */ -asmlinkage long -sys_timer_settime(timer_t timer_id, int flags, - const struct itimerspec __user *new_setting, - struct itimerspec __user *old_setting) +SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, + const struct itimerspec __user *, new_setting, + struct itimerspec __user *, old_setting) { struct k_itimer *timr; struct itimerspec new_spec, old_spec; @@ -816,8 +813,7 @@ static inline int timer_delete_hook(struct k_itimer *timer) } /* Delete a POSIX.1b interval timer. */ -asmlinkage long -sys_timer_delete(timer_t timer_id) +SYSCALL_DEFINE1(timer_delete, timer_t, timer_id) { struct k_itimer *timer; unsigned long flags; @@ -903,8 +899,8 @@ int do_posix_clock_nonanosleep(const clockid_t clock, int flags, } EXPORT_SYMBOL_GPL(do_posix_clock_nonanosleep); -asmlinkage long sys_clock_settime(const clockid_t which_clock, - const struct timespec __user *tp) +SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, + const struct timespec __user *, tp) { struct timespec new_tp; @@ -916,8 +912,8 @@ asmlinkage long sys_clock_settime(const clockid_t which_clock, return CLOCK_DISPATCH(which_clock, clock_set, (which_clock, &new_tp)); } -asmlinkage long -sys_clock_gettime(const clockid_t which_clock, struct timespec __user *tp) +SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, + struct timespec __user *,tp) { struct timespec kernel_tp; int error; @@ -933,8 +929,8 @@ sys_clock_gettime(const clockid_t which_clock, struct timespec __user *tp) } -asmlinkage long -sys_clock_getres(const clockid_t which_clock, struct timespec __user *tp) +SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, + struct timespec __user *, tp) { struct timespec rtn_tp; int error; @@ -963,10 +959,9 @@ static int common_nsleep(const clockid_t which_clock, int flags, which_clock); } -asmlinkage long -sys_clock_nanosleep(const clockid_t which_clock, int flags, - const struct timespec __user *rqtp, - struct timespec __user *rmtp) +SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, + const struct timespec __user *, rqtp, + struct timespec __user *, rmtp) { struct timespec t; diff --git a/kernel/power/Makefile b/kernel/power/Makefile index 597823b5b70..d7a10167a25 100644 --- a/kernel/power/Makefile +++ b/kernel/power/Makefile @@ -4,7 +4,8 @@ EXTRA_CFLAGS += -DDEBUG endif obj-y := main.o -obj-$(CONFIG_PM_SLEEP) += process.o console.o +obj-$(CONFIG_PM_SLEEP) += console.o +obj-$(CONFIG_FREEZER) += process.o obj-$(CONFIG_HIBERNATION) += swsusp.o disk.o snapshot.o swap.o user.o obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o diff --git a/kernel/printk.c b/kernel/printk.c index 7015733793e..69188f226a9 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -382,7 +382,7 @@ out: return error; } -asmlinkage long sys_syslog(int type, char __user *buf, int len) +SYSCALL_DEFINE3(syslog, int, type, char __user *, buf, int, len) { return do_syslog(type, buf, len); } @@ -742,11 +742,6 @@ EXPORT_SYMBOL(vprintk); #else -asmlinkage long sys_syslog(int type, char __user *buf, int len) -{ - return -ENOSYS; -} - static void call_console_drivers(unsigned start, unsigned end) { } diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 29dc700e198..c9cf48b21f0 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -574,7 +574,7 @@ struct task_struct *ptrace_get_task_struct(pid_t pid) #define arch_ptrace_attach(child) do { } while (0) #endif -asmlinkage long sys_ptrace(long request, long pid, long addr, long data) +SYSCALL_DEFINE4(ptrace, long, request, long, pid, long, addr, long, data) { struct task_struct *child; long ret; diff --git a/kernel/rcuclassic.c b/kernel/rcuclassic.c index 490934fc7ac..bd5a9003497 100644 --- a/kernel/rcuclassic.c +++ b/kernel/rcuclassic.c @@ -716,7 +716,7 @@ void rcu_check_callbacks(int cpu, int user) raise_rcu_softirq(); } -static void rcu_init_percpu_data(int cpu, struct rcu_ctrlblk *rcp, +static void __cpuinit rcu_init_percpu_data(int cpu, struct rcu_ctrlblk *rcp, struct rcu_data *rdp) { unsigned long flags; diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c index 1cff28db56b..7c4142a79f0 100644 --- a/kernel/rcutorture.c +++ b/kernel/rcutorture.c @@ -136,29 +136,47 @@ static int stutter_pause_test = 0; #endif int rcutorture_runnable = RCUTORTURE_RUNNABLE_INIT; -#define FULLSTOP_SHUTDOWN 1 /* Bail due to system shutdown/panic. */ -#define FULLSTOP_CLEANUP 2 /* Orderly shutdown. */ -static int fullstop; /* stop generating callbacks at test end. */ -DEFINE_MUTEX(fullstop_mutex); /* protect fullstop transitions and */ - /* spawning of kthreads. */ +/* Mediate rmmod and system shutdown. Concurrent rmmod & shutdown illegal! */ + +#define FULLSTOP_DONTSTOP 0 /* Normal operation. */ +#define FULLSTOP_SHUTDOWN 1 /* System shutdown with rcutorture running. */ +#define FULLSTOP_RMMOD 2 /* Normal rmmod of rcutorture. */ +static int fullstop = FULLSTOP_RMMOD; +DEFINE_MUTEX(fullstop_mutex); /* Protect fullstop transitions and spawning */ + /* of kthreads. */ /* - * Detect and respond to a signal-based shutdown. + * Detect and respond to a system shutdown. */ static int rcutorture_shutdown_notify(struct notifier_block *unused1, unsigned long unused2, void *unused3) { - if (fullstop) - return NOTIFY_DONE; mutex_lock(&fullstop_mutex); - if (!fullstop) + if (fullstop == FULLSTOP_DONTSTOP) fullstop = FULLSTOP_SHUTDOWN; + else + printk(KERN_WARNING /* but going down anyway, so... */ + "Concurrent 'rmmod rcutorture' and shutdown illegal!\n"); mutex_unlock(&fullstop_mutex); return NOTIFY_DONE; } /* + * Absorb kthreads into a kernel function that won't return, so that + * they won't ever access module text or data again. + */ +static void rcutorture_shutdown_absorb(char *title) +{ + if (ACCESS_ONCE(fullstop) == FULLSTOP_SHUTDOWN) { + printk(KERN_NOTICE + "rcutorture thread %s parking due to system shutdown\n", + title); + schedule_timeout_uninterruptible(MAX_SCHEDULE_TIMEOUT); + } +} + +/* * Allocate an element from the rcu_tortures pool. */ static struct rcu_torture * @@ -219,13 +237,14 @@ rcu_random(struct rcu_random_state *rrsp) } static void -rcu_stutter_wait(void) +rcu_stutter_wait(char *title) { - while ((stutter_pause_test || !rcutorture_runnable) && !fullstop) { + while (stutter_pause_test || !rcutorture_runnable) { if (rcutorture_runnable) schedule_timeout_interruptible(1); else schedule_timeout_interruptible(round_jiffies_relative(HZ)); + rcutorture_shutdown_absorb(title); } } @@ -287,7 +306,7 @@ rcu_torture_cb(struct rcu_head *p) int i; struct rcu_torture *rp = container_of(p, struct rcu_torture, rtort_rcu); - if (fullstop) { + if (fullstop != FULLSTOP_DONTSTOP) { /* Test is ending, just drop callbacks on the floor. */ /* The next initialization will pick up the pieces. */ return; @@ -619,10 +638,11 @@ rcu_torture_writer(void *arg) } rcu_torture_current_version++; oldbatch = cur_ops->completed(); - rcu_stutter_wait(); - } while (!kthread_should_stop() && !fullstop); + rcu_stutter_wait("rcu_torture_writer"); + } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); VERBOSE_PRINTK_STRING("rcu_torture_writer task stopping"); - while (!kthread_should_stop() && fullstop != FULLSTOP_SHUTDOWN) + rcutorture_shutdown_absorb("rcu_torture_writer"); + while (!kthread_should_stop()) schedule_timeout_uninterruptible(1); return 0; } @@ -643,11 +663,12 @@ rcu_torture_fakewriter(void *arg) schedule_timeout_uninterruptible(1 + rcu_random(&rand)%10); udelay(rcu_random(&rand) & 0x3ff); cur_ops->sync(); - rcu_stutter_wait(); - } while (!kthread_should_stop() && !fullstop); + rcu_stutter_wait("rcu_torture_fakewriter"); + } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); VERBOSE_PRINTK_STRING("rcu_torture_fakewriter task stopping"); - while (!kthread_should_stop() && fullstop != FULLSTOP_SHUTDOWN) + rcutorture_shutdown_absorb("rcu_torture_fakewriter"); + while (!kthread_should_stop()) schedule_timeout_uninterruptible(1); return 0; } @@ -752,12 +773,13 @@ rcu_torture_reader(void *arg) preempt_enable(); cur_ops->readunlock(idx); schedule(); - rcu_stutter_wait(); - } while (!kthread_should_stop() && !fullstop); + rcu_stutter_wait("rcu_torture_reader"); + } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); VERBOSE_PRINTK_STRING("rcu_torture_reader task stopping"); + rcutorture_shutdown_absorb("rcu_torture_reader"); if (irqreader && cur_ops->irqcapable) del_timer_sync(&t); - while (!kthread_should_stop() && fullstop != FULLSTOP_SHUTDOWN) + while (!kthread_should_stop()) schedule_timeout_uninterruptible(1); return 0; } @@ -854,7 +876,8 @@ rcu_torture_stats(void *arg) do { schedule_timeout_interruptible(stat_interval * HZ); rcu_torture_stats_print(); - } while (!kthread_should_stop() && !fullstop); + rcutorture_shutdown_absorb("rcu_torture_stats"); + } while (!kthread_should_stop()); VERBOSE_PRINTK_STRING("rcu_torture_stats task stopping"); return 0; } @@ -866,52 +889,49 @@ static int rcu_idle_cpu; /* Force all torture tasks off this CPU */ */ static void rcu_torture_shuffle_tasks(void) { - cpumask_var_t tmp_mask; + cpumask_t tmp_mask; int i; - if (!alloc_cpumask_var(&tmp_mask, GFP_KERNEL)) - BUG(); - - cpumask_setall(tmp_mask); + cpus_setall(tmp_mask); get_online_cpus(); /* No point in shuffling if there is only one online CPU (ex: UP) */ - if (num_online_cpus() == 1) - goto out; + if (num_online_cpus() == 1) { + put_online_cpus(); + return; + } if (rcu_idle_cpu != -1) - cpumask_clear_cpu(rcu_idle_cpu, tmp_mask); + cpu_clear(rcu_idle_cpu, tmp_mask); - set_cpus_allowed_ptr(current, tmp_mask); + set_cpus_allowed_ptr(current, &tmp_mask); if (reader_tasks) { for (i = 0; i < nrealreaders; i++) if (reader_tasks[i]) set_cpus_allowed_ptr(reader_tasks[i], - tmp_mask); + &tmp_mask); } if (fakewriter_tasks) { for (i = 0; i < nfakewriters; i++) if (fakewriter_tasks[i]) set_cpus_allowed_ptr(fakewriter_tasks[i], - tmp_mask); + &tmp_mask); } if (writer_task) - set_cpus_allowed_ptr(writer_task, tmp_mask); + set_cpus_allowed_ptr(writer_task, &tmp_mask); if (stats_task) - set_cpus_allowed_ptr(stats_task, tmp_mask); + set_cpus_allowed_ptr(stats_task, &tmp_mask); if (rcu_idle_cpu == -1) rcu_idle_cpu = num_online_cpus() - 1; else rcu_idle_cpu--; -out: put_online_cpus(); - free_cpumask_var(tmp_mask); } /* Shuffle tasks across CPUs, with the intent of allowing each CPU in the @@ -925,7 +945,8 @@ rcu_torture_shuffle(void *arg) do { schedule_timeout_interruptible(shuffle_interval * HZ); rcu_torture_shuffle_tasks(); - } while (!kthread_should_stop() && !fullstop); + rcutorture_shutdown_absorb("rcu_torture_shuffle"); + } while (!kthread_should_stop()); VERBOSE_PRINTK_STRING("rcu_torture_shuffle task stopping"); return 0; } @@ -940,10 +961,11 @@ rcu_torture_stutter(void *arg) do { schedule_timeout_interruptible(stutter * HZ); stutter_pause_test = 1; - if (!kthread_should_stop() && !fullstop) + if (!kthread_should_stop()) schedule_timeout_interruptible(stutter * HZ); stutter_pause_test = 0; - } while (!kthread_should_stop() && !fullstop); + rcutorture_shutdown_absorb("rcu_torture_stutter"); + } while (!kthread_should_stop()); VERBOSE_PRINTK_STRING("rcu_torture_stutter task stopping"); return 0; } @@ -970,15 +992,16 @@ rcu_torture_cleanup(void) int i; mutex_lock(&fullstop_mutex); - if (!fullstop) { - /* If being signaled, let it happen, then exit. */ + if (fullstop == FULLSTOP_SHUTDOWN) { + printk(KERN_WARNING /* but going down anyway, so... */ + "Concurrent 'rmmod rcutorture' and shutdown illegal!\n"); mutex_unlock(&fullstop_mutex); - schedule_timeout_interruptible(10 * HZ); + schedule_timeout_uninterruptible(10); if (cur_ops->cb_barrier != NULL) cur_ops->cb_barrier(); return; } - fullstop = FULLSTOP_CLEANUP; + fullstop = FULLSTOP_RMMOD; mutex_unlock(&fullstop_mutex); unregister_reboot_notifier(&rcutorture_nb); if (stutter_task) { @@ -1078,7 +1101,7 @@ rcu_torture_init(void) else nrealreaders = 2 * num_online_cpus(); rcu_torture_print_module_parms("Start of test"); - fullstop = 0; + fullstop = FULLSTOP_DONTSTOP; /* Set up the freelist. */ diff --git a/kernel/rcutree.c b/kernel/rcutree.c index f2d8638e6c6..b2fd602a6f6 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -1314,7 +1314,7 @@ int rcu_needs_cpu(int cpu) * access due to the fact that this CPU cannot possibly have any RCU * callbacks in flight yet. */ -static void +static void __cpuinit rcu_init_percpu_data(int cpu, struct rcu_state *rsp) { unsigned long flags; diff --git a/kernel/relay.c b/kernel/relay.c index 09ac2008f77..9d79b7854fa 100644 --- a/kernel/relay.c +++ b/kernel/relay.c @@ -663,8 +663,10 @@ int relay_late_setup_files(struct rchan *chan, mutex_lock(&relay_channels_mutex); /* Is chan already set up? */ - if (unlikely(chan->has_base_filename)) + if (unlikely(chan->has_base_filename)) { + mutex_unlock(&relay_channels_mutex); return -EEXIST; + } chan->has_base_filename = 1; chan->parent = parent; curr_cpu = get_cpu(); diff --git a/kernel/resource.c b/kernel/resource.c index ca6a1536b20..fd5d7d574bb 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -620,6 +620,7 @@ resource_size_t resource_alignment(struct resource *res) * @start: resource start address * @n: resource region size * @name: reserving caller's ID string + * @flags: IO resource flags */ struct resource * __request_region(struct resource *parent, resource_size_t start, resource_size_t n, diff --git a/kernel/sched.c b/kernel/sched.c index deb5ac8c12f..52bbf1c842a 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -125,6 +125,9 @@ DEFINE_TRACE(sched_switch); DEFINE_TRACE(sched_migrate_task); #ifdef CONFIG_SMP + +static void double_rq_lock(struct rq *rq1, struct rq *rq2); + /* * Divide a load by a sched group cpu_power : (load / sg->__cpu_power) * Since cpu_power is a 'constant', we can use a reciprocal divide. @@ -1320,8 +1323,8 @@ static inline void update_load_sub(struct load_weight *lw, unsigned long dec) * slice expiry etc. */ -#define WEIGHT_IDLEPRIO 2 -#define WMULT_IDLEPRIO (1 << 31) +#define WEIGHT_IDLEPRIO 3 +#define WMULT_IDLEPRIO 1431655765 /* * Nice levels are multiplicative, with a gentle 10% change for every @@ -4437,7 +4440,7 @@ void __kprobes sub_preempt_count(int val) /* * Underflow? */ - if (DEBUG_LOCKS_WARN_ON(val > preempt_count() - (!!kernel_locked()))) + if (DEBUG_LOCKS_WARN_ON(val > preempt_count())) return; /* * Is the spinlock portion underflowing? @@ -5123,7 +5126,7 @@ int can_nice(const struct task_struct *p, const int nice) * sys_setpriority is a more generic, but much slower function that * does similar things. */ -asmlinkage long sys_nice(int increment) +SYSCALL_DEFINE1(nice, int, increment) { long nice, retval; @@ -5430,8 +5433,8 @@ do_sched_setscheduler(pid_t pid, int policy, struct sched_param __user *param) * @policy: new policy. * @param: structure containing the new RT priority. */ -asmlinkage long -sys_sched_setscheduler(pid_t pid, int policy, struct sched_param __user *param) +SYSCALL_DEFINE3(sched_setscheduler, pid_t, pid, int, policy, + struct sched_param __user *, param) { /* negative values for policy are not valid */ if (policy < 0) @@ -5445,7 +5448,7 @@ sys_sched_setscheduler(pid_t pid, int policy, struct sched_param __user *param) * @pid: the pid in question. * @param: structure containing the new RT priority. */ -asmlinkage long sys_sched_setparam(pid_t pid, struct sched_param __user *param) +SYSCALL_DEFINE2(sched_setparam, pid_t, pid, struct sched_param __user *, param) { return do_sched_setscheduler(pid, -1, param); } @@ -5454,7 +5457,7 @@ asmlinkage long sys_sched_setparam(pid_t pid, struct sched_param __user *param) * sys_sched_getscheduler - get the policy (scheduling class) of a thread * @pid: the pid in question. */ -asmlinkage long sys_sched_getscheduler(pid_t pid) +SYSCALL_DEFINE1(sched_getscheduler, pid_t, pid) { struct task_struct *p; int retval; @@ -5479,7 +5482,7 @@ asmlinkage long sys_sched_getscheduler(pid_t pid) * @pid: the pid in question. * @param: structure containing the RT priority. */ -asmlinkage long sys_sched_getparam(pid_t pid, struct sched_param __user *param) +SYSCALL_DEFINE2(sched_getparam, pid_t, pid, struct sched_param __user *, param) { struct sched_param lp; struct task_struct *p; @@ -5597,8 +5600,8 @@ static int get_user_cpu_mask(unsigned long __user *user_mask_ptr, unsigned len, * @len: length in bytes of the bitmask pointed to by user_mask_ptr * @user_mask_ptr: user-space pointer to the new cpu mask */ -asmlinkage long sys_sched_setaffinity(pid_t pid, unsigned int len, - unsigned long __user *user_mask_ptr) +SYSCALL_DEFINE3(sched_setaffinity, pid_t, pid, unsigned int, len, + unsigned long __user *, user_mask_ptr) { cpumask_var_t new_mask; int retval; @@ -5645,8 +5648,8 @@ out_unlock: * @len: length in bytes of the bitmask pointed to by user_mask_ptr * @user_mask_ptr: user-space pointer to hold the current cpu mask */ -asmlinkage long sys_sched_getaffinity(pid_t pid, unsigned int len, - unsigned long __user *user_mask_ptr) +SYSCALL_DEFINE3(sched_getaffinity, pid_t, pid, unsigned int, len, + unsigned long __user *, user_mask_ptr) { int ret; cpumask_var_t mask; @@ -5675,7 +5678,7 @@ asmlinkage long sys_sched_getaffinity(pid_t pid, unsigned int len, * This function yields the current CPU to other tasks. If there are no * other threads running on this CPU then this function will return. */ -asmlinkage long sys_sched_yield(void) +SYSCALL_DEFINE0(sched_yield) { struct rq *rq = this_rq_lock(); @@ -5816,7 +5819,7 @@ long __sched io_schedule_timeout(long timeout) * this syscall returns the maximum rt_priority that can be used * by a given scheduling class. */ -asmlinkage long sys_sched_get_priority_max(int policy) +SYSCALL_DEFINE1(sched_get_priority_max, int, policy) { int ret = -EINVAL; @@ -5841,7 +5844,7 @@ asmlinkage long sys_sched_get_priority_max(int policy) * this syscall returns the minimum rt_priority that can be used * by a given scheduling class. */ -asmlinkage long sys_sched_get_priority_min(int policy) +SYSCALL_DEFINE1(sched_get_priority_min, int, policy) { int ret = -EINVAL; @@ -5866,8 +5869,8 @@ asmlinkage long sys_sched_get_priority_min(int policy) * this syscall writes the default timeslice value of a given process * into the user-space timespec buffer. A value of '0' means infinity. */ -asmlinkage -long sys_sched_rr_get_interval(pid_t pid, struct timespec __user *interval) +SYSCALL_DEFINE2(sched_rr_get_interval, pid_t, pid, + struct timespec __user *, interval) { struct task_struct *p; unsigned int time_slice; @@ -7282,10 +7285,10 @@ cpu_to_phys_group(int cpu, const struct cpumask *cpu_map, * groups, so roll our own. Now each node has its own list of groups which * gets dynamically allocated. */ -static DEFINE_PER_CPU(struct sched_domain, node_domains); +static DEFINE_PER_CPU(struct static_sched_domain, node_domains); static struct sched_group ***sched_group_nodes_bycpu; -static DEFINE_PER_CPU(struct sched_domain, allnodes_domains); +static DEFINE_PER_CPU(struct static_sched_domain, allnodes_domains); static DEFINE_PER_CPU(struct static_sched_group, sched_group_allnodes); static int cpu_to_allnodes_group(int cpu, const struct cpumask *cpu_map, @@ -7560,7 +7563,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map, #ifdef CONFIG_NUMA if (cpumask_weight(cpu_map) > SD_NODES_PER_DOMAIN*cpumask_weight(nodemask)) { - sd = &per_cpu(allnodes_domains, i); + sd = &per_cpu(allnodes_domains, i).sd; SD_INIT(sd, ALLNODES); set_domain_attribute(sd, attr); cpumask_copy(sched_domain_span(sd), cpu_map); @@ -7570,7 +7573,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map, } else p = NULL; - sd = &per_cpu(node_domains, i); + sd = &per_cpu(node_domains, i).sd; SD_INIT(sd, NODE); set_domain_attribute(sd, attr); sched_domain_node_span(cpu_to_node(i), sched_domain_span(sd)); @@ -7688,7 +7691,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map, for_each_cpu(j, nodemask) { struct sched_domain *sd; - sd = &per_cpu(node_domains, j); + sd = &per_cpu(node_domains, j).sd; sd->groups = sg; } sg->__cpu_power = 0; @@ -9047,6 +9050,13 @@ static int tg_schedulable(struct task_group *tg, void *data) runtime = d->rt_runtime; } +#ifdef CONFIG_USER_SCHED + if (tg == &root_task_group) { + period = global_rt_period(); + runtime = global_rt_runtime(); + } +#endif + /* * Cannot have more runtime than the period. */ diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c index 4293cfa9681..16eeba4e416 100644 --- a/kernel/sched_debug.c +++ b/kernel/sched_debug.c @@ -145,6 +145,19 @@ static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu) read_unlock_irqrestore(&tasklist_lock, flags); } +#if defined(CONFIG_CGROUP_SCHED) && \ + (defined(CONFIG_FAIR_GROUP_SCHED) || defined(CONFIG_RT_GROUP_SCHED)) +static void task_group_path(struct task_group *tg, char *buf, int buflen) +{ + /* may be NULL if the underlying cgroup isn't fully-created yet */ + if (!tg->css.cgroup) { + buf[0] = '\0'; + return; + } + cgroup_path(tg->css.cgroup, buf, buflen); +} +#endif + void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) { s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1, @@ -154,10 +167,10 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) unsigned long flags; #if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_FAIR_GROUP_SCHED) - char path[128] = ""; + char path[128]; struct task_group *tg = cfs_rq->tg; - cgroup_path(tg->css.cgroup, path, sizeof(path)); + task_group_path(tg, path, sizeof(path)); SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, path); #elif defined(CONFIG_USER_SCHED) && defined(CONFIG_FAIR_GROUP_SCHED) @@ -208,10 +221,10 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) { #if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_RT_GROUP_SCHED) - char path[128] = ""; + char path[128]; struct task_group *tg = rt_rq->tg; - cgroup_path(tg->css.cgroup, path, sizeof(path)); + task_group_path(tg, path, sizeof(path)); SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, path); #else diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 8e1352c7555..5cc1c162044 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -283,7 +283,7 @@ static void update_min_vruntime(struct cfs_rq *cfs_rq) struct sched_entity, run_node); - if (vruntime == cfs_rq->min_vruntime) + if (!cfs_rq->curr) vruntime = se->vruntime; else vruntime = min_vruntime(vruntime, se->vruntime); @@ -429,7 +429,10 @@ static u64 sched_slice(struct cfs_rq *cfs_rq, struct sched_entity *se) u64 slice = __sched_period(cfs_rq->nr_running + !se->on_rq); for_each_sched_entity(se) { - struct load_weight *load = &cfs_rq->load; + struct load_weight *load; + + cfs_rq = cfs_rq_of(se); + load = &cfs_rq->load; if (unlikely(!se->on_rq)) { struct load_weight lw = cfs_rq->load; @@ -677,9 +680,13 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial) unsigned long thresh = sysctl_sched_latency; /* - * convert the sleeper threshold into virtual time + * Convert the sleeper threshold into virtual time. + * SCHED_IDLE is a special sub-class. We care about + * fairness only relative to other SCHED_IDLE tasks, + * all of which have the same weight. */ - if (sched_feat(NORMALIZED_SLEEPER)) + if (sched_feat(NORMALIZED_SLEEPER) && + task_of(se)->policy != SCHED_IDLE) thresh = calc_delta_fair(thresh, se); vruntime -= thresh; @@ -1340,14 +1347,18 @@ wakeup_preempt_entity(struct sched_entity *curr, struct sched_entity *se) static void set_last_buddy(struct sched_entity *se) { - for_each_sched_entity(se) - cfs_rq_of(se)->last = se; + if (likely(task_of(se)->policy != SCHED_IDLE)) { + for_each_sched_entity(se) + cfs_rq_of(se)->last = se; + } } static void set_next_buddy(struct sched_entity *se) { - for_each_sched_entity(se) - cfs_rq_of(se)->next = se; + if (likely(task_of(se)->policy != SCHED_IDLE)) { + for_each_sched_entity(se) + cfs_rq_of(se)->next = se; + } } /* @@ -1393,12 +1404,18 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int sync) return; /* - * Batch tasks do not preempt (their preemption is driven by + * Batch and idle tasks do not preempt (their preemption is driven by * the tick): */ - if (unlikely(p->policy == SCHED_BATCH)) + if (unlikely(p->policy != SCHED_NORMAL)) return; + /* Idle tasks are by definition preempted by everybody. */ + if (unlikely(curr->policy == SCHED_IDLE)) { + resched_task(curr); + return; + } + if (!sched_feat(WAKEUP_PREEMPT)) return; diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h index f2773b5d122..8ab0cef8eca 100644 --- a/kernel/sched_stats.h +++ b/kernel/sched_stats.h @@ -296,6 +296,7 @@ sched_info_switch(struct task_struct *prev, struct task_struct *next) static inline void account_group_user_time(struct task_struct *tsk, cputime_t cputime) { + struct task_cputime *times; struct signal_struct *sig; /* tsk == current, ensure it is safe to use ->signal */ @@ -303,13 +304,11 @@ static inline void account_group_user_time(struct task_struct *tsk, return; sig = tsk->signal; - if (sig->cputime.totals) { - struct task_cputime *times; + times = &sig->cputime.totals; - times = per_cpu_ptr(sig->cputime.totals, get_cpu()); - times->utime = cputime_add(times->utime, cputime); - put_cpu_no_resched(); - } + spin_lock(×->lock); + times->utime = cputime_add(times->utime, cputime); + spin_unlock(×->lock); } /** @@ -325,6 +324,7 @@ static inline void account_group_user_time(struct task_struct *tsk, static inline void account_group_system_time(struct task_struct *tsk, cputime_t cputime) { + struct task_cputime *times; struct signal_struct *sig; /* tsk == current, ensure it is safe to use ->signal */ @@ -332,13 +332,11 @@ static inline void account_group_system_time(struct task_struct *tsk, return; sig = tsk->signal; - if (sig->cputime.totals) { - struct task_cputime *times; + times = &sig->cputime.totals; - times = per_cpu_ptr(sig->cputime.totals, get_cpu()); - times->stime = cputime_add(times->stime, cputime); - put_cpu_no_resched(); - } + spin_lock(×->lock); + times->stime = cputime_add(times->stime, cputime); + spin_unlock(×->lock); } /** @@ -354,6 +352,7 @@ static inline void account_group_system_time(struct task_struct *tsk, static inline void account_group_exec_runtime(struct task_struct *tsk, unsigned long long ns) { + struct task_cputime *times; struct signal_struct *sig; sig = tsk->signal; @@ -362,11 +361,9 @@ static inline void account_group_exec_runtime(struct task_struct *tsk, if (unlikely(!sig)) return; - if (sig->cputime.totals) { - struct task_cputime *times; + times = &sig->cputime.totals; - times = per_cpu_ptr(sig->cputime.totals, get_cpu()); - times->sum_exec_runtime += ns; - put_cpu_no_resched(); - } + spin_lock(×->lock); + times->sum_exec_runtime += ns; + spin_unlock(×->lock); } diff --git a/kernel/signal.c b/kernel/signal.c index 3152ac3b62e..e73759783dc 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1961,7 +1961,7 @@ EXPORT_SYMBOL(unblock_all_signals); * System call entry points. */ -asmlinkage long sys_restart_syscall(void) +SYSCALL_DEFINE0(restart_syscall) { struct restart_block *restart = ¤t_thread_info()->restart_block; return restart->fn(restart); @@ -2014,8 +2014,8 @@ int sigprocmask(int how, sigset_t *set, sigset_t *oldset) return error; } -asmlinkage long -sys_rt_sigprocmask(int how, sigset_t __user *set, sigset_t __user *oset, size_t sigsetsize) +SYSCALL_DEFINE4(rt_sigprocmask, int, how, sigset_t __user *, set, + sigset_t __user *, oset, size_t, sigsetsize) { int error = -EINVAL; sigset_t old_set, new_set; @@ -2074,8 +2074,7 @@ out: return error; } -asmlinkage long -sys_rt_sigpending(sigset_t __user *set, size_t sigsetsize) +SYSCALL_DEFINE2(rt_sigpending, sigset_t __user *, set, size_t, sigsetsize) { return do_sigpending(set, sigsetsize); } @@ -2146,11 +2145,9 @@ int copy_siginfo_to_user(siginfo_t __user *to, siginfo_t *from) #endif -asmlinkage long -sys_rt_sigtimedwait(const sigset_t __user *uthese, - siginfo_t __user *uinfo, - const struct timespec __user *uts, - size_t sigsetsize) +SYSCALL_DEFINE4(rt_sigtimedwait, const sigset_t __user *, uthese, + siginfo_t __user *, uinfo, const struct timespec __user *, uts, + size_t, sigsetsize) { int ret, sig; sigset_t these; @@ -2223,8 +2220,7 @@ sys_rt_sigtimedwait(const sigset_t __user *uthese, return ret; } -asmlinkage long -sys_kill(pid_t pid, int sig) +SYSCALL_DEFINE2(kill, pid_t, pid, int, sig) { struct siginfo info; @@ -2283,7 +2279,7 @@ static int do_tkill(pid_t tgid, pid_t pid, int sig) * exists but it's not belonging to the target process anymore. This * method solves the problem of threads exiting and PIDs getting reused. */ -asmlinkage long sys_tgkill(pid_t tgid, pid_t pid, int sig) +SYSCALL_DEFINE3(tgkill, pid_t, tgid, pid_t, pid, int, sig) { /* This is only valid for single tasks */ if (pid <= 0 || tgid <= 0) @@ -2295,8 +2291,7 @@ asmlinkage long sys_tgkill(pid_t tgid, pid_t pid, int sig) /* * Send a signal to only one task, even if it's a CLONE_THREAD task. */ -asmlinkage long -sys_tkill(pid_t pid, int sig) +SYSCALL_DEFINE2(tkill, pid_t, pid, int, sig) { /* This is only valid for single tasks */ if (pid <= 0) @@ -2305,8 +2300,8 @@ sys_tkill(pid_t pid, int sig) return do_tkill(0, pid, sig); } -asmlinkage long -sys_rt_sigqueueinfo(pid_t pid, int sig, siginfo_t __user *uinfo) +SYSCALL_DEFINE3(rt_sigqueueinfo, pid_t, pid, int, sig, + siginfo_t __user *, uinfo) { siginfo_t info; @@ -2434,8 +2429,7 @@ out: #ifdef __ARCH_WANT_SYS_SIGPENDING -asmlinkage long -sys_sigpending(old_sigset_t __user *set) +SYSCALL_DEFINE1(sigpending, old_sigset_t __user *, set) { return do_sigpending(set, sizeof(*set)); } @@ -2446,8 +2440,8 @@ sys_sigpending(old_sigset_t __user *set) /* Some platforms have their own version with special arguments others support only sys_rt_sigprocmask. */ -asmlinkage long -sys_sigprocmask(int how, old_sigset_t __user *set, old_sigset_t __user *oset) +SYSCALL_DEFINE3(sigprocmask, int, how, old_sigset_t __user *, set, + old_sigset_t __user *, oset) { int error; old_sigset_t old_set, new_set; @@ -2497,11 +2491,10 @@ out: #endif /* __ARCH_WANT_SYS_SIGPROCMASK */ #ifdef __ARCH_WANT_SYS_RT_SIGACTION -asmlinkage long -sys_rt_sigaction(int sig, - const struct sigaction __user *act, - struct sigaction __user *oact, - size_t sigsetsize) +SYSCALL_DEFINE4(rt_sigaction, int, sig, + const struct sigaction __user *, act, + struct sigaction __user *, oact, + size_t, sigsetsize) { struct k_sigaction new_sa, old_sa; int ret = -EINVAL; @@ -2531,15 +2524,13 @@ out: /* * For backwards compatibility. Functionality superseded by sigprocmask. */ -asmlinkage long -sys_sgetmask(void) +SYSCALL_DEFINE0(sgetmask) { /* SMP safe */ return current->blocked.sig[0]; } -asmlinkage long -sys_ssetmask(int newmask) +SYSCALL_DEFINE1(ssetmask, int, newmask) { int old; @@ -2559,8 +2550,7 @@ sys_ssetmask(int newmask) /* * For backwards compatibility. Functionality superseded by sigaction. */ -asmlinkage unsigned long -sys_signal(int sig, __sighandler_t handler) +SYSCALL_DEFINE2(signal, int, sig, __sighandler_t, handler) { struct k_sigaction new_sa, old_sa; int ret; @@ -2577,8 +2567,7 @@ sys_signal(int sig, __sighandler_t handler) #ifdef __ARCH_WANT_SYS_PAUSE -asmlinkage long -sys_pause(void) +SYSCALL_DEFINE0(pause) { current->state = TASK_INTERRUPTIBLE; schedule(); @@ -2588,7 +2577,7 @@ sys_pause(void) #endif #ifdef __ARCH_WANT_SYS_RT_SIGSUSPEND -asmlinkage long sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize) +SYSCALL_DEFINE2(rt_sigsuspend, sigset_t __user *, unewset, size_t, sigsetsize) { sigset_t newset; diff --git a/kernel/softlockup.c b/kernel/softlockup.c index d9188c66278..85d5a245510 100644 --- a/kernel/softlockup.c +++ b/kernel/softlockup.c @@ -16,6 +16,7 @@ #include <linux/lockdep.h> #include <linux/notifier.h> #include <linux/module.h> +#include <linux/sysctl.h> #include <asm/irq_regs.h> @@ -88,6 +89,14 @@ void touch_all_softlockup_watchdogs(void) } EXPORT_SYMBOL(touch_all_softlockup_watchdogs); +int proc_dosoftlockup_thresh(struct ctl_table *table, int write, + struct file *filp, void __user *buffer, + size_t *lenp, loff_t *ppos) +{ + touch_all_softlockup_watchdogs(); + return proc_dointvec_minmax(table, write, filp, buffer, lenp, ppos); +} + /* * This callback runs from the timer interrupt, and checks * whether the watchdog thread has hung or not: diff --git a/kernel/sys.c b/kernel/sys.c index 763c3c17ded..e7dc0e10a48 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -143,7 +143,7 @@ out: return error; } -asmlinkage long sys_setpriority(int which, int who, int niceval) +SYSCALL_DEFINE3(setpriority, int, which, int, who, int, niceval) { struct task_struct *g, *p; struct user_struct *user; @@ -208,7 +208,7 @@ out: * has been offset by 20 (ie it returns 40..1 instead of -20..19) * to stay compatible. */ -asmlinkage long sys_getpriority(int which, int who) +SYSCALL_DEFINE2(getpriority, int, which, int, who) { struct task_struct *g, *p; struct user_struct *user; @@ -355,7 +355,8 @@ EXPORT_SYMBOL_GPL(kernel_power_off); * * reboot doesn't sync: do that yourself before calling this. */ -asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user * arg) +SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd, + void __user *, arg) { char buffer[256]; @@ -478,7 +479,7 @@ void ctrl_alt_del(void) * SMP: There are not races, the GIDs are checked only by filesystem * operations (as far as semantic preservation is concerned). */ -asmlinkage long sys_setregid(gid_t rgid, gid_t egid) +SYSCALL_DEFINE2(setregid, gid_t, rgid, gid_t, egid) { const struct cred *old; struct cred *new; @@ -529,7 +530,7 @@ error: * * SMP: Same implicit races as above. */ -asmlinkage long sys_setgid(gid_t gid) +SYSCALL_DEFINE1(setgid, gid_t, gid) { const struct cred *old; struct cred *new; @@ -597,7 +598,7 @@ static int set_user(struct cred *new) * 100% compatible with BSD. A program which uses just setuid() will be * 100% compatible with POSIX with saved IDs. */ -asmlinkage long sys_setreuid(uid_t ruid, uid_t euid) +SYSCALL_DEFINE2(setreuid, uid_t, ruid, uid_t, euid) { const struct cred *old; struct cred *new; @@ -661,7 +662,7 @@ error: * will allow a root program to temporarily drop privileges and be able to * regain them by swapping the real and effective uid. */ -asmlinkage long sys_setuid(uid_t uid) +SYSCALL_DEFINE1(setuid, uid_t, uid) { const struct cred *old; struct cred *new; @@ -705,7 +706,7 @@ error: * This function implements a generic ability to update ruid, euid, * and suid. This allows you to implement the 4.4 compatible seteuid(). */ -asmlinkage long sys_setresuid(uid_t ruid, uid_t euid, uid_t suid) +SYSCALL_DEFINE3(setresuid, uid_t, ruid, uid_t, euid, uid_t, suid) { const struct cred *old; struct cred *new; @@ -756,7 +757,7 @@ error: return retval; } -asmlinkage long sys_getresuid(uid_t __user *ruid, uid_t __user *euid, uid_t __user *suid) +SYSCALL_DEFINE3(getresuid, uid_t __user *, ruid, uid_t __user *, euid, uid_t __user *, suid) { const struct cred *cred = current_cred(); int retval; @@ -771,7 +772,7 @@ asmlinkage long sys_getresuid(uid_t __user *ruid, uid_t __user *euid, uid_t __us /* * Same as above, but for rgid, egid, sgid. */ -asmlinkage long sys_setresgid(gid_t rgid, gid_t egid, gid_t sgid) +SYSCALL_DEFINE3(setresgid, gid_t, rgid, gid_t, egid, gid_t, sgid) { const struct cred *old; struct cred *new; @@ -814,7 +815,7 @@ error: return retval; } -asmlinkage long sys_getresgid(gid_t __user *rgid, gid_t __user *egid, gid_t __user *sgid) +SYSCALL_DEFINE3(getresgid, gid_t __user *, rgid, gid_t __user *, egid, gid_t __user *, sgid) { const struct cred *cred = current_cred(); int retval; @@ -833,7 +834,7 @@ asmlinkage long sys_getresgid(gid_t __user *rgid, gid_t __user *egid, gid_t __us * whatever uid it wants to). It normally shadows "euid", except when * explicitly set by setfsuid() or for access.. */ -asmlinkage long sys_setfsuid(uid_t uid) +SYSCALL_DEFINE1(setfsuid, uid_t, uid) { const struct cred *old; struct cred *new; @@ -870,7 +871,7 @@ change_okay: /* * Samma på svenska.. */ -asmlinkage long sys_setfsgid(gid_t gid) +SYSCALL_DEFINE1(setfsgid, gid_t, gid) { const struct cred *old; struct cred *new; @@ -919,7 +920,7 @@ void do_sys_times(struct tms *tms) tms->tms_cstime = cputime_to_clock_t(cstime); } -asmlinkage long sys_times(struct tms __user * tbuf) +SYSCALL_DEFINE1(times, struct tms __user *, tbuf) { if (tbuf) { struct tms tmp; @@ -944,7 +945,7 @@ asmlinkage long sys_times(struct tms __user * tbuf) * Auch. Had to add the 'did_exec' flag to conform completely to POSIX. * LBT 04.03.94 */ -asmlinkage long sys_setpgid(pid_t pid, pid_t pgid) +SYSCALL_DEFINE2(setpgid, pid_t, pid, pid_t, pgid) { struct task_struct *p; struct task_struct *group_leader = current->group_leader; @@ -1015,7 +1016,7 @@ out: return err; } -asmlinkage long sys_getpgid(pid_t pid) +SYSCALL_DEFINE1(getpgid, pid_t, pid) { struct task_struct *p; struct pid *grp; @@ -1045,14 +1046,14 @@ out: #ifdef __ARCH_WANT_SYS_GETPGRP -asmlinkage long sys_getpgrp(void) +SYSCALL_DEFINE0(getpgrp) { return sys_getpgid(0); } #endif -asmlinkage long sys_getsid(pid_t pid) +SYSCALL_DEFINE1(getsid, pid_t, pid) { struct task_struct *p; struct pid *sid; @@ -1080,7 +1081,7 @@ out: return retval; } -asmlinkage long sys_setsid(void) +SYSCALL_DEFINE0(setsid) { struct task_struct *group_leader = current->group_leader; struct pid *sid = task_pid(group_leader); @@ -1311,7 +1312,7 @@ int set_current_groups(struct group_info *group_info) EXPORT_SYMBOL(set_current_groups); -asmlinkage long sys_getgroups(int gidsetsize, gid_t __user *grouplist) +SYSCALL_DEFINE2(getgroups, int, gidsetsize, gid_t __user *, grouplist) { const struct cred *cred = current_cred(); int i; @@ -1340,7 +1341,7 @@ out: * without another task interfering. */ -asmlinkage long sys_setgroups(int gidsetsize, gid_t __user *grouplist) +SYSCALL_DEFINE2(setgroups, int, gidsetsize, gid_t __user *, grouplist) { struct group_info *group_info; int retval; @@ -1394,7 +1395,7 @@ EXPORT_SYMBOL(in_egroup_p); DECLARE_RWSEM(uts_sem); -asmlinkage long sys_newuname(struct new_utsname __user * name) +SYSCALL_DEFINE1(newuname, struct new_utsname __user *, name) { int errno = 0; @@ -1405,7 +1406,7 @@ asmlinkage long sys_newuname(struct new_utsname __user * name) return errno; } -asmlinkage long sys_sethostname(char __user *name, int len) +SYSCALL_DEFINE2(sethostname, char __user *, name, int, len) { int errno; char tmp[__NEW_UTS_LEN]; @@ -1429,7 +1430,7 @@ asmlinkage long sys_sethostname(char __user *name, int len) #ifdef __ARCH_WANT_SYS_GETHOSTNAME -asmlinkage long sys_gethostname(char __user *name, int len) +SYSCALL_DEFINE2(gethostname, char __user *, name, int, len) { int i, errno; struct new_utsname *u; @@ -1454,7 +1455,7 @@ asmlinkage long sys_gethostname(char __user *name, int len) * Only setdomainname; getdomainname can be implemented by calling * uname() */ -asmlinkage long sys_setdomainname(char __user *name, int len) +SYSCALL_DEFINE2(setdomainname, char __user *, name, int, len) { int errno; char tmp[__NEW_UTS_LEN]; @@ -1477,7 +1478,7 @@ asmlinkage long sys_setdomainname(char __user *name, int len) return errno; } -asmlinkage long sys_getrlimit(unsigned int resource, struct rlimit __user *rlim) +SYSCALL_DEFINE2(getrlimit, unsigned int, resource, struct rlimit __user *, rlim) { if (resource >= RLIM_NLIMITS) return -EINVAL; @@ -1496,7 +1497,8 @@ asmlinkage long sys_getrlimit(unsigned int resource, struct rlimit __user *rlim) * Back compatibility for getrlimit. Needed for some apps. */ -asmlinkage long sys_old_getrlimit(unsigned int resource, struct rlimit __user *rlim) +SYSCALL_DEFINE2(old_getrlimit, unsigned int, resource, + struct rlimit __user *, rlim) { struct rlimit x; if (resource >= RLIM_NLIMITS) @@ -1514,7 +1516,7 @@ asmlinkage long sys_old_getrlimit(unsigned int resource, struct rlimit __user *r #endif -asmlinkage long sys_setrlimit(unsigned int resource, struct rlimit __user *rlim) +SYSCALL_DEFINE2(setrlimit, unsigned int, resource, struct rlimit __user *, rlim) { struct rlimit new_rlim, *old_rlim; int retval; @@ -1687,7 +1689,7 @@ int getrusage(struct task_struct *p, int who, struct rusage __user *ru) return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; } -asmlinkage long sys_getrusage(int who, struct rusage __user *ru) +SYSCALL_DEFINE2(getrusage, int, who, struct rusage __user *, ru) { if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN && who != RUSAGE_THREAD) @@ -1695,14 +1697,14 @@ asmlinkage long sys_getrusage(int who, struct rusage __user *ru) return getrusage(current, who, ru); } -asmlinkage long sys_umask(int mask) +SYSCALL_DEFINE1(umask, int, mask) { mask = xchg(¤t->fs->umask, mask & S_IRWXUGO); return mask; } -asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3, - unsigned long arg4, unsigned long arg5) +SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, + unsigned long, arg4, unsigned long, arg5) { struct task_struct *me = current; unsigned char comm[sizeof(me->comm)]; @@ -1815,8 +1817,8 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3, return error; } -asmlinkage long sys_getcpu(unsigned __user *cpup, unsigned __user *nodep, - struct getcpu_cache __user *unused) +SYSCALL_DEFINE3(getcpu, unsigned __user *, cpup, unsigned __user *, nodep, + struct getcpu_cache __user *, unused) { int err = 0; int cpu = raw_smp_processor_id(); diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c index e14a2328170..27dad296738 100644 --- a/kernel/sys_ni.c +++ b/kernel/sys_ni.c @@ -131,6 +131,7 @@ cond_syscall(sys_io_destroy); cond_syscall(sys_io_submit); cond_syscall(sys_io_cancel); cond_syscall(sys_io_getevents); +cond_syscall(sys_syslog); /* arch-specific weak syscall entries */ cond_syscall(sys_pciconfig_read); diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 89d74436318..790f9d78566 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -144,6 +144,7 @@ extern int acct_parm[]; #ifdef CONFIG_IA64 extern int no_unaligned_warning; +extern int unaligned_dump_stack; #endif #ifdef CONFIG_RT_MUTEXES @@ -781,6 +782,14 @@ static struct ctl_table kern_table[] = { .mode = 0644, .proc_handler = &proc_dointvec, }, + { + .ctl_name = CTL_UNNUMBERED, + .procname = "unaligned-dump-stack", + .data = &unaligned_dump_stack, + .maxlen = sizeof (int), + .mode = 0644, + .proc_handler = &proc_dointvec, + }, #endif #ifdef CONFIG_DETECT_SOFTLOCKUP { @@ -800,7 +809,7 @@ static struct ctl_table kern_table[] = { .data = &softlockup_thresh, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = &proc_dointvec_minmax, + .proc_handler = &proc_dosoftlockup_thresh, .strategy = &sysctl_intvec, .extra1 = &neg_one, .extra2 = &sixty, @@ -1688,7 +1697,7 @@ int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *ol return error; } -asmlinkage long sys_sysctl(struct __sysctl_args __user *args) +SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args) { struct __sysctl_args tmp; int error; @@ -2989,7 +2998,7 @@ int sysctl_ms_jiffies(struct ctl_table *table, #else /* CONFIG_SYSCTL_SYSCALL */ -asmlinkage long sys_sysctl(struct __sysctl_args __user *args) +SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args) { struct __sysctl_args tmp; int error; diff --git a/kernel/time.c b/kernel/time.c index 4886e3ce83a..29511943871 100644 --- a/kernel/time.c +++ b/kernel/time.c @@ -60,7 +60,7 @@ EXPORT_SYMBOL(sys_tz); * why not move it into the appropriate arch directory (for those * architectures that need it). */ -asmlinkage long sys_time(time_t __user * tloc) +SYSCALL_DEFINE1(time, time_t __user *, tloc) { time_t i = get_seconds(); @@ -79,7 +79,7 @@ asmlinkage long sys_time(time_t __user * tloc) * architectures that need it). */ -asmlinkage long sys_stime(time_t __user *tptr) +SYSCALL_DEFINE1(stime, time_t __user *, tptr) { struct timespec tv; int err; @@ -99,8 +99,8 @@ asmlinkage long sys_stime(time_t __user *tptr) #endif /* __ARCH_WANT_SYS_TIME */ -asmlinkage long sys_gettimeofday(struct timeval __user *tv, - struct timezone __user *tz) +SYSCALL_DEFINE2(gettimeofday, struct timeval __user *, tv, + struct timezone __user *, tz) { if (likely(tv != NULL)) { struct timeval ktv; @@ -184,8 +184,8 @@ int do_sys_settimeofday(struct timespec *tv, struct timezone *tz) return 0; } -asmlinkage long sys_settimeofday(struct timeval __user *tv, - struct timezone __user *tz) +SYSCALL_DEFINE2(settimeofday, struct timeval __user *, tv, + struct timezone __user *, tz) { struct timeval user_tv; struct timespec new_ts; @@ -205,7 +205,7 @@ asmlinkage long sys_settimeofday(struct timeval __user *tv, return do_sys_settimeofday(tv ? &new_ts : NULL, tz ? &new_tz : NULL); } -asmlinkage long sys_adjtimex(struct timex __user *txc_p) +SYSCALL_DEFINE1(adjtimex, struct timex __user *, txc_p) { struct timex txc; /* Local copy of parameter */ int ret; diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 1b6c05bd0d0..d3f1ef4d5cb 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -134,7 +134,7 @@ __setup("nohz=", setup_tick_nohz); * value. We do this unconditionally on any cpu, as we don't know whether the * cpu, which has the update task assigned is in a long sleep. */ -void tick_nohz_update_jiffies(void) +static void tick_nohz_update_jiffies(void) { int cpu = smp_processor_id(); struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu); diff --git a/kernel/timer.c b/kernel/timer.c index dee3f641a7a..13dd64fe143 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -1129,7 +1129,7 @@ void do_timer(unsigned long ticks) * For backwards compatibility? This can be done in libc so Alpha * and all newer ports shouldn't need it. */ -asmlinkage unsigned long sys_alarm(unsigned int seconds) +SYSCALL_DEFINE1(alarm, unsigned int, seconds) { return alarm_setitimer(seconds); } @@ -1152,7 +1152,7 @@ asmlinkage unsigned long sys_alarm(unsigned int seconds) * * This is SMP safe as current->tgid does not change. */ -asmlinkage long sys_getpid(void) +SYSCALL_DEFINE0(getpid) { return task_tgid_vnr(current); } @@ -1163,7 +1163,7 @@ asmlinkage long sys_getpid(void) * value of ->real_parent under rcu_read_lock(), see * release_task()->call_rcu(delayed_put_task_struct). */ -asmlinkage long sys_getppid(void) +SYSCALL_DEFINE0(getppid) { int pid; @@ -1174,25 +1174,25 @@ asmlinkage long sys_getppid(void) return pid; } -asmlinkage long sys_getuid(void) +SYSCALL_DEFINE0(getuid) { /* Only we change this so SMP safe */ return current_uid(); } -asmlinkage long sys_geteuid(void) +SYSCALL_DEFINE0(geteuid) { /* Only we change this so SMP safe */ return current_euid(); } -asmlinkage long sys_getgid(void) +SYSCALL_DEFINE0(getgid) { /* Only we change this so SMP safe */ return current_gid(); } -asmlinkage long sys_getegid(void) +SYSCALL_DEFINE0(getegid) { /* Only we change this so SMP safe */ return current_egid(); @@ -1308,7 +1308,7 @@ signed long __sched schedule_timeout_uninterruptible(signed long timeout) EXPORT_SYMBOL(schedule_timeout_uninterruptible); /* Thread ID - the internal kernel "pid" */ -asmlinkage long sys_gettid(void) +SYSCALL_DEFINE0(gettid) { return task_pid_vnr(current); } @@ -1400,7 +1400,7 @@ out: return 0; } -asmlinkage long sys_sysinfo(struct sysinfo __user *info) +SYSCALL_DEFINE1(sysinfo, struct sysinfo __user *, info) { struct sysinfo val; diff --git a/kernel/uid16.c b/kernel/uid16.c index 2460c3199b5..0314501688b 100644 --- a/kernel/uid16.c +++ b/kernel/uid16.c @@ -17,7 +17,7 @@ #include <asm/uaccess.h> -asmlinkage long sys_chown16(const char __user * filename, old_uid_t user, old_gid_t group) +SYSCALL_DEFINE3(chown16, const char __user *, filename, old_uid_t, user, old_gid_t, group) { long ret = sys_chown(filename, low2highuid(user), low2highgid(group)); /* avoid REGPARM breakage on x86: */ @@ -25,7 +25,7 @@ asmlinkage long sys_chown16(const char __user * filename, old_uid_t user, old_gi return ret; } -asmlinkage long sys_lchown16(const char __user * filename, old_uid_t user, old_gid_t group) +SYSCALL_DEFINE3(lchown16, const char __user *, filename, old_uid_t, user, old_gid_t, group) { long ret = sys_lchown(filename, low2highuid(user), low2highgid(group)); /* avoid REGPARM breakage on x86: */ @@ -33,7 +33,7 @@ asmlinkage long sys_lchown16(const char __user * filename, old_uid_t user, old_g return ret; } -asmlinkage long sys_fchown16(unsigned int fd, old_uid_t user, old_gid_t group) +SYSCALL_DEFINE3(fchown16, unsigned int, fd, old_uid_t, user, old_gid_t, group) { long ret = sys_fchown(fd, low2highuid(user), low2highgid(group)); /* avoid REGPARM breakage on x86: */ @@ -41,7 +41,7 @@ asmlinkage long sys_fchown16(unsigned int fd, old_uid_t user, old_gid_t group) return ret; } -asmlinkage long sys_setregid16(old_gid_t rgid, old_gid_t egid) +SYSCALL_DEFINE2(setregid16, old_gid_t, rgid, old_gid_t, egid) { long ret = sys_setregid(low2highgid(rgid), low2highgid(egid)); /* avoid REGPARM breakage on x86: */ @@ -49,7 +49,7 @@ asmlinkage long sys_setregid16(old_gid_t rgid, old_gid_t egid) return ret; } -asmlinkage long sys_setgid16(old_gid_t gid) +SYSCALL_DEFINE1(setgid16, old_gid_t, gid) { long ret = sys_setgid(low2highgid(gid)); /* avoid REGPARM breakage on x86: */ @@ -57,7 +57,7 @@ asmlinkage long sys_setgid16(old_gid_t gid) return ret; } -asmlinkage long sys_setreuid16(old_uid_t ruid, old_uid_t euid) +SYSCALL_DEFINE2(setreuid16, old_uid_t, ruid, old_uid_t, euid) { long ret = sys_setreuid(low2highuid(ruid), low2highuid(euid)); /* avoid REGPARM breakage on x86: */ @@ -65,7 +65,7 @@ asmlinkage long sys_setreuid16(old_uid_t ruid, old_uid_t euid) return ret; } -asmlinkage long sys_setuid16(old_uid_t uid) +SYSCALL_DEFINE1(setuid16, old_uid_t, uid) { long ret = sys_setuid(low2highuid(uid)); /* avoid REGPARM breakage on x86: */ @@ -73,7 +73,7 @@ asmlinkage long sys_setuid16(old_uid_t uid) return ret; } -asmlinkage long sys_setresuid16(old_uid_t ruid, old_uid_t euid, old_uid_t suid) +SYSCALL_DEFINE3(setresuid16, old_uid_t, ruid, old_uid_t, euid, old_uid_t, suid) { long ret = sys_setresuid(low2highuid(ruid), low2highuid(euid), low2highuid(suid)); @@ -82,7 +82,7 @@ asmlinkage long sys_setresuid16(old_uid_t ruid, old_uid_t euid, old_uid_t suid) return ret; } -asmlinkage long sys_getresuid16(old_uid_t __user *ruid, old_uid_t __user *euid, old_uid_t __user *suid) +SYSCALL_DEFINE3(getresuid16, old_uid_t __user *, ruid, old_uid_t __user *, euid, old_uid_t __user *, suid) { const struct cred *cred = current_cred(); int retval; @@ -94,7 +94,7 @@ asmlinkage long sys_getresuid16(old_uid_t __user *ruid, old_uid_t __user *euid, return retval; } -asmlinkage long sys_setresgid16(old_gid_t rgid, old_gid_t egid, old_gid_t sgid) +SYSCALL_DEFINE3(setresgid16, old_gid_t, rgid, old_gid_t, egid, old_gid_t, sgid) { long ret = sys_setresgid(low2highgid(rgid), low2highgid(egid), low2highgid(sgid)); @@ -103,7 +103,8 @@ asmlinkage long sys_setresgid16(old_gid_t rgid, old_gid_t egid, old_gid_t sgid) return ret; } -asmlinkage long sys_getresgid16(old_gid_t __user *rgid, old_gid_t __user *egid, old_gid_t __user *sgid) + +SYSCALL_DEFINE3(getresgid16, old_gid_t __user *, rgid, old_gid_t __user *, egid, old_gid_t __user *, sgid) { const struct cred *cred = current_cred(); int retval; @@ -115,7 +116,7 @@ asmlinkage long sys_getresgid16(old_gid_t __user *rgid, old_gid_t __user *egid, return retval; } -asmlinkage long sys_setfsuid16(old_uid_t uid) +SYSCALL_DEFINE1(setfsuid16, old_uid_t, uid) { long ret = sys_setfsuid(low2highuid(uid)); /* avoid REGPARM breakage on x86: */ @@ -123,7 +124,7 @@ asmlinkage long sys_setfsuid16(old_uid_t uid) return ret; } -asmlinkage long sys_setfsgid16(old_gid_t gid) +SYSCALL_DEFINE1(setfsgid16, old_gid_t, gid) { long ret = sys_setfsgid(low2highgid(gid)); /* avoid REGPARM breakage on x86: */ @@ -161,7 +162,7 @@ static int groups16_from_user(struct group_info *group_info, return 0; } -asmlinkage long sys_getgroups16(int gidsetsize, old_gid_t __user *grouplist) +SYSCALL_DEFINE2(getgroups16, int, gidsetsize, old_gid_t __user *, grouplist) { const struct cred *cred = current_cred(); int i; @@ -184,7 +185,7 @@ out: return i; } -asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t __user *grouplist) +SYSCALL_DEFINE2(setgroups16, int, gidsetsize, old_gid_t __user *, grouplist) { struct group_info *group_info; int retval; @@ -209,22 +210,22 @@ asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t __user *grouplist) return retval; } -asmlinkage long sys_getuid16(void) +SYSCALL_DEFINE0(getuid16) { return high2lowuid(current_uid()); } -asmlinkage long sys_geteuid16(void) +SYSCALL_DEFINE0(geteuid16) { return high2lowuid(current_euid()); } -asmlinkage long sys_getgid16(void) +SYSCALL_DEFINE0(getgid16) { return high2lowgid(current_gid()); } -asmlinkage long sys_getegid16(void) +SYSCALL_DEFINE0(getegid16) { return high2lowgid(current_egid()); } diff --git a/kernel/up.c b/kernel/up.c new file mode 100644 index 00000000000..1ff27a28bb7 --- /dev/null +++ b/kernel/up.c @@ -0,0 +1,21 @@ +/* + * Uniprocessor-only support functions. The counterpart to kernel/smp.c + */ + +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/smp.h> + +int smp_call_function_single(int cpu, void (*func) (void *info), void *info, + int wait) +{ + WARN_ON(cpu != 0); + + local_irq_disable(); + (func)(info); + local_irq_enable(); + + return 0; +} +EXPORT_SYMBOL(smp_call_function_single); diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 2f445833ae3..1f0c509b40d 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -971,6 +971,8 @@ undo: } #ifdef CONFIG_SMP +static struct workqueue_struct *work_on_cpu_wq __read_mostly; + struct work_for_cpu { struct work_struct work; long (*fn)(void *); @@ -991,8 +993,8 @@ static void do_work_for_cpu(struct work_struct *w) * @fn: the function to run * @arg: the function arg * - * This will return -EINVAL in the cpu is not online, or the return value - * of @fn otherwise. + * This will return the value @fn returns. + * It is up to the caller to ensure that the cpu doesn't go offline. */ long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg) { @@ -1001,14 +1003,8 @@ long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg) INIT_WORK(&wfc.work, do_work_for_cpu); wfc.fn = fn; wfc.arg = arg; - get_online_cpus(); - if (unlikely(!cpu_online(cpu))) - wfc.ret = -EINVAL; - else { - schedule_work_on(cpu, &wfc.work); - flush_work(&wfc.work); - } - put_online_cpus(); + queue_work_on(cpu, work_on_cpu_wq, &wfc.work); + flush_work(&wfc.work); return wfc.ret; } @@ -1025,4 +1021,8 @@ void __init init_workqueues(void) hotcpu_notifier(workqueue_cpu_callback, 0); keventd_wq = create_workqueue("events"); BUG_ON(!keventd_wq); +#ifdef CONFIG_SMP + work_on_cpu_wq = create_workqueue("work_on_cpu"); + BUG_ON(!work_on_cpu_wq); +#endif } |