diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/capability.c | 20 | ||||
| -rw-r--r-- | kernel/cpuset.c | 26 | ||||
| -rw-r--r-- | kernel/crash_dump.c | 11 | ||||
| -rw-r--r-- | kernel/exit.c | 4 | ||||
| -rw-r--r-- | kernel/itimer.c | 37 | ||||
| -rw-r--r-- | kernel/module.c | 15 | ||||
| -rw-r--r-- | kernel/posix-timers.c | 18 | ||||
| -rw-r--r-- | kernel/power/smp.c | 2 | ||||
| -rw-r--r-- | kernel/sys.c | 4 | ||||
| -rw-r--r-- | kernel/sys_ni.c | 1 | ||||
| -rw-r--r-- | kernel/sysctl.c | 12 | ||||
| -rw-r--r-- | kernel/time.c | 2 |
12 files changed, 92 insertions, 60 deletions
diff --git a/kernel/capability.c b/kernel/capability.c index 64db1ee820c..8986a37a67e 100644 --- a/kernel/capability.c +++ b/kernel/capability.c @@ -31,8 +31,14 @@ static DEFINE_SPINLOCK(task_capability_lock); * uninteresting and/or not to be changed. */ -/* +/** * sys_capget - get the capabilities of a given process. + * @header: pointer to struct that contains capability version and + * target pid data + * @dataptr: pointer to struct that contains the effective, permitted, + * and inheritable capabilities that are returned + * + * Returns 0 on success and < 0 on error. */ asmlinkage long sys_capget(cap_user_header_t header, cap_user_data_t dataptr) { @@ -141,8 +147,14 @@ static inline int cap_set_all(kernel_cap_t *effective, return ret; } -/* - * sys_capset - set capabilities for a given process, all processes, or all +/** + * sys_capset - set capabilities for a process or a group of processes + * @header: pointer to struct that contains capability version and + * target pid data + * @data: pointer to struct that contains the effective, permitted, + * and inheritable capabilities + * + * Set capabilities for a given process, all processes, or all * processes in a given process group. * * The restrictions on setting capabilities are specified as: @@ -152,6 +164,8 @@ static inline int cap_set_all(kernel_cap_t *effective, * I: any raised capabilities must be a subset of the (old current) permitted * P: any raised capabilities must be a subset of the (old current) permitted * E: must be set to a subset of (new target) permitted + * + * Returns 0 on success and < 0 on error. */ asmlinkage long sys_capset(cap_user_header_t header, const cap_user_data_t data) { diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 984c0bf3807..805fb909731 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -1440,10 +1440,10 @@ void __init cpuset_init_smp(void) /** * cpuset_fork - attach newly forked task to its parents cpuset. - * @p: pointer to task_struct of forking parent process. + * @tsk: pointer to task_struct of forking parent process. * * Description: By default, on fork, a task inherits its - * parents cpuset. The pointer to the shared cpuset is + * parent's cpuset. The pointer to the shared cpuset is * automatically copied in fork.c by dup_task_struct(). * This cpuset_fork() routine need only increment the usage * counter in that cpuset. @@ -1471,7 +1471,6 @@ void cpuset_fork(struct task_struct *tsk) * by the cpuset_sem semaphore. If you don't hold cpuset_sem, * then a zero cpuset use count is a license to any other task to * nuke the cpuset immediately. - * **/ void cpuset_exit(struct task_struct *tsk) @@ -1521,7 +1520,9 @@ void cpuset_init_current_mems_allowed(void) current->mems_allowed = NODE_MASK_ALL; } -/* +/** + * cpuset_update_current_mems_allowed - update mems parameters to new values + * * If the current tasks cpusets mems_allowed changed behind our backs, * update current->mems_allowed and mems_generation to the new value. * Do not call this routine if in_interrupt(). @@ -1540,13 +1541,20 @@ void cpuset_update_current_mems_allowed(void) } } +/** + * cpuset_restrict_to_mems_allowed - limit nodes to current mems_allowed + * @nodes: pointer to a node bitmap that is and-ed with mems_allowed + */ void cpuset_restrict_to_mems_allowed(unsigned long *nodes) { bitmap_and(nodes, nodes, nodes_addr(current->mems_allowed), MAX_NUMNODES); } -/* +/** + * cpuset_zonelist_valid_mems_allowed - check zonelist vs. curremt mems_allowed + * @zl: the zonelist to be checked + * * Are any of the nodes on zonelist zl allowed in current->mems_allowed? */ int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl) @@ -1562,8 +1570,12 @@ int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl) return 0; } -/* - * Is 'current' valid, and is zone z allowed in current->mems_allowed? +/** + * cpuset_zone_allowed - is zone z allowed in current->mems_allowed + * @z: zone in question + * + * Is zone z allowed in current->mems_allowed, or is + * the CPU in interrupt context? (zone is always allowed in this case) */ int cpuset_zone_allowed(struct zone *z) { diff --git a/kernel/crash_dump.c b/kernel/crash_dump.c index 459ba49e376..334c37f5218 100644 --- a/kernel/crash_dump.c +++ b/kernel/crash_dump.c @@ -18,7 +18,16 @@ /* Stores the physical address of elf header of crash image. */ unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX; -/* +/** + * copy_oldmem_page - copy one page from "oldmem" + * @pfn: page frame number to be copied + * @buf: target memory address for the copy; this can be in kernel address + * space or user address space (see @userbuf) + * @csize: number of bytes to copy + * @offset: offset in bytes into the page (based on pfn) to begin the copy + * @userbuf: if set, @buf is in user address space, use copy_to_user(), + * otherwise @buf is in kernel address space, use memcpy(). + * * Copy a page from "oldmem". For this page, there is no pte mapped * in the current kernel. We stitch up a pte, similar to kmap_atomic. */ diff --git a/kernel/exit.c b/kernel/exit.c index 9d1b10ed013..5b0fb9f09f2 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -829,8 +829,10 @@ fastcall NORET_TYPE void do_exit(long code) acct_update_integrals(tsk); update_mem_hiwater(tsk); group_dead = atomic_dec_and_test(&tsk->signal->live); - if (group_dead) + if (group_dead) { + del_timer_sync(&tsk->signal->real_timer); acct_process(code); + } exit_mm(tsk); exit_sem(tsk); diff --git a/kernel/itimer.c b/kernel/itimer.c index a72cb0e5aa4..7c1b25e25e4 100644 --- a/kernel/itimer.c +++ b/kernel/itimer.c @@ -112,28 +112,11 @@ asmlinkage long sys_getitimer(int which, struct itimerval __user *value) return error; } -/* - * Called with P->sighand->siglock held and P->signal->real_timer inactive. - * If interval is nonzero, arm the timer for interval ticks from now. - */ -static inline void it_real_arm(struct task_struct *p, unsigned long interval) -{ - p->signal->it_real_value = interval; /* XXX unnecessary field?? */ - if (interval == 0) - return; - if (interval > (unsigned long) LONG_MAX) - interval = LONG_MAX; - /* the "+ 1" below makes sure that the timer doesn't go off before - * the interval requested. This could happen if - * time requested % (usecs per jiffy) is more than the usecs left - * in the current jiffy */ - p->signal->real_timer.expires = jiffies + interval + 1; - add_timer(&p->signal->real_timer); -} void it_real_fn(unsigned long __data) { struct task_struct * p = (struct task_struct *) __data; + unsigned long inc = p->signal->it_real_incr; send_group_sig_info(SIGALRM, SEND_SIG_PRIV, p); @@ -141,14 +124,23 @@ void it_real_fn(unsigned long __data) * Now restart the timer if necessary. We don't need any locking * here because do_setitimer makes sure we have finished running * before it touches anything. + * Note, we KNOW we are (or should be) at a jiffie edge here so + * we don't need the +1 stuff. Also, we want to use the prior + * expire value so as to not "slip" a jiffie if we are late. + * Deal with requesting a time prior to "now" here rather than + * in add_timer. */ - it_real_arm(p, p->signal->it_real_incr); + if (!inc) + return; + while (time_before_eq(p->signal->real_timer.expires, jiffies)) + p->signal->real_timer.expires += inc; + add_timer(&p->signal->real_timer); } int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue) { struct task_struct *tsk = current; - unsigned long val, interval; + unsigned long val, interval, expires; cputime_t cval, cinterval, nval, ninterval; switch (which) { @@ -164,7 +156,10 @@ again: } tsk->signal->it_real_incr = timeval_to_jiffies(&value->it_interval); - it_real_arm(tsk, timeval_to_jiffies(&value->it_value)); + expires = timeval_to_jiffies(&value->it_value); + if (expires) + mod_timer(&tsk->signal->real_timer, + jiffies + 1 + expires); spin_unlock_irq(&tsk->sighand->siglock); if (ovalue) { jiffies_to_timeval(val, &ovalue->it_value); diff --git a/kernel/module.c b/kernel/module.c index 068e271ab3a..c32995fbd8f 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -250,13 +250,18 @@ static inline unsigned int block_size(int val) /* Created by linker magic */ extern char __per_cpu_start[], __per_cpu_end[]; -static void *percpu_modalloc(unsigned long size, unsigned long align) +static void *percpu_modalloc(unsigned long size, unsigned long align, + const char *name) { unsigned long extra; unsigned int i; void *ptr; - BUG_ON(align > SMP_CACHE_BYTES); + if (align > SMP_CACHE_BYTES) { + printk(KERN_WARNING "%s: per-cpu alignment %li > %i\n", + name, align, SMP_CACHE_BYTES); + align = SMP_CACHE_BYTES; + } ptr = __per_cpu_start; for (i = 0; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) { @@ -348,7 +353,8 @@ static int percpu_modinit(void) } __initcall(percpu_modinit); #else /* ... !CONFIG_SMP */ -static inline void *percpu_modalloc(unsigned long size, unsigned long align) +static inline void *percpu_modalloc(unsigned long size, unsigned long align, + const char *name) { return NULL; } @@ -1644,7 +1650,8 @@ static struct module *load_module(void __user *umod, if (pcpuindex) { /* We have a special allocation for this section. */ percpu = percpu_modalloc(sechdrs[pcpuindex].sh_size, - sechdrs[pcpuindex].sh_addralign); + sechdrs[pcpuindex].sh_addralign, + mod->name); if (!percpu) { err = -ENOMEM; goto free_mod; diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c index 5b7b4736d82..38798a2ff99 100644 --- a/kernel/posix-timers.c +++ b/kernel/posix-timers.c @@ -896,21 +896,10 @@ static int adjust_abs_time(struct k_clock *clock, struct timespec *tp, jiffies_64_f = get_jiffies_64(); } /* - * Take away now to get delta + * Take away now to get delta and normalize */ - oc.tv_sec -= now.tv_sec; - oc.tv_nsec -= now.tv_nsec; - /* - * Normalize... - */ - while ((oc.tv_nsec - NSEC_PER_SEC) >= 0) { - oc.tv_nsec -= NSEC_PER_SEC; - oc.tv_sec++; - } - while ((oc.tv_nsec) < 0) { - oc.tv_nsec += NSEC_PER_SEC; - oc.tv_sec--; - } + set_normalized_timespec(&oc, oc.tv_sec - now.tv_sec, + oc.tv_nsec - now.tv_nsec); }else{ jiffies_64_f = get_jiffies_64(); } @@ -1177,7 +1166,6 @@ void exit_itimers(struct signal_struct *sig) tmr = list_entry(sig->posix_timers.next, struct k_itimer, list); itimer_delete(tmr); } - del_timer_sync(&sig->real_timer); } /* diff --git a/kernel/power/smp.c b/kernel/power/smp.c index bbe23079c62..911fc62b822 100644 --- a/kernel/power/smp.c +++ b/kernel/power/smp.c @@ -38,7 +38,7 @@ void disable_nonboot_cpus(void) } printk("Error taking cpu %d down: %d\n", cpu, error); } - BUG_ON(smp_processor_id() != 0); + BUG_ON(raw_smp_processor_id() != 0); if (error) panic("cpus not sleeping"); } diff --git a/kernel/sys.c b/kernel/sys.c index a74039036fb..0bcaed6560a 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -371,7 +371,6 @@ void kernel_restart(char *cmd) { notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd); system_state = SYSTEM_RESTART; - device_suspend(PMSG_FREEZE); device_shutdown(); if (!cmd) { printk(KERN_EMERG "Restarting system.\n"); @@ -393,7 +392,6 @@ void kernel_kexec(void) } notifier_call_chain(&reboot_notifier_list, SYS_RESTART, NULL); system_state = SYSTEM_RESTART; - device_suspend(PMSG_FREEZE); device_shutdown(); printk(KERN_EMERG "Starting new kernel\n"); machine_shutdown(); @@ -406,7 +404,6 @@ void kernel_halt(void) { notifier_call_chain(&reboot_notifier_list, SYS_HALT, NULL); system_state = SYSTEM_HALT; - device_suspend(PMSG_SUSPEND); device_shutdown(); printk(KERN_EMERG "System halted.\n"); machine_halt(); @@ -417,7 +414,6 @@ void kernel_power_off(void) { notifier_call_chain(&reboot_notifier_list, SYS_POWER_OFF, NULL); system_state = SYSTEM_POWER_OFF; - device_suspend(PMSG_SUSPEND); device_shutdown(); printk(KERN_EMERG "Power down.\n"); machine_power_off(); diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c index 42b40ae5ead..1ab2370e2ef 100644 --- a/kernel/sys_ni.c +++ b/kernel/sys_ni.c @@ -79,7 +79,6 @@ cond_syscall(sys_request_key); cond_syscall(sys_keyctl); cond_syscall(compat_sys_keyctl); cond_syscall(compat_sys_socketcall); -cond_syscall(sys_set_zone_reclaim); cond_syscall(sys_inotify_init); cond_syscall(sys_inotify_add_watch); cond_syscall(sys_inotify_rm_watch); diff --git a/kernel/sysctl.c b/kernel/sysctl.c index e60b9c36f1f..3e0bbee549e 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -114,6 +114,7 @@ extern int unaligned_enabled; extern int sysctl_ieee_emulation_warnings; #endif extern int sysctl_userprocess_debug; +extern int spin_retry; #endif extern int sysctl_hz_timer; @@ -647,7 +648,16 @@ static ctl_table kern_table[] = { .mode = 0644, .proc_handler = &proc_dointvec, }, - +#if defined(CONFIG_ARCH_S390) + { + .ctl_name = KERN_SPIN_RETRY, + .procname = "spin_retry", + .data = &spin_retry, + .maxlen = sizeof (int), + .mode = 0644, + .proc_handler = &proc_dointvec, + }, +#endif { .ctl_name = 0 } }; diff --git a/kernel/time.c b/kernel/time.c index d4335c1c884..dd5ae1162a8 100644 --- a/kernel/time.c +++ b/kernel/time.c @@ -128,7 +128,7 @@ asmlinkage long sys_gettimeofday(struct timeval __user *tv, struct timezone __us * as real UNIX machines always do it. This avoids all headaches about * daylight saving times and warping kernel clocks. */ -inline static void warp_clock(void) +static inline void warp_clock(void) { write_seqlock_irq(&xtime_lock); wall_to_monotonic.tv_sec -= sys_tz.tz_minuteswest * 60; |