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Diffstat (limited to 'kernel')
-rw-r--r--kernel/cgroup.c3
-rw-r--r--kernel/futex.c24
-rw-r--r--kernel/kgdb.c4
-rw-r--r--kernel/kprobes.c31
-rw-r--r--kernel/lockdep_internals.h4
-rw-r--r--kernel/panic.c35
-rw-r--r--kernel/power/disk.c4
-rw-r--r--kernel/sched_clock.c3
-rw-r--r--kernel/sysctl.c23
-rw-r--r--kernel/trace/trace.c2
10 files changed, 65 insertions, 68 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 382109b5bae..a7267bfd376 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1133,8 +1133,7 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
free_cg_links:
free_cg_links(&tmp_cg_links);
drop_new_super:
- up_write(&sb->s_umount);
- deactivate_super(sb);
+ deactivate_locked_super(sb);
return ret;
}
diff --git a/kernel/futex.c b/kernel/futex.c
index eef8cd26b5e..d546b2d53a6 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -193,6 +193,7 @@ static void drop_futex_key_refs(union futex_key *key)
* @uaddr: virtual address of the futex
* @fshared: 0 for a PROCESS_PRIVATE futex, 1 for PROCESS_SHARED
* @key: address where result is stored.
+ * @rw: mapping needs to be read/write (values: VERIFY_READ, VERIFY_WRITE)
*
* Returns a negative error code or 0
* The key words are stored in *key on success.
@@ -203,7 +204,8 @@ static void drop_futex_key_refs(union futex_key *key)
*
* lock_page() might sleep, the caller should not hold a spinlock.
*/
-static int get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key)
+static int
+get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, int rw)
{
unsigned long address = (unsigned long)uaddr;
struct mm_struct *mm = current->mm;
@@ -226,7 +228,7 @@ static int get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key)
* but access_ok() should be faster than find_vma()
*/
if (!fshared) {
- if (unlikely(!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))))
+ if (unlikely(!access_ok(rw, uaddr, sizeof(u32))))
return -EFAULT;
key->private.mm = mm;
key->private.address = address;
@@ -235,7 +237,7 @@ static int get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key)
}
again:
- err = get_user_pages_fast(address, 1, 0, &page);
+ err = get_user_pages_fast(address, 1, rw == VERIFY_WRITE, &page);
if (err < 0)
return err;
@@ -677,7 +679,7 @@ static int futex_wake(u32 __user *uaddr, int fshared, int nr_wake, u32 bitset)
if (!bitset)
return -EINVAL;
- ret = get_futex_key(uaddr, fshared, &key);
+ ret = get_futex_key(uaddr, fshared, &key, VERIFY_READ);
if (unlikely(ret != 0))
goto out;
@@ -723,10 +725,10 @@ futex_wake_op(u32 __user *uaddr1, int fshared, u32 __user *uaddr2,
int ret, op_ret;
retry:
- ret = get_futex_key(uaddr1, fshared, &key1);
+ ret = get_futex_key(uaddr1, fshared, &key1, VERIFY_READ);
if (unlikely(ret != 0))
goto out;
- ret = get_futex_key(uaddr2, fshared, &key2);
+ ret = get_futex_key(uaddr2, fshared, &key2, VERIFY_WRITE);
if (unlikely(ret != 0))
goto out_put_key1;
@@ -814,10 +816,10 @@ static int futex_requeue(u32 __user *uaddr1, int fshared, u32 __user *uaddr2,
int ret, drop_count = 0;
retry:
- ret = get_futex_key(uaddr1, fshared, &key1);
+ ret = get_futex_key(uaddr1, fshared, &key1, VERIFY_READ);
if (unlikely(ret != 0))
goto out;
- ret = get_futex_key(uaddr2, fshared, &key2);
+ ret = get_futex_key(uaddr2, fshared, &key2, VERIFY_READ);
if (unlikely(ret != 0))
goto out_put_key1;
@@ -1140,7 +1142,7 @@ static int futex_wait(u32 __user *uaddr, int fshared,
q.bitset = bitset;
retry:
q.key = FUTEX_KEY_INIT;
- ret = get_futex_key(uaddr, fshared, &q.key);
+ ret = get_futex_key(uaddr, fshared, &q.key, VERIFY_READ);
if (unlikely(ret != 0))
goto out;
@@ -1330,7 +1332,7 @@ static int futex_lock_pi(u32 __user *uaddr, int fshared,
q.pi_state = NULL;
retry:
q.key = FUTEX_KEY_INIT;
- ret = get_futex_key(uaddr, fshared, &q.key);
+ ret = get_futex_key(uaddr, fshared, &q.key, VERIFY_WRITE);
if (unlikely(ret != 0))
goto out;
@@ -1594,7 +1596,7 @@ retry:
if ((uval & FUTEX_TID_MASK) != task_pid_vnr(current))
return -EPERM;
- ret = get_futex_key(uaddr, fshared, &key);
+ ret = get_futex_key(uaddr, fshared, &key, VERIFY_WRITE);
if (unlikely(ret != 0))
goto out;
diff --git a/kernel/kgdb.c b/kernel/kgdb.c
index e4dcfb2272a..9147a3190c9 100644
--- a/kernel/kgdb.c
+++ b/kernel/kgdb.c
@@ -1583,8 +1583,8 @@ static void sysrq_handle_gdb(int key, struct tty_struct *tty)
static struct sysrq_key_op sysrq_gdb_op = {
.handler = sysrq_handle_gdb,
- .help_msg = "Gdb",
- .action_msg = "GDB",
+ .help_msg = "debug(G)",
+ .action_msg = "DEBUG",
};
#endif
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index a5e74ddee0e..c0fa54b276d 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -319,6 +319,22 @@ struct kprobe __kprobes *get_kprobe(void *addr)
return NULL;
}
+/* Arm a kprobe with text_mutex */
+static void __kprobes arm_kprobe(struct kprobe *kp)
+{
+ mutex_lock(&text_mutex);
+ arch_arm_kprobe(kp);
+ mutex_unlock(&text_mutex);
+}
+
+/* Disarm a kprobe with text_mutex */
+static void __kprobes disarm_kprobe(struct kprobe *kp)
+{
+ mutex_lock(&text_mutex);
+ arch_disarm_kprobe(kp);
+ mutex_unlock(&text_mutex);
+}
+
/*
* Aggregate handlers for multiple kprobes support - these handlers
* take care of invoking the individual kprobe handlers on p->list
@@ -538,7 +554,7 @@ static int __kprobes add_new_kprobe(struct kprobe *ap, struct kprobe *p)
ap->flags &= ~KPROBE_FLAG_DISABLED;
if (!kprobes_all_disarmed)
/* Arm the breakpoint again. */
- arch_arm_kprobe(ap);
+ arm_kprobe(ap);
}
return 0;
}
@@ -789,11 +805,8 @@ static int __kprobes __unregister_kprobe_top(struct kprobe *p)
* enabled and not gone - otherwise, the breakpoint would
* already have been removed. We save on flushing icache.
*/
- if (!kprobes_all_disarmed && !kprobe_disabled(old_p)) {
- mutex_lock(&text_mutex);
- arch_disarm_kprobe(p);
- mutex_unlock(&text_mutex);
- }
+ if (!kprobes_all_disarmed && !kprobe_disabled(old_p))
+ disarm_kprobe(p);
hlist_del_rcu(&old_p->hlist);
} else {
if (p->break_handler && !kprobe_gone(p))
@@ -810,7 +823,7 @@ noclean:
if (!kprobe_disabled(old_p)) {
try_to_disable_aggr_kprobe(old_p);
if (!kprobes_all_disarmed && kprobe_disabled(old_p))
- arch_disarm_kprobe(old_p);
+ disarm_kprobe(old_p);
}
}
return 0;
@@ -1364,7 +1377,7 @@ int __kprobes disable_kprobe(struct kprobe *kp)
try_to_disable_aggr_kprobe(p);
if (!kprobes_all_disarmed && kprobe_disabled(p))
- arch_disarm_kprobe(p);
+ disarm_kprobe(p);
out:
mutex_unlock(&kprobe_mutex);
return ret;
@@ -1393,7 +1406,7 @@ int __kprobes enable_kprobe(struct kprobe *kp)
}
if (!kprobes_all_disarmed && kprobe_disabled(p))
- arch_arm_kprobe(p);
+ arm_kprobe(p);
p->flags &= ~KPROBE_FLAG_DISABLED;
if (p != kp)
diff --git a/kernel/lockdep_internals.h b/kernel/lockdep_internals.h
index a2cc7e9a6e8..699a2ac3a0d 100644
--- a/kernel/lockdep_internals.h
+++ b/kernel/lockdep_internals.h
@@ -54,9 +54,9 @@ enum {
* table (if it's not there yet), and we check it for lock order
* conflicts and deadlocks.
*/
-#define MAX_LOCKDEP_ENTRIES 8192UL
+#define MAX_LOCKDEP_ENTRIES 16384UL
-#define MAX_LOCKDEP_CHAINS_BITS 14
+#define MAX_LOCKDEP_CHAINS_BITS 15
#define MAX_LOCKDEP_CHAINS (1UL << MAX_LOCKDEP_CHAINS_BITS)
#define MAX_LOCKDEP_CHAIN_HLOCKS (MAX_LOCKDEP_CHAINS*5)
diff --git a/kernel/panic.c b/kernel/panic.c
index 874ecf1307a..984b3ecbd72 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -340,39 +340,44 @@ void oops_exit(void)
}
#ifdef WANT_WARN_ON_SLOWPATH
-void warn_slowpath_fmt(const char *file, int line, const char *fmt, ...)
-{
+struct slowpath_args {
+ const char *fmt;
va_list args;
- char function[KSYM_SYMBOL_LEN];
- unsigned long caller = (unsigned long)__builtin_return_address(0);
- const char *board;
+};
- sprint_symbol(function, caller);
+static void warn_slowpath_common(const char *file, int line, void *caller, struct slowpath_args *args)
+{
+ const char *board;
printk(KERN_WARNING "------------[ cut here ]------------\n");
- printk(KERN_WARNING "WARNING: at %s:%d %s()\n", file,
- line, function);
+ printk(KERN_WARNING "WARNING: at %s:%d %pS()\n", file, line, caller);
board = dmi_get_system_info(DMI_PRODUCT_NAME);
if (board)
printk(KERN_WARNING "Hardware name: %s\n", board);
- if (*fmt) {
- va_start(args, fmt);
- vprintk(fmt, args);
- va_end(args);
- }
+ if (args)
+ vprintk(args->fmt, args->args);
print_modules();
dump_stack();
print_oops_end_marker();
add_taint(TAINT_WARN);
}
+
+void warn_slowpath_fmt(const char *file, int line, const char *fmt, ...)
+{
+ struct slowpath_args args;
+
+ args.fmt = fmt;
+ va_start(args.args, fmt);
+ warn_slowpath_common(file, line, __builtin_return_address(0), &args);
+ va_end(args.args);
+}
EXPORT_SYMBOL(warn_slowpath_fmt);
void warn_slowpath_null(const char *file, int line)
{
- static const char *empty = "";
- warn_slowpath_fmt(file, line, empty);
+ warn_slowpath_common(file, line, __builtin_return_address(0), NULL);
}
EXPORT_SYMBOL(warn_slowpath_null);
#endif
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index e71ca9cd81b..b0dc9e7a0d1 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -241,9 +241,9 @@ static int create_image(int platform_mode)
local_irq_disable();
- sysdev_suspend(PMSG_FREEZE);
+ error = sysdev_suspend(PMSG_FREEZE);
if (error) {
- printk(KERN_ERR "PM: Some devices failed to power down, "
+ printk(KERN_ERR "PM: Some system devices failed to power down, "
"aborting hibernation\n");
goto Enable_irqs;
}
diff --git a/kernel/sched_clock.c b/kernel/sched_clock.c
index 819f17ac796..e1d16c9a768 100644
--- a/kernel/sched_clock.c
+++ b/kernel/sched_clock.c
@@ -38,7 +38,8 @@
*/
unsigned long long __attribute__((weak)) sched_clock(void)
{
- return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ);
+ return (unsigned long long)(jiffies - INITIAL_JIFFIES)
+ * (NSEC_PER_SEC / HZ);
}
static __read_mostly int sched_clock_running;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 98ecf35d5bf..149581fb48a 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -101,7 +101,6 @@ static int __maybe_unused one = 1;
static int __maybe_unused two = 2;
static unsigned long one_ul = 1;
static int one_hundred = 100;
-static int one_thousand = 1000;
/* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
static unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
@@ -1046,28 +1045,6 @@ static struct ctl_table vm_table[] = {
.proc_handler = &proc_dointvec,
},
{
- .ctl_name = CTL_UNNUMBERED,
- .procname = "nr_pdflush_threads_min",
- .data = &nr_pdflush_threads_min,
- .maxlen = sizeof nr_pdflush_threads_min,
- .mode = 0644 /* read-write */,
- .proc_handler = &proc_dointvec_minmax,
- .strategy = &sysctl_intvec,
- .extra1 = &one,
- .extra2 = &nr_pdflush_threads_max,
- },
- {
- .ctl_name = CTL_UNNUMBERED,
- .procname = "nr_pdflush_threads_max",
- .data = &nr_pdflush_threads_max,
- .maxlen = sizeof nr_pdflush_threads_max,
- .mode = 0644 /* read-write */,
- .proc_handler = &proc_dointvec_minmax,
- .strategy = &sysctl_intvec,
- .extra1 = &nr_pdflush_threads_min,
- .extra2 = &one_thousand,
- },
- {
.ctl_name = VM_SWAPPINESS,
.procname = "swappiness",
.data = &vm_swappiness,
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a884c09006c..cda81ec58d9 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2380,7 +2380,7 @@ static const char readme_msg[] =
"# echo print-parent > /debug/tracing/trace_options\n"
"# echo 1 > /debug/tracing/tracing_enabled\n"
"# cat /debug/tracing/trace > /tmp/trace.txt\n"
- "echo 0 > /debug/tracing/tracing_enabled\n"
+ "# echo 0 > /debug/tracing/tracing_enabled\n"
;
static ssize_t
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-31 18:14:17 +0000