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[PATCH] lockdep: annotate timer base locks

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Split the per-CPU timer base locks up into separate lock classes, because they
are used recursively.

Has no effect on non-lockdep kernels.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar 2006-07-03 00:25:10 -07:00 committed by Linus Torvalds
parent 06825ba355
commit d730e882a1
1 changed files with 9 additions and 0 deletions
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9
kernel/timer.c
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@ -1559,6 +1559,13 @@ asmlinkage long sys_sysinfo(struct sysinfo __user *info)
return 0; return 0;
} }
/*
* lockdep: we want to track each per-CPU base as a separate lock-class,
* but timer-bases are kmalloc()-ed, so we need to attach separate
* keys to them:
*/
static struct lock_class_key base_lock_keys[NR_CPUS];
static int __devinit init_timers_cpu(int cpu) static int __devinit init_timers_cpu(int cpu)
{ {
int j; int j;
@ -1594,6 +1601,8 @@ static int __devinit init_timers_cpu(int cpu)
} }
spin_lock_init(&base->lock); spin_lock_init(&base->lock);
lockdep_set_class(&base->lock, base_lock_keys + cpu);
for (j = 0; j < TVN_SIZE; j++) { for (j = 0; j < TVN_SIZE; j++) {
INIT_LIST_HEAD(base->tv5.vec + j); INIT_LIST_HEAD(base->tv5.vec + j);
INIT_LIST_HEAD(base->tv4.vec + j); INIT_LIST_HEAD(base->tv4.vec + j);