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authorIngo Molnar <mingo@elte.hu>2006-07-03 00:25:10 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-03 15:27:07 -0700
commitd730e882a15c38de02b63a063be636b2ff9e9ed1 (patch)
tree89e45dd870d7de3f50b487e87cf0ec1135f912dd /kernel
parent06825ba3553151eea24206bc53d4fc3de49e0ab1 (diff)
downloadop-kernel-dev-d730e882a15c38de02b63a063be636b2ff9e9ed1.zip
op-kernel-dev-d730e882a15c38de02b63a063be636b2ff9e9ed1.tar.gz
[PATCH] lockdep: annotate timer base locks
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>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/timer.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/timer.c b/kernel/timer.c
index 4dd9a10..b761898 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1559,6 +1559,13 @@ asmlinkage long sys_sysinfo(struct sysinfo __user *info)
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)
{
int j;
@@ -1594,6 +1601,8 @@ static int __devinit init_timers_cpu(int cpu)
}
spin_lock_init(&base->lock);
+ lockdep_set_class(&base->lock, base_lock_keys + cpu);
+
for (j = 0; j < TVN_SIZE; j++) {
INIT_LIST_HEAD(base->tv5.vec + j);
INIT_LIST_HEAD(base->tv4.vec + j);
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