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-rw-r--r--kernel/timer.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/timer.c b/kernel/timer.c
index 4dd9a10d67d0..b761898d04c8 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);