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authorPeter Zijlstra <peterz@infradead.org>2018-07-31 14:35:32 +0200
committerIngo Molnar <mingo@kernel.org>2018-09-10 10:16:38 +0200
commitcb538267ea1e9e025ec692577c9ae75797261889 (patch)
treec64b201dc8a6977b1ac91ef85ca0b828c99ff33a /kernel/jump_label.c
parentce991095ccdf83ab4af7b4f5de0c8d3306fb97bf (diff)
downloadlwn-cb538267ea1e9e025ec692577c9ae75797261889.tar.gz
lwn-cb538267ea1e9e025ec692577c9ae75797261889.zip
jump_label/lockdep: Assert we hold the hotplug lock for _cpuslocked() operations
Weirdly we seem to have forgotten this... Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/jump_label.c')
-rw-r--r--kernel/jump_label.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/jump_label.c b/kernel/jump_label.c
index de97d8753b62..966a9e9c0f04 100644
--- a/kernel/jump_label.c
+++ b/kernel/jump_label.c
@@ -85,6 +85,7 @@ void static_key_slow_inc_cpuslocked(struct static_key *key)
int v, v1;
STATIC_KEY_CHECK_USE(key);
+ lockdep_assert_cpus_held();
/*
* Careful if we get concurrent static_key_slow_inc() calls;
@@ -130,6 +131,7 @@ EXPORT_SYMBOL_GPL(static_key_slow_inc);
void static_key_enable_cpuslocked(struct static_key *key)
{
STATIC_KEY_CHECK_USE(key);
+ lockdep_assert_cpus_held();
if (atomic_read(&key->enabled) > 0) {
WARN_ON_ONCE(atomic_read(&key->enabled) != 1);
@@ -160,6 +162,7 @@ EXPORT_SYMBOL_GPL(static_key_enable);
void static_key_disable_cpuslocked(struct static_key *key)
{
STATIC_KEY_CHECK_USE(key);
+ lockdep_assert_cpus_held();
if (atomic_read(&key->enabled) != 1) {
WARN_ON_ONCE(atomic_read(&key->enabled) != 0);
@@ -185,6 +188,8 @@ static void __static_key_slow_dec_cpuslocked(struct static_key *key,
unsigned long rate_limit,
struct delayed_work *work)
{
+ lockdep_assert_cpus_held();
+
/*
* The negative count check is valid even when a negative
* key->enabled is in use by static_key_slow_inc(); a