BackPup/Linux
1
0 Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-10-07 22:37:45 -04:00
Code Issues Packages Projects Releases Wiki Activity

jump_label/lockdep: Assert we hold the hotplug lock for _cpuslocked() operations

Browse Source 
Weirdly we seem to have forgotten this...

Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Peter Zijlstra authored and Ingo Molnar committed 2018-09-10 10:16:38 +02:00
1 parent ce991095cc
commit cb538267ea
1 file changed
+5
Download Patch File Download Diff File Expand all files Collapse all files
kernel/jump_label.c
+5
View File
@@ -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