From: Peter Zijlstra Date: Tue, 31 Jul 2018 12:35:32 +0000 (+0200) Subject: jump_label/lockdep: Assert we hold the hotplug lock for _cpuslocked() operations X-Git-Tag: v4.20-rc1~170^2~26 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=cb538267ea1e;p=thirdparty%2Flinux.git 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) Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Signed-off-by: Ingo Molnar --- diff --git a/kernel/jump_label.c b/kernel/jump_label.c index de97d8753b62a..966a9e9c0f04a 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