diff options
| author | Bart Van Assche <bvanassche@acm.org> | 2019-03-03 19:19:01 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-03-09 14:15:51 +0100 |
| commit | 0126574fca2ce0f0d5beb9dade6efb823ff7407b (patch) | |
| tree | 835d78cfc847b097cbe8a62d44962e28d28ee769 /kernel | |
| parent | locking/lockdep: Avoid a Clang warning (diff) | |
| download | linux-0126574fca2ce0f0d5beb9dade6efb823ff7407b.tar.xz linux-0126574fca2ce0f0d5beb9dade6efb823ff7407b.zip | |
locking/lockdep: Only call init_rcu_head() after RCU has been initialized
init_data_structures_once() is called for the first time before RCU has
been initialized. Make sure that init_rcu_head() is called before the
RCU head is used and after RCU has been initialized.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: longman@redhat.com
Link: https://lkml.kernel.org/r/c20aa0f0-42ab-a884-d931-7d4ec2bf0cdc@acm.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/locking/lockdep.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 35a144dfddf5..34cdcbedda49 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -982,15 +982,22 @@ static inline void check_data_structures(void) { } */ static void init_data_structures_once(void) { - static bool initialization_happened; + static bool ds_initialized, rcu_head_initialized; int i; - if (likely(initialization_happened)) + if (likely(rcu_head_initialized)) return; - initialization_happened = true; + if (system_state >= SYSTEM_SCHEDULING) { + init_rcu_head(&delayed_free.rcu_head); + rcu_head_initialized = true; + } + + if (ds_initialized) + return; + + ds_initialized = true; - init_rcu_head(&delayed_free.rcu_head); INIT_LIST_HEAD(&delayed_free.pf[0].zapped); INIT_LIST_HEAD(&delayed_free.pf[1].zapped); |