diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2007-10-11 22:11:12 +0200 |
|---|---|---|
| committer | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2007-10-11 22:11:12 +0200 |
| commit | 851a67b825540a8e00c0be3ee25e4627ba8b133b (patch) | |
| tree | 07afd72ad74a392cb30cefcd01acdfd9b01282d3 /include/linux/rcupdate.h | |
| parent | 34a3d1e83708702ac6cb872215e68cd07dae298b (diff) | |
| download | lwn-851a67b825540a8e00c0be3ee25e4627ba8b133b.tar.gz lwn-851a67b825540a8e00c0be3ee25e4627ba8b133b.zip | |
lockdep: annotate rcu_read_{,un}lock{,_bh}
lockdep annotate rcu_read_{,un}lock{,_bh} in order to catch imbalanced
usage.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'include/linux/rcupdate.h')
| -rw-r--r-- | include/linux/rcupdate.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index fe17d7d750c2..76c1a530edc5 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -41,6 +41,7 @@ #include <linux/percpu.h> #include <linux/cpumask.h> #include <linux/seqlock.h> +#include <linux/lockdep.h> /** * struct rcu_head - callback structure for use with RCU @@ -133,6 +134,15 @@ static inline void rcu_bh_qsctr_inc(int cpu) extern int rcu_pending(int cpu); extern int rcu_needs_cpu(int cpu); +#ifdef CONFIG_DEBUG_LOCK_ALLOC +extern struct lockdep_map rcu_lock_map; +# define rcu_read_acquire() lock_acquire(&rcu_lock_map, 0, 0, 2, 1, _THIS_IP_) +# define rcu_read_release() lock_release(&rcu_lock_map, 1, _THIS_IP_) +#else +# define rcu_read_acquire() do { } while (0) +# define rcu_read_release() do { } while (0) +#endif + /** * rcu_read_lock - mark the beginning of an RCU read-side critical section. * @@ -166,6 +176,7 @@ extern int rcu_needs_cpu(int cpu); do { \ preempt_disable(); \ __acquire(RCU); \ + rcu_read_acquire(); \ } while(0) /** @@ -175,6 +186,7 @@ extern int rcu_needs_cpu(int cpu); */ #define rcu_read_unlock() \ do { \ + rcu_read_release(); \ __release(RCU); \ preempt_enable(); \ } while(0) @@ -204,6 +216,7 @@ extern int rcu_needs_cpu(int cpu); do { \ local_bh_disable(); \ __acquire(RCU_BH); \ + rcu_read_acquire(); \ } while(0) /* @@ -213,6 +226,7 @@ extern int rcu_needs_cpu(int cpu); */ #define rcu_read_unlock_bh() \ do { \ + rcu_read_release(); \ __release(RCU_BH); \ local_bh_enable(); \ } while(0) |