diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2010-02-23 04:04:47 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-02-25 11:41:01 +0300 |
| commit | 0632eb3d7563d6a76d49a3860b6352d800c92854 (patch) | |
| tree | d998e6d4292a21a91ba1333ffdb1866daf1cfee2 /include | |
| parent | c26d34a5858f96a564c45048bf5f09319d2abad1 (diff) | |
| download | linux-0632eb3d7563d6a76d49a3860b6352d800c92854.tar.xz | |
rcu: Integrate rcu_dereference_check() message into lockdep
Make rcu_dereference_check() print the list of held locks in
addition to the stack dump to ease debugging.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: mathieu.desnoyers@polymtl.ca
Cc: josh@joshtriplett.org
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
Cc: Valdis.Kletnieks@vt.edu
Cc: dhowells@redhat.com
LKML-Reference: <1266887105-1528-3-git-send-email-paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/lockdep.h | 4 | ||||
| -rw-r--r-- | include/linux/rcupdate.h | 4 |
2 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index 9ccf0e286b2a..10206a87da19 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -534,4 +534,8 @@ do { \ # define might_lock_read(lock) do { } while (0) #endif +#ifdef CONFIG_PROVE_RCU +extern void lockdep_rcu_dereference(const char *file, const int line); +#endif + #endif /* __LINUX_LOCKDEP_H */ diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index 839d296a7ac0..1a4de31bd7b4 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -182,8 +182,8 @@ static inline int rcu_read_lock_sched_held(void) */ #define rcu_dereference_check(p, c) \ ({ \ - if (debug_locks) \ - WARN_ON_ONCE(!(c)); \ + if (debug_locks && !(c)) \ + lockdep_rcu_dereference(__FILE__, __LINE__); \ rcu_dereference_raw(p); \ }) |