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| author | Rabin Vincent <rabin@rab.in> | 2008-08-11 09:30:26 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-08-11 09:30:26 +0200 |
| commit | 8bfe0298f7a04952d19f4a2cf510d7a6311eeed0 (patch) | |
| tree | f90c216c26c0d73128a713d5142ccaefa2dce353 | |
| parent | mm: fix mm_take_all_locks() locking order (diff) | |
| download | linux-8bfe0298f7a04952d19f4a2cf510d7a6311eeed0.tar.xz linux-8bfe0298f7a04952d19f4a2cf510d7a6311eeed0.zip | |
lockdep: handle chains involving classes defined in modules
Solve this by marking the classes as unused and not printing information
about the unused classes.
Reported-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Rabin Vincent <rabin@rab.in>
Acked-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | kernel/lockdep.c | 1 | ||||
| -rw-r--r-- | kernel/lockdep_proc.c | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/kernel/lockdep.c b/kernel/lockdep.c index 410c3365ad8f..ab933fecd2a1 100644 --- a/kernel/lockdep.c +++ b/kernel/lockdep.c @@ -3176,6 +3176,7 @@ static void zap_class(struct lock_class *class) list_del_rcu(&class->hash_entry); list_del_rcu(&class->lock_entry); + class->key = NULL; } static inline int within(const void *addr, void *start, unsigned long size) diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c index 6252ff799d19..fa19aee604c2 100644 --- a/kernel/lockdep_proc.c +++ b/kernel/lockdep_proc.c @@ -201,6 +201,9 @@ static int lc_show(struct seq_file *m, void *v) for (i = 0; i < chain->depth; i++) { class = lock_chain_get_class(chain, i); + if (!class->key) + continue; + seq_printf(m, "[%p] ", class->key); print_name(m, class); seq_puts(m, "\n"); |