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lockdep: handle chains involving classes defined in modules

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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>
This commit is contained in:
Rabin Vincent
2008-08-11 09:30:26 +02:00
committed by Ingo Molnar
parent 7cd5a02f54
commit 8bfe0298f7
2 changed files with 4 additions and 0 deletions
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1
kernel/lockdep.c
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@@ -3176,6 +3176,7 @@ static void zap_class(struct lock_class *class)
list_del_rcu(&class->hash_entry); list_del_rcu(&class->hash_entry);
list_del_rcu(&class->lock_entry); list_del_rcu(&class->lock_entry);
class->key = NULL;
} }
static inline int within(const void *addr, void *start, unsigned long size) static inline int within(const void *addr, void *start, unsigned long size)

3
kernel/lockdep_proc.c
View File

@@ -201,6 +201,9 @@ static int lc_show(struct seq_file *m, void *v)
for (i = 0; i < chain->depth; i++) { for (i = 0; i < chain->depth; i++) {
class = lock_chain_get_class(chain, i); class = lock_chain_get_class(chain, i);
if (!class->key)
continue;
seq_printf(m, "[%p] ", class->key); seq_printf(m, "[%p] ", class->key);
print_name(m, class); print_name(m, class);
seq_puts(m, "\n"); seq_puts(m, "\n");