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authorIngo Molnar <mingo@elte.hu>2006-03-07 23:51:39 -0800
committerAl Viro <viro@zeniv.linux.org.uk>2006-03-20 14:08:55 -0500
commit4023e020807ea249ae83f0d1d851b4c7cf0afd8a (patch)
tree3bc91756c9429bd89c2ebb47108ed772dd29c4cf /kernel/auditsc.c
parentd9d9ec6e2c45b22282cd36cf92fcb23d504350a8 (diff)
downloadop-kernel-dev-4023e020807ea249ae83f0d1d851b4c7cf0afd8a.zip
op-kernel-dev-4023e020807ea249ae83f0d1d851b4c7cf0afd8a.tar.gz
[PATCH] simplify audit_free() locking
Simplify audit_free()'s locking: no need to lock a task that we are tearing down. [the extra locking also caused false positives in the lock validator] Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/auditsc.c')
-rw-r--r--kernel/auditsc.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index d3d4992..b613ec8 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -704,10 +704,14 @@ void audit_free(struct task_struct *tsk)
{
struct audit_context *context;
- task_lock(tsk);
+ /*
+ * No need to lock the task - when we execute audit_free()
+ * then the task has no external references anymore, and
+ * we are tearing it down. (The locking also confuses
+ * DEBUG_LOCKDEP - this freeing may occur in softirq
+ * contexts as well, via RCU.)
+ */
context = audit_get_context(tsk, 0, 0);
- task_unlock(tsk);
-
if (likely(!context))
return;
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