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authorOleg Nesterov <oleg@tv-sign.ru>2006-03-28 16:11:27 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-28 18:36:44 -0800
commita7e5328a06a2beee3a2bbfaf87ce2a7bbe937de1 (patch)
tree168102a80e9b98d19e8bf39156d35dacdb253c3d /kernel
parent4a2c7a7837da1b91468e50426066d988050e4d56 (diff)
downloadop-kernel-dev-a7e5328a06a2beee3a2bbfaf87ce2a7bbe937de1.zip
op-kernel-dev-a7e5328a06a2beee3a2bbfaf87ce2a7bbe937de1.tar.gz
[PATCH] cleanup __exit_signal->cleanup_sighand path
Move 'tsk->sighand = NULL' from cleanup_sighand() to __exit_signal(). This makes the exit path more understandable and allows us to do cleanup_sighand() outside of ->siglock protected section. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/exit.c3
-rw-r--r--kernel/fork.c8
2 files changed, 4 insertions, 7 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index 22399ca..bc0ec67 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -114,10 +114,11 @@ static void __exit_signal(struct task_struct *tsk)
__unhash_process(tsk);
tsk->signal = NULL;
- cleanup_sighand(tsk);
+ tsk->sighand = NULL;
spin_unlock(&sighand->siglock);
rcu_read_unlock();
+ __cleanup_sighand(sighand);
clear_tsk_thread_flag(tsk,TIF_SIGPENDING);
flush_sigqueue(&tsk->pending);
if (sig) {
diff --git a/kernel/fork.c b/kernel/fork.c
index aa50c84..b3f7a1b 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -803,12 +803,8 @@ static inline int copy_sighand(unsigned long clone_flags, struct task_struct * t
return 0;
}
-void cleanup_sighand(struct task_struct *tsk)
+void __cleanup_sighand(struct sighand_struct *sighand)
{
- struct sighand_struct * sighand = tsk->sighand;
-
- /* Ok, we're done with the signal handlers */
- tsk->sighand = NULL;
if (atomic_dec_and_test(&sighand->count))
kmem_cache_free(sighand_cachep, sighand);
}
@@ -1233,7 +1229,7 @@ bad_fork_cleanup_mm:
bad_fork_cleanup_signal:
cleanup_signal(p);
bad_fork_cleanup_sighand:
- cleanup_sighand(p);
+ __cleanup_sighand(p->sighand);
bad_fork_cleanup_fs:
exit_fs(p); /* blocking */
bad_fork_cleanup_files:
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