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authorOleg Nesterov <oleg@redhat.com>2012-03-05 14:59:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-05 15:49:42 -0800
commitc415c3b47ea2754659d915cca387a20999044163 (patch)
treec2cb1134f139702e06ade8aecbeff70be7ea727c /kernel/fork.c
parent880641bb9da2473e9ecf6c708d993b29928c1b3c (diff)
downloadop-kernel-dev-c415c3b47ea2754659d915cca387a20999044163.zip
op-kernel-dev-c415c3b47ea2754659d915cca387a20999044163.tar.gz
vfork: introduce complete_vfork_done()
No functional changes. Move the clear-and-complete-vfork_done code into the new trivial helper, complete_vfork_done(). Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index e2cd3e2..cf3d963 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -668,6 +668,14 @@ struct mm_struct *mm_access(struct task_struct *task, unsigned int mode)
return mm;
}
+void complete_vfork_done(struct task_struct *tsk)
+{
+ struct completion *vfork_done = tsk->vfork_done;
+
+ tsk->vfork_done = NULL;
+ complete(vfork_done);
+}
+
/* Please note the differences between mmput and mm_release.
* mmput is called whenever we stop holding onto a mm_struct,
* error success whatever.
@@ -683,8 +691,6 @@ struct mm_struct *mm_access(struct task_struct *task, unsigned int mode)
*/
void mm_release(struct task_struct *tsk, struct mm_struct *mm)
{
- struct completion *vfork_done = tsk->vfork_done;
-
/* Get rid of any futexes when releasing the mm */
#ifdef CONFIG_FUTEX
if (unlikely(tsk->robust_list)) {
@@ -704,11 +710,8 @@ void mm_release(struct task_struct *tsk, struct mm_struct *mm)
/* Get rid of any cached register state */
deactivate_mm(tsk, mm);
- /* notify parent sleeping on vfork() */
- if (vfork_done) {
- tsk->vfork_done = NULL;
- complete(vfork_done);
- }
+ if (tsk->vfork_done)
+ complete_vfork_done(tsk);
/*
* If we're exiting normally, clear a user-space tid field if
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