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authorPeter Zijlstra <peterz@infradead.org>2016-05-24 15:45:21 +0300
committerIngo Molnar <mingo@kernel.org>2016-06-14 12:55:15 +0300
commitbe3e7844980352756de4261b276ee2ba5be7a26b (patch)
tree977f32f488649a6c77dcec9190d36fddc3df6b69 /kernel/task_work.c
parent726328d92a42b6d4b76078e2659f43067f82c4e8 (diff)
downloadlinux-be3e7844980352756de4261b276ee2ba5be7a26b.tar.xz
locking/spinlock: Update spin_unlock_wait() users
With the modified semantics of spin_unlock_wait() a number of explicit barriers can be removed. Also update the comment for the do_exit() usecase, as that was somewhat stale/obscure. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/task_work.c')
-rw-r--r--kernel/task_work.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/task_work.c b/kernel/task_work.c
index 53fa971d000d..6ab4842b00e8 100644
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
@@ -108,7 +108,6 @@ void task_work_run(void)
* fail, but it can play with *work and other entries.
*/
raw_spin_unlock_wait(&task->pi_lock);
- smp_mb();
do {
next = work->next;