Subject: + task_work-minor-cleanups.patch added to -mm tree
To: oleg@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 19 Aug 2013 14:34:55 -0700
The patch titled
Subject: task_work: minor cleanups
has been added to the -mm tree. Its filename is
task_work-minor-cleanups.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/task_work-minor-cleanups.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/task_work-minor-cleanups.patch
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------------------------------------------------------
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Subject: task_work: minor cleanups
Trivial. Remove the unnecessary "work = NULL" initialization and turn
read_barrier_depends() into smp_read_barrier_depends() in
task_work_cancel().
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/task_work.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN kernel/task_work.c~task_work-minor-cleanups kernel/task_work.c
--- a/kernel/task_work.c~task_work-minor-cleanups
+++ a/kernel/task_work.c
@@ -25,7 +25,7 @@ struct callback_head *
task_work_cancel(struct task_struct *task, task_work_func_t func)
{
struct callback_head **pprev = &task->task_works;
- struct callback_head *work = NULL;
+ struct callback_head *work;
unsigned long flags;
/*
* If cmpxchg() fails we continue without updating pprev.
@@ -35,7 +35,7 @@ task_work_cancel(struct task_struct *tas
*/
raw_spin_lock_irqsave(&task->pi_lock, flags);
while ((work = ACCESS_ONCE(*pprev))) {
- read_barrier_depends();
+ smp_read_barrier_depends();
if (work->func != func)
pprev = &work->next;
else if (cmpxchg(pprev, work, work->next) == work)
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
include-linux-schedh-dont-use-task-pid-tgid-in-same_thread_group-has_group_leader_pid.patch
mm-mempolicy-turn-vma_set_policy-into-vma_dup_policy.patch
mm-shift-vm_grows-check-from-mmap_region-to-do_mmap_pgoff-v2.patch
mm-do_mmap_pgoff-cleanup-the-usage-of-file_inode.patch
mm-mmap_region-kill-correct_wcount-inode-use-allow_write_access.patch
kernel-wide-fix-missing-validations-on-__get-__put-__copy_to-__copy_from_user.patch
task_work-minor-cleanups.patch
task_work-documentation.patch
autofs4-allow-autofs-to-work-outside-the-initial-pid-namespace.patch
autofs4-translate-pids-to-the-right-namespace-for-the-daemon.patch
__ptrace_may_access-should-not-deny-sub-threads.patch
signals-eventpoll-set-saved_sigmask-at-the-start.patch
move-exit_task_namespaces-outside-of-exit_notify-fix.patch
exec-introduce-exec_binprm-for-depth-==-0-code.patch
exec-kill-int-depth-in-search_binary_handler.patch
exec-proc_exec_connector-should-be-called-only-once.patch
exec-move-allow_write_access-fput-to-exec_binprm.patch
exec-kill-load_binary-=-null-check-in-search_binary_handler.patch
exec-cleanup-the-config_modules-logic.patch
exec-dont-retry-if-request_module-fails.patch
exec-cleanup-the-error-handling-in-search_binary_handler.patch
linux-next.patch
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