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sched/headers, cgroups: Remove the threadgroup_change_*() wrappery

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threadgroup_change_begin()/end() is a pointless wrapper around
cgroup_threadgroup_change_begin()/end(), minus a might_sleep()
in the !CONFIG_CGROUPS=y case.

Remove the wrappery, move the might_sleep() (the down_read()
already has a might_sleep() check).

This debloats <linux/sched.h> a bit and simplifies this API.

Update all call sites.

No change in functionality.

Acked-by: Linus Torvalds <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Ingo Molnar 2017-02-02 11:50:56 +01:00
commit 780de9dd27
6 changed files with 18 additions and 43 deletions
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6
kernel/signal.c
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@ -2395,11 +2395,11 @@ void exit_signals(struct task_struct *tsk)
* @tsk is about to have PF_EXITING set - lock out users which
* expect stable threadgroup.
*/
threadgroup_change_begin(tsk);
cgroup_threadgroup_change_begin(tsk);
if (thread_group_empty(tsk) || signal_group_exit(tsk->signal)) {
tsk->flags |= PF_EXITING;
threadgroup_change_end(tsk);
cgroup_threadgroup_change_end(tsk);
return;
}
@ -2410,7 +2410,7 @@ void exit_signals(struct task_struct *tsk)
*/
tsk->flags |= PF_EXITING;
threadgroup_change_end(tsk);
cgroup_threadgroup_change_end(tsk);
if (!signal_pending(tsk))
goto out;