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authorIngo Molnar <mingo@kernel.org>2017-02-02 11:50:56 +0100
committerIngo Molnar <mingo@kernel.org>2017-03-02 08:42:25 +0100
commit780de9dd2720debc14c501dab4dc80d1f75ad50e (patch)
tree706aee839aae1d5f82391eeb5c76cc8088c53e27 /kernel
parentf9411ebe3d85cbbea06298241e6053d031d281fc (diff)
downloadop-kernel-dev-780de9dd2720debc14c501dab4dc80d1f75ad50e.zip
op-kernel-dev-780de9dd2720debc14c501dab4dc80d1f75ad50e.tar.gz
sched/headers, cgroups: Remove the threadgroup_change_*() wrappery
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 <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> 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')
-rw-r--r--kernel/cgroup/pids.c2
-rw-r--r--kernel/fork.c6
-rw-r--r--kernel/signal.c6
3 files changed, 7 insertions, 7 deletions
diff --git a/kernel/cgroup/pids.c b/kernel/cgroup/pids.c
index 2bd6737..e756dae 100644
--- a/kernel/cgroup/pids.c
+++ b/kernel/cgroup/pids.c
@@ -214,7 +214,7 @@ static void pids_cancel_attach(struct cgroup_taskset *tset)
/*
* task_css_check(true) in pids_can_fork() and pids_cancel_fork() relies
- * on threadgroup_change_begin() held by the copy_process().
+ * on cgroup_threadgroup_change_begin() held by the copy_process().
*/
static int pids_can_fork(struct task_struct *task)
{
diff --git a/kernel/fork.c b/kernel/fork.c
index 246bf9a..d043fed 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1746,7 +1746,7 @@ static __latent_entropy struct task_struct *copy_process(
INIT_LIST_HEAD(&p->thread_group);
p->task_works = NULL;
- threadgroup_change_begin(current);
+ cgroup_threadgroup_change_begin(current);
/*
* Ensure that the cgroup subsystem policies allow the new process to be
* forked. It should be noted the the new process's css_set can be changed
@@ -1843,7 +1843,7 @@ static __latent_entropy struct task_struct *copy_process(
proc_fork_connector(p);
cgroup_post_fork(p);
- threadgroup_change_end(current);
+ cgroup_threadgroup_change_end(current);
perf_event_fork(p);
trace_task_newtask(p, clone_flags);
@@ -1854,7 +1854,7 @@ static __latent_entropy struct task_struct *copy_process(
bad_fork_cancel_cgroup:
cgroup_cancel_fork(p);
bad_fork_free_pid:
- threadgroup_change_end(current);
+ cgroup_threadgroup_change_end(current);
if (pid != &init_struct_pid)
free_pid(pid);
bad_fork_cleanup_thread:
diff --git a/kernel/signal.c b/kernel/signal.c
index 214a8fe..bae3585 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -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;
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