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>

1 files changed, 3 insertions, 3 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 246bf9aaf9df..d043fedc03c8 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: