From 9d9a6ebfea329cadeda87544dceae01e9c27aaef Mon Sep 17 00:00:00 2001 From: Davidlohr Bueso Date: Thu, 23 Apr 2020 22:48:34 -0700 Subject: rcuwait: Let rcuwait_wake_up() return whether or not a task was awoken Propagating the return value of wake_up_process() back to the caller can come in handy for future users, such as for statistics or accounting purposes. Acked-by: Peter Zijlstra (Intel) Signed-off-by: Davidlohr Bueso Message-Id: <20200424054837.5138-3-dave@stgolabs.net> Signed-off-by: Paolo Bonzini --- kernel/exit.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'kernel') diff --git a/kernel/exit.c b/kernel/exit.c index 9f9015f3f6b0..f3beb637acf7 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -227,8 +227,9 @@ repeat: goto repeat; } -void rcuwait_wake_up(struct rcuwait *w) +int rcuwait_wake_up(struct rcuwait *w) { + int ret = 0; struct task_struct *task; rcu_read_lock(); @@ -248,8 +249,10 @@ void rcuwait_wake_up(struct rcuwait *w) task = rcu_dereference(w->task); if (task) - wake_up_process(task); + ret = wake_up_process(task); rcu_read_unlock(); + + return ret; } EXPORT_SYMBOL_GPL(rcuwait_wake_up); -- cgit v1.2.3