From 205ccaff92db0e9429b2e831b79c270759615458 Mon Sep 17 00:00:00 2001
From: Oleg Nesterov <oleg@redhat.com>
Date: Tue, 10 Dec 2019 20:19:03 +0100
Subject: [PATCH] sched/wait: fix ___wait_var_event(exclusive)
References: bnc#1155798 (CPU scheduler functional and performance backports)
Patch-mainline: v5.6-rc1
Git-commit: cde65194502778665c1b52afc5722cf7dbfaa399
init_wait_var_entry() forgets to initialize wq_entry->flags.
Currently not a problem, we don't have wait_var_event_exclusive().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Juri Lelli <juri.lelli@redhat.com>
Link: https://lkml.kernel.org/r/20191210191902.GB14449@redhat.com
Signed-off-by: Mel Gorman <mgorman@suse.de>
---
kernel/sched/wait_bit.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/sched/wait_bit.c b/kernel/sched/wait_bit.c
index 45eba18a2898..02ce292b9bc0 100644
--- a/kernel/sched/wait_bit.c
+++ b/kernel/sched/wait_bit.c
@@ -179,6 +179,7 @@ void init_wait_var_entry(struct wait_bit_queue_entry *wbq_entry, void *var, int
.bit_nr = -1,
},
.wq_entry = {
+ .flags = flags,
.private = current,
.func = var_wake_function,
.entry = LIST_HEAD_INIT(wbq_entry->wq_entry.entry),