preempt/dynamic: Fix setup_preempt_mode() return value

[ Upstream commit 9ed20bafc85806ca6c97c9128cec46c3ef80ae86 ]

__setup() callbacks expect 1 for success and 0 for failure. Correct the
usage here to reflect that.

Fixes: 826bfeb37bb4 ("preempt/dynamic: Support dynamic preempt with preempt= boot option")
Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20211203233203.133581-1-ahalaney@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 6f4625f8276f136edc278ade5a166824302feb6e..4170ec15926eecbb281300cead85ea1dbe9fea43 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6660,11 +6660,11 @@ static int __init setup_preempt_mode(char *str)
        int mode = sched_dynamic_mode(str);
        if (mode < 0) {
                pr_warn("Dynamic Preempt: unsupported mode: %s\n", str);
-               return 1;
+               return 0;
        }
 
        sched_dynamic_update(mode);
-       return 0;
+       return 1;
 }
 __setup("preempt=", setup_preempt_mode);