The following commit has been merged into the sched/core branch of tip:
Commit-ID: 6d06c515e9151dc858e391bd6bebce0b684eec4f
Gitweb: https://git.kernel.org/tip/6d06c515e9151dc858e391bd6bebce0b684eec4f
Author: Vincent Donnefort <vincent.donnefort@xxxxxxx>
AuthorDate: Tue, 16 Feb 2021 10:35:04
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Wed, 03 Mar 2021 10:33:00 +01:00
cpu/hotplug: Allowing to reset fail injection
Currently, the only way of resetting the fail injection is to trigger a
hotplug, hotunplug or both. This is rather annoying for testing
and, as the default value for this file is -1, it seems pretty natural to
let a user write it.
Signed-off-by: Vincent Donnefort <vincent.donnefort@xxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20210216103506.416286-2-vincent.donnefort@xxxxxxx
---
kernel/cpu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 1b6302e..9121edf 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -2207,6 +2207,11 @@ static ssize_t write_cpuhp_fail(struct device *dev,
if (ret)
return ret;
+ if (fail == CPUHP_INVALID) {
+ st->fail = fail;
+ return count;
+ }
+
if (fail < CPUHP_OFFLINE || fail > CPUHP_ONLINE)
return -EINVAL;
|