The current task doesn't need the scheduler's protection to unwind its
own stack.
Tested-by: Seth Forshee (DigitalOcean) <sforshee@kernel.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
---
kernel/livepatch/transition.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/kernel/livepatch/transition.c b/kernel/livepatch/transition.c
index f1b25ec581e0..4d1f443778f7 100644
--- a/kernel/livepatch/transition.c
+++ b/kernel/livepatch/transition.c
@@ -307,7 +307,11 @@ static bool klp_try_switch_task(struct task_struct *task)
* functions. If all goes well, switch the task to the target patch
* state.
*/
- ret = task_call_func(task, klp_check_and_switch_task, &old_name);
+ if (task == current)
+ ret = klp_check_and_switch_task(current, &old_name);
+ else
+ ret = task_call_func(task, klp_check_and_switch_task, &old_name);
+
switch (ret) {
case 0: /* success */
break;
--
2.39.1