From 1d98a69e5cef3aeb68bcefab0e67e342d6bb4dad Mon Sep 17 00:00:00 2001 From: Kamalesh Babulal Date: Thu, 12 Jul 2018 13:35:06 +0530 Subject: [PATCH] livepatch: Remove reliable stacktrace check in klp_try_switch_task() Support for immediate flag was removed by commit d0807da78e11 ("livepatch: Remove immediate feature"). We bail out during patch registration for architectures, those don't support reliable stack trace. Remove the check in klp_try_switch_task(), as its not required. Signed-off-by: Kamalesh Babulal Reviewed-by: Petr Mladek Acked-by: Miroslav Benes Acked-by: Josh Poimboeuf Signed-off-by: Jiri Kosina --- kernel/livepatch/transition.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/kernel/livepatch/transition.c b/kernel/livepatch/transition.c index 7c6631e693bc..5bc349805e03 100644 --- a/kernel/livepatch/transition.c +++ b/kernel/livepatch/transition.c @@ -309,13 +309,6 @@ static bool klp_try_switch_task(struct task_struct *task) if (task->patch_state == klp_target_state) return true; - /* - * For arches which don't have reliable stack traces, we have to rely - * on other methods (e.g., switching tasks at kernel exit). - */ - if (!klp_have_reliable_stack()) - return false; - /* * Now try to check the stack for any to-be-patched or to-be-unpatched * functions. If all goes well, switch the task to the target patch