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authorKamalesh Babulal <kamalesh@linux.vnet.ibm.com>2018-07-12 13:35:06 +0530
committerJiri Kosina <jkosina@suse.cz>2018-07-16 17:50:33 +0200
commit1d98a69e5cef3aeb68bcefab0e67e342d6bb4dad (patch)
tree42a42efcfc6a838e8c369d2c93f4b6af8de87f0c /kernel/livepatch
parent41e3bef52e42c03cb7234f2d8419352478c92926 (diff)
downloadlinux-1d98a69e5cef3aeb68bcefab0e67e342d6bb4dad.tar.bz2
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 <kamalesh@linux.vnet.ibm.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Acked-by: Miroslav Benes <mbenes@suse.cz> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'kernel/livepatch')
-rw-r--r--kernel/livepatch/transition.c7
1 files changed, 0 insertions, 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
@@ -310,13 +310,6 @@ static bool klp_try_switch_task(struct task_struct *task)
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
* state.