On Thu, Jul 12, 2018 at 01:35:06PM +0530, Kamalesh Babulal wrote:
> 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@xxxxxxxxxxxxxxxxxx>
Acked-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
> ---
> 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
> @@ -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.
> --
> 2.7.4
>
--
Josh
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