Re: [PATCH 7/8] arm64: Define TIF_PATCH_PENDING for livepatch

Miroslav Benes
2025-02-27T12:10:11Z

Hi,

> diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c
> index b260ddc4d3e9..b537af333b42 100644
> --- a/arch/arm64/kernel/entry-common.c
> +++ b/arch/arm64/kernel/entry-common.c
> @@ -8,6 +8,7 @@
> #include <linux/context_tracking.h>
> #include <linux/kasan.h>
> #include <linux/linkage.h>
> +#include <linux/livepatch.h>
> #include <linux/lockdep.h>
> #include <linux/ptrace.h>
> #include <linux/resume_user_mode.h>
> @@ -144,6 +145,9 @@ static void do_notify_resume(struct pt_regs *regs, unsigned long thread_flags)
> (void __user *)NULL, current);
> }
>
> + if (thread_flags & _TIF_PATCH_PENDING)
> + klp_update_patch_state(current);
> +
> if (thread_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
> do_signal(regs);

Just a remark so that it is recorded. Once arm64 is moved to generic
entry infra, the hunk will not be needed.

Regards,
Miroslav