linux-kernel - RE: [PATCH] nios32: add support for TIF_NOTIFY

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Date:   Fri, 30 Oct 2020 00:27:11 +0000
From:   "Tan, Ley Foon" <ley.foon.tan@...el.com>
To:     Jens Axboe <axboe@...nel.dk>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] nios32: add support for TIF_NOTIFY_SIGNAL



> -----Original Message-----
> From: Jens Axboe <axboe@...nel.dk>
> Sent: Friday, October 30, 2020 12:18 AM
> To: Tan, Ley Foon <ley.foon.tan@...el.com>; linux-kernel@...r.kernel.org
> Subject: [PATCH] nios32: add support for TIF_NOTIFY_SIGNAL
> 
> Wire up TIF_NOTIFY_SIGNAL handling for nios32.
> 
> Cc: Ley Foon Tan <ley.foon.tan@...el.com>
> Signed-off-by: Jens Axboe <axboe@...nel.dk>
> ---
> 
> 5.11 has support queued up for TIF_NOTIFY_SIGNAL, see this posting for
> details:
> 
> https://lore.kernel.org/io-uring/20201026203230.386348-1-
> axboe@...nel.dk/
> 
> As part of that work, I'm adding TIF_NOTIFY_SIGNAL support to all archs, as
> that will enable a set of cleanups once all of them support it. I'm happy
> carrying this patch if need be, or it can be funelled through the arch tree. Let
> me know.
> 
>  arch/nios2/include/asm/thread_info.h | 2 ++
>  arch/nios2/kernel/signal.c           | 3 ++-
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/nios2/include/asm/thread_info.h
> b/arch/nios2/include/asm/thread_info.h
> index 7349a4fa635b..272d2c72a727 100644
> --- a/arch/nios2/include/asm/thread_info.h
> +++ b/arch/nios2/include/asm/thread_info.h
> @@ -86,6 +86,7 @@ static inline struct thread_info
> *current_thread_info(void)
>  #define TIF_MEMDIE		4	/* is terminating due to OOM killer */
>  #define TIF_SECCOMP		5	/* secure computing */
>  #define TIF_SYSCALL_AUDIT	6	/* syscall auditing active */
> +#define TIF_NOTIFY_SIGNAL	7	/* signal notifications exist */
>  #define TIF_RESTORE_SIGMASK	9	/* restore signal mask in
> do_signal() */
> 
>  #define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling
> @@ -97,6 +98,7 @@ static inline struct thread_info
> *current_thread_info(void)
>  #define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
>  #define _TIF_SECCOMP		(1 << TIF_SECCOMP)
>  #define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
> +#define _TIF_NOTIFY_SIGNAL	(1 << TIF_NOTIFY_SIGNAL)
>  #define _TIF_RESTORE_SIGMASK	(1 << TIF_RESTORE_SIGMASK)
>  #define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
> 
> diff --git a/arch/nios2/kernel/signal.c b/arch/nios2/kernel/signal.c index
> cf2dca2ac7c3..2009ae2d3c3b 100644
> --- a/arch/nios2/kernel/signal.c
> +++ b/arch/nios2/kernel/signal.c
> @@ -306,7 +306,8 @@ asmlinkage int do_notify_resume(struct pt_regs
> *regs)
>  	if (!user_mode(regs))
>  		return 0;
> 
> -	if (test_thread_flag(TIF_SIGPENDING)) {
> +	if (test_thread_flag(TIF_SIGPENDING) ||
> +	    test_thread_flag(TIF_NOTIFY_SIGNAL)) {
>  		int restart = do_signal(regs);
> 
>  		if (unlikely(restart)) {
> --

Please help integrate this patch thru your git tree.

Acked-by: Ley Foon Tan <ley.foon.tan@...el.com>

Regards
Ley Foon