linux-kernel - Re: [PATCH] microblaze: add support for TIF_NOTIFY

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Message-ID: <894b3a46-4baa-f186-f6a1-4f818a5284e4@monstr.eu>
Date:   Mon, 9 Nov 2020 12:19:58 +0100
From:   Michal Simek <monstr@...str.eu>
To:     Jens Axboe <axboe@...nel.dk>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] microblaze: add support for TIF_NOTIFY_SIGNAL



On 29. 10. 20 17:16, Jens Axboe wrote:
> Wire up TIF_NOTIFY_SIGNAL handling for microblaze.
> 
> Cc: Michal Simek <monstr@...str.eu>
> 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@kernel.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/microblaze/include/asm/thread_info.h | 2 ++
>  arch/microblaze/kernel/signal.c           | 3 ++-
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/microblaze/include/asm/thread_info.h b/arch/microblaze/include/asm/thread_info.h
> index ad8e8fcb90d3..44f5ca331862 100644
> --- a/arch/microblaze/include/asm/thread_info.h
> +++ b/arch/microblaze/include/asm/thread_info.h
> @@ -107,6 +107,7 @@ static inline struct thread_info *current_thread_info(void)
>  #define TIF_NEED_RESCHED	3 /* rescheduling necessary */
>  /* restore singlestep on return to user mode */
>  #define TIF_SINGLESTEP		4
> +#define TIF_NOTIFY_SIGNAL	5	/* signal notifications exist */
>  #define TIF_MEMDIE		6	/* is terminating due to OOM killer */
>  #define TIF_SYSCALL_AUDIT	9       /* syscall auditing active */
>  #define TIF_SECCOMP		10      /* secure computing */
> @@ -119,6 +120,7 @@ static inline struct thread_info *current_thread_info(void)
>  #define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
>  #define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
>  #define _TIF_SINGLESTEP		(1 << TIF_SINGLESTEP)
> +#define _TIF_NOTIFY_SIGNAL	(1 << TIF_NOTIFY_SIGNAL)
>  #define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
>  #define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
>  #define _TIF_SECCOMP		(1 << TIF_SECCOMP)
> diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
> index f11a0ccccabc..5a8d173d7b75 100644
> --- a/arch/microblaze/kernel/signal.c
> +++ b/arch/microblaze/kernel/signal.c
> @@ -313,7 +313,8 @@ static void do_signal(struct pt_regs *regs, int in_syscall)
>  
>  asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall)
>  {
> -	if (test_thread_flag(TIF_SIGPENDING))
> +	if (test_thread_flag(TIF_SIGPENDING) ||
> +	    test_thread_flag(TIF_NOTIFY_SIGNAL))
>  		do_signal(regs, in_syscall);
>  
>  	if (test_thread_flag(TIF_NOTIFY_RESUME))
> 

Applied for 5.11.

Thanks,
Michal

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs