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Subject: Re: [PATCH] microblaze: add support for TIF_NOTIFY_SIGNAL
To:     Jens Axboe <axboe@kernel.dk>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
References: <a2b78afc-5f60-8590-9df5-17302e356552@kernel.dk>
 <894b3a46-4baa-f186-f6a1-4f818a5284e4@monstr.eu>
 <1877a472-5fbe-5fa7-6ec4-a7bafc0790fd@kernel.dk>
From:   Michal Simek <monstr@monstr.eu>
Message-ID: <e944eb20-4cb6-f138-48da-cad82975d976@monstr.eu>
Date:   Mon, 9 Nov 2020 15:18:40 +0100
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On 09. 11. 20 15:17, Jens Axboe wrote:
> On 11/9/20 4:19 AM, Michal Simek wrote:
>>
>>
>> On 29. 10. 20 17:16, Jens Axboe wrote:
>>> Wire up TIF_NOTIFY_SIGNAL handling for microblaze.
>>>
>>> Cc: Michal Simek <monstr@monstr.eu>
>>> Signed-off-by: Jens Axboe <axboe@kernel.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.
> 
> Would you mind if I carry this patch with an ack? I've got further fixes
> and cleanups that are enabled once all archs have added support.
> 

ok. Not a problem. Will drop it from my queue and feel free to add my

Acked-by: Michal Simek <michal.simek@xilinx.com>

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