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

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Date:   Thu, 5 Nov 2020 10:15:42 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Michal Simek <monstr@...str.eu>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] microblaze: add support for TIF_NOTIFY_SIGNAL

On 11/5/20 9:42 AM, Michal Simek wrote:
> Hi,
> 
> čt 5. 11. 2020 v 17:18 odesílatel Jens Axboe <axboe@...nel.dk> napsal:
>>
>> Gentle nudge on this one.
>>
>> On 10/29/20 10:16 AM, 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))
>>>
>>
>>
>> --
>> Jens Axboe
>>
> 
> Give me some time. I have it on my todo list.

Great, thanks!

-- 
Jens Axboe