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

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Message-ID: <CAHTX3dK_VbvKEho5vxOkY6BAnUWj8+HJZ6ESsLOmW5TMM3=bCg@mail.gmail.com>
Date:   Thu, 5 Nov 2020 17:42:05 +0100
From:   Michal Simek <monstr@...str.eu>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] microblaze: add support for TIF_NOTIFY_SIGNAL

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.

M


-- 
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