From: Qian Cai <cai@redhat•com>
To: Jens Axboe <axboe@kernel•dk>
Cc: linux-s390@vger•kernel.org, Heiko Carstens <hca@linux•ibm.com>,
linux-kernel@vger•kernel.org, peterz@infradead•org,
oleg@redhat•com, tglx@linutronix•de,
Stephen Rothwell <sfr@canb•auug.org.au>,
Linux-Next Mailing List <linux-next@vger•kernel.org>
Subject: Re: [PATCH] s390: add support for TIF_NOTIFY_SIGNAL
Date: Mon, 02 Nov 2020 13:58:00 -0500 [thread overview]
Message-ID: <d60d24de6b7c9b948333e4e288452fe0a39d2380.camel@redhat.com> (raw)
In-Reply-To: <54c02fa6-8c8a-667f-af99-e83a1f150586@kernel.dk>
On Mon, 2020-11-02 at 10:07 -0700, Jens Axboe wrote:
> On 11/2/20 9:59 AM, Qian Cai wrote:
> > On Sun, 2020-11-01 at 17:31 +0000, Heiko Carstens wrote:
> > > On Thu, Oct 29, 2020 at 10:21:11AM -0600, Jens Axboe wrote:
> > > > Wire up TIF_NOTIFY_SIGNAL handling for s390.
> > > >
> > > > Cc: linux-s390@vger•kernel.org
> > > > Signed-off-by: Jens Axboe <axboe@kernel•dk>
> >
> > Even though I did confirm that today's linux-next contains this additional
> > patch
> > from Heiko below, a z10 guest is still unable to boot. Reverting the whole
> > series (reverting only "s390: add support for TIF_NOTIFY_SIGNAL" introduced
> > compiling errors) fixed the problem, i.e., git revert --no-edit
> > af0dd809f3d3..7b074c15374c [1]
>
> That's odd, it should build fine without that patch. How did it fail for you?
In file included from ./arch/s390/include/asm/bug.h:5,
from ./include/linux/bug.h:5,
from ./include/linux/mmdebug.h:5,
from ./include/linux/percpu.h:5,
from ./include/linux/context_tracking_state.h:5,
from ./include/linux/hardirq.h:5,
from ./include/linux/kvm_host.h:7,
from arch/s390/kernel/asm-offsets.c:11:
./include/linux/sched/signal.h: In function ‘signal_pending’:
./include/linux/sched/signal.h:368:39: error: ‘TIF_NOTIFY_SIGNAL’ undeclared
(first use in this function); did you mean ‘TIF_NOTIFY_RESUME’?
if (unlikely(test_tsk_thread_flag(p, TIF_NOTIFY_SIGNAL)))
^~~~~~~~~~~~~~~~~
./include/linux/compiler.h:78:42: note: in definition of macro ‘unlikely’
# define unlikely(x) __builtin_expect(!!(x), 0)
^
./include/linux/sched/signal.h:368:39: note: each undeclared identifier is
reported only once for each function it appears in
if (unlikely(test_tsk_thread_flag(p, TIF_NOTIFY_SIGNAL)))
^~~~~~~~~~~~~~~~~
./include/linux/compiler.h:78:42: note: in definition of macro ‘unlikely’
# define unlikely(x) __builtin_expect(!!(x), 0)
^
make[1]: *** [scripts/Makefile.build:117: arch/s390/kernel/asm-offsets.s] Error
1
make: *** [Makefile:1198: prepare0] Error 2
>
> Can you try and add this on top? Looks like I forgot the signal change for
> s390, though that shouldn't really cause any issues.
It does not help with the boot issue at all.
>
>
> diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
> index 9e900a8977bd..a68c3796a1bf 100644
> --- a/arch/s390/kernel/signal.c
> +++ b/arch/s390/kernel/signal.c
> @@ -472,7 +472,7 @@ void do_signal(struct pt_regs *regs)
> current->thread.system_call =
> test_pt_regs_flag(regs, PIF_SYSCALL) ? regs->int_code : 0;
>
> - if (get_signal(&ksig)) {
> + if (test_thread_flag(TIF_NOTIFY_SIGNAL) && get_signal(&ksig)) {
> /* Whee! Actually deliver the signal. */
> if (current->thread.system_call) {
> regs->int_code = current->thread.system_call;
>
next prev parent reply other threads:[~2020-11-02 18:58 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20201101173153.GC9375 () osiris>
2020-11-02 16:59 ` [PATCH] s390: add support for TIF_NOTIFY_SIGNAL Qian Cai
2020-11-02 17:04 ` Heiko Carstens
2020-11-02 17:07 ` Jens Axboe
2020-11-02 18:58 ` Qian Cai [this message]
2020-11-02 19:50 ` Jens Axboe
2020-11-02 21:15 ` Qian Cai
[not found] <54c02fa6-8c8a-667f-af99-e83a1f150586 () kernel ! dk>
2020-11-03 10:54 ` Sven Schnelle
[not found] <20201101173153.GC9375@osiris>
2020-11-03 11:00 ` Sven Schnelle
2020-11-03 14:09 ` Jens Axboe
2020-11-03 15:03 ` Sven Schnelle
2020-11-03 15:12 ` Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=d60d24de6b7c9b948333e4e288452fe0a39d2380.camel@redhat.com \
--to=cai@redhat$(echo .)com \
--cc=axboe@kernel$(echo .)dk \
--cc=hca@linux$(echo .)ibm.com \
--cc=linux-kernel@vger$(echo .)kernel.org \
--cc=linux-next@vger$(echo .)kernel.org \
--cc=linux-s390@vger$(echo .)kernel.org \
--cc=oleg@redhat$(echo .)com \
--cc=peterz@infradead$(echo .)org \
--cc=sfr@canb$(echo .)auug.org.au \
--cc=tglx@linutronix$(echo .)de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox