linux-kernel - Re: [PATCH v2] signal: Adjust error codes according to restore_user

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Message-ID: <20190524154608.GF2655@redhat.com>
Date:   Fri, 24 May 2019 17:46:09 +0200
From:   Oleg Nesterov <oleg@...hat.com>
To:     David Laight <David.Laight@...LAB.COM>
Cc:     'Deepa Dinamani' <deepa.kernel@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>,
        "dbueso@...e.de" <dbueso@...e.de>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        Davidlohr Bueso <dave@...olabs.net>, Eric Wong <e@...24.org>,
        Jason Baron <jbaron@...mai.com>,
        Linux FS-devel Mailing List <linux-fsdevel@...r.kernel.org>,
        linux-aio <linux-aio@...ck.org>,
        Omar Kilani <omar.kilani@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: Re: [PATCH v2] signal: Adjust error codes according to
 restore_user_sigmask()

On 05/24, David Laight wrote:
>
> From: David Laight
> > Sent: 24 May 2019 16:00
> ...
> > I've had horrid thoughts about SIG_SUSPEND :-)
>
> Not to mention exiting signal handlers with longjmp().

that is why we have siglongjmp().

Oleg.