linux-kernel - Re: [PATCH 1/2] io_uring: fix big-endian compat signal mask handling

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Message-ID: <CAK8P3a2SpydaLZijzUXxCzMKSEv3ymfpOCO4xSZOVfz2cwFxAQ@mail.gmail.com>
Date:   Mon, 25 Mar 2019 17:11:53 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Hannes Reinecke <hare@...e.com>,
        Matthew Wilcox <willy@...radead.org>,
        David Hildenbrand <david@...hat.com>,
        Nikolay Borisov <nborisov@...e.com>,
        linux-block <linux-block@...r.kernel.org>,
        Linux FS-devel Mailing List <linux-fsdevel@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] io_uring: fix big-endian compat signal mask handling

On Mon, Mar 25, 2019 at 5:05 PM Jens Axboe <axboe@...nel.dk> wrote:
>
> On 3/25/19 8:34 AM, Arnd Bergmann wrote:
> > On big-endian architectures, the signal masks are differnet
> > between 32-bit and 64-bit tasks, so we have to use a different
> > function for reading them from user space.
> >
> > io_cqring_wait() initially got this wrong, and always interprets
> > this as a native structure. This is ok on x86 and most arm64,
> > but not on s390, ppc64be, mips64be, sparc64 and parisc.
>
> Thanks Arnd, applied.
>
> Was there a 2/2 patch? I only received this one, 1/2.

Sorry I missed you on Cc:
https://lore.kernel.org/lkml/20190325144737.703921-1-arnd@arndb.de/T/#u

This one went out to all the affected arch maintainers.

    Arnd