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

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Message-ID: <52bbd23b-3bda-31fc-3f38-16749b90be4c@kernel.dk>
Date:   Mon, 25 Mar 2019 10:15:08 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Arnd Bergmann <arnd@...db.de>
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 3/25/19 10:11 AM, Arnd Bergmann wrote:
> 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.

Ah gotcha, just wanted to make sure I didn't miss a patch.

-- 
Jens Axboe