From: Christoph Hellwig <hch@infradead.org>
To: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Jens Axboe <axboe@kernel.dk>, Chris Mason <clm@fb.com>,
David Sterba <dsterba@suse.com>,
linux-block@vger.kernel.org, linux-btrfs@vger.kernel.org,
linux-raid@vger.kernel.org, dm-devel@lists.linux.dev,
linux-kernel@vger.kernel.org
Subject: Re: [RFC 03/12] bio: add bio_set_errno
Date: Mon, 15 Dec 2025 23:58:11 -0800 [thread overview]
Message-ID: <aUERE4HJN_ek4Eba@infradead.org> (raw)
In-Reply-To: <20251208121020.1780402-4-agruenba@redhat.com>
On Mon, Dec 08, 2025 at 12:10:10PM +0000, Andreas Gruenbacher wrote:
> Add a bio_set_errno(bio, errno) helper that sets bio->bi_status to
> errno_to_blk_status(errno) if errno != 0. Replace instances of this
> pattern in the code with a call to the new helper.
>
> The WRITE_ONCE() in bio_set_errno() ensures that the compiler won't
> reorder things in a weird way, but it isn't needed to prevent tearing
> because a single-byte field like bi_status cannot tear.
Not a fan of this. We should not be doing that very often (and as
seen by the diff don't), so don't add a helper for it that makes
people do it more often.
next prev parent reply other threads:[~2025-12-16 7:58 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-08 12:10 [RFC 00/12] bio cleanups Andreas Gruenbacher
2025-12-08 12:10 ` [RFC 01/12] bio: rename bio_chain arguments Andreas Gruenbacher
2025-12-16 7:57 ` Christoph Hellwig
2025-12-08 12:10 ` [RFC 02/12] bio: use bio_io_error more often Andreas Gruenbacher
2025-12-16 7:57 ` Christoph Hellwig
2025-12-08 12:10 ` [RFC 03/12] bio: add bio_set_errno Andreas Gruenbacher
2025-12-16 7:58 ` Christoph Hellwig [this message]
2025-12-08 12:10 ` [RFC 04/12] bio: use bio_set_errno in more places Andreas Gruenbacher
2025-12-08 12:10 ` [RFC 05/12] bio: add bio_set_status Andreas Gruenbacher
2025-12-16 7:59 ` Christoph Hellwig
2025-12-08 12:10 ` [RFC 06/12] bio: don't check target->bi_status on error Andreas Gruenbacher
2025-12-16 7:59 ` Christoph Hellwig
2025-12-16 8:41 ` Andreas Gruenbacher
2025-12-16 10:44 ` Christoph Hellwig
2025-12-16 11:20 ` Andreas Gruenbacher
2025-12-18 8:47 ` Christoph Hellwig
2025-12-19 20:14 ` Andreas Gruenbacher
2025-12-08 12:10 ` [RFC 07/12] bio: use bio_set_status for BLK_STS_* status codes Andreas Gruenbacher
2025-12-08 12:10 ` [RFC 08/12] bio: use bio_set_status in some more places Andreas Gruenbacher
2025-12-08 12:10 ` [RFC 09/12] bio: switch to bio_set_status in submit_bio_noacct Andreas Gruenbacher
2025-12-08 12:10 ` [RFC 10/12] bio: never set bi_status to BLK_STS_OK during completion Andreas Gruenbacher
2025-12-08 12:10 ` [RFC 11/12] bio: add bio_endio_errno Andreas Gruenbacher
2025-12-16 8:00 ` Christoph Hellwig
2025-12-08 12:10 ` [RFC 12/12] bio: add bio_endio_status Andreas Gruenbacher
2025-12-16 8:01 ` Christoph Hellwig
2025-12-08 19:37 ` [RFC 00/12] bio cleanups David Sterba
2025-12-08 21:16 ` Andreas Gruenbacher
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