From: Jonathan Corbet <corbet@lwn.net>
To: Breno Rodrigues Alves <breno3011alves@gmail.com>, linux@armlinux.org.uk
Cc: Bart Van Assche <bvanassche@acm.org>,
James.Bottomley@HansenPartnership.com, mkp@kernel.org,
linux-arm-kernel@lists.infradead.org, linux-scsi@vger.kernel.org,
linux-kernel@vger.kernel.org,
Breno Rodrigues Alves <breno3011alves@gmail.com>
Subject: Re: [PATCH v4] scsi: arm: Convert acornscsi-io.S to C
Date: Thu, 22 Oct 2026 15:44:40 -0600 [thread overview]
Message-ID: <871p9h1kc7.fsf@trenco.lwn.net> (raw)
In-Reply-To: <20261022210252.80844-1-breno3011alves@gmail.com>
Breno Rodrigues Alves <breno3011alves@gmail.com> writes:
> The Acorn SCSI expansion card presents each 16-bit SCSI data halfword
> on the low half of a 32-bit card access. The hand-written assembly
> in acornscsi-io.S implements the two directions of the data path:
>
> - __acornscsi_in() : packs pairs of 16-bit card reads into 32-bit
> memory words
> - __acornscsi_out() : expands 16-bit memory halfwords into 32-bit
> card writes (duplicating the halfword in both
> halves for the bulk of the transfer)
>
> Both routines are simple pointer walks that a modern compiler handles
> just as well as hand-written assembly, so replace the .S file with an
> equivalent C implementation.
How have you tested this change?
jon
next prev parent reply other threads:[~2026-10-22 21:44 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-22 18:36 [PATCH 0/1] scsi: arm: Convert acornscsi-io.S to C Breno Rodrigues Alves
2026-10-22 18:36 ` [PATCH] " Breno Rodrigues Alves
2026-10-22 18:45 ` sashiko-bot
2026-10-22 18:52 ` [PATCH v2 0/1] " Breno Rodrigues Alves
2026-10-22 18:52 ` [PATCH v2] " Breno Rodrigues Alves
2026-10-22 19:22 ` Bart Van Assche
2026-10-22 20:30 ` Breno Rodrigues Alves
2026-10-22 21:02 ` Breno Rodrigues Alves
2026-10-22 20:30 ` [PATCH v3] " Breno Rodrigues Alves
2026-10-22 20:49 ` Bart Van Assche
2026-10-22 21:02 ` [PATCH v4] " Breno Rodrigues Alves
2026-10-22 21:36 ` Bart Van Assche
2026-10-22 21:44 ` Jonathan Corbet [this message]
2026-10-22 21:48 ` Breno Rodrigues Alves
2026-10-22 22:15 ` Jonathan Corbet
2026-10-22 22:28 ` Breno Rodrigues Alves
2026-10-22 22:46 ` Jonathan Corbet
2026-10-22 23:00 ` Breno Rodrigues Alves
2026-10-22 23:40 ` Bart Van Assche
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