linux-kernel - Re: [PATCH] cdrom: Avoid barrier_nospec() in cdrom_ioctl_media

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Message-Id: <172921605188.361223.17436309372879358744.b4-ty@kernel.dk>
Date: Thu, 17 Oct 2024 19:47:31 -0600
From: Jens Axboe <axboe@...nel.dk>
To: Phillip Potter <phil@...lpotter.co.uk>, 
 Josh Poimboeuf <jpoimboe@...nel.org>
Cc: linux-kernel@...r.kernel.org, Jordy Zomer <jordyzomer@...gle.com>
Subject: Re: [PATCH] cdrom: Avoid barrier_nospec() in
 cdrom_ioctl_media_changed()


On Thu, 17 Oct 2024 15:09:02 -0700, Josh Poimboeuf wrote:
> The barrier_nospec() after the array bounds check is overkill and
> painfully slow for arches which implement it.
> 
> Furthermore, most arches don't implement it, so they remain exposed to
> Spectre v1 (which can affect pretty much any CPU with branch
> prediction).
> 
> [...]

Applied, thanks!

[1/1] cdrom: Avoid barrier_nospec() in cdrom_ioctl_media_changed()
      commit: b0bf1afde7c34698cf61422fa8ee60e690dc25c3

Best regards,
-- 
Jens Axboe