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From: Karl Mehltretter <kmehltretter@gmail.com>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: linux-arm-kernel@lists.infradead.org,
	 Russell King <linux@armlinux.org.uk>,
	Will Deacon <will@kernel.org>
Subject: Re: [PATCH] arm: asid: Do not replace active_asids if already 0
Date: Sat, 25 Jul 2026 12:12:16 +0200	[thread overview]
Message-ID: <amSFZixpR60Mrg7B@gmail.com> (raw)
In-Reply-To: <20180104180405.37596-1-catalin.marinas@arm.com>

On Thu, Jan 04, 2018 at 06:04:05PM +0100, Catalin Marinas wrote:
> This patch changes the xchg to cmpxchg so that the active_asids is only
> updated if non-zero to avoid a race with an ASID roll-over on a
> different CPU.
> 
> Cc: Russell King <linux@armlinux.org.uk>
> Cc: Will Deacon <will.deacon@arm.com>
> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
> ---
> 
> This is similar to the arm64 patch [1], with the difference that non-relaxed
> (cmp)xchg is used as per the existing code.
> 
> [1] http://lkml.kernel.org/r/20180104111721.33834-1-catalin.marinas at arm.com
> 

Hello Catalin,

While the arm64 patch was reviewed and merged, this patch never got any reply.
It needs a small rebase, but the change itself still applies today.

Would you like to resend it ? 

Thanks,
Karl


      reply	other threads:[~2026-07-25 10:12 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-04 18:04 [PATCH] arm: asid: Do not replace active_asids if already 0 Catalin Marinas
2026-07-25 10:12 ` Karl Mehltretter [this message]

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