linux-kernel - Re: [PATCH v2] powerpc/32: Fix unpaired stwcx. on interrupt exit

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Message-ID: <176369324782.72695.6792022172636807941.b4-ty@linux.ibm.com>
Date: Fri, 21 Nov 2025 08:23:11 +0530
From: Madhavan Srinivasan <maddy@...ux.ibm.com>
To: Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>
Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v2] powerpc/32: Fix unpaired stwcx. on interrupt exit

On Fri, 12 Sep 2025 10:37:34 +0200, Christophe Leroy wrote:
> Commit b96bae3ae2cb ("powerpc/32: Replace ASM exception exit by C
> exception exit from ppc64") erroneouly copied to powerpc/32 the logic
> from powerpc/64 based on feature CPU_FTR_STCX_CHECKS_ADDRESS which is
> always 0 on powerpc/32.
> 
> Re-instate the logic implemented by commit b64f87c16f3c ("[POWERPC]
> Avoid unpaired stwcx. on some processors") which is based on
> CPU_FTR_NEED_PAIRED_STWCX feature.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/32: Fix unpaired stwcx. on interrupt exit
      https://git.kernel.org/powerpc/c/10e1c77c3636d815db802ceef588522c2d2d947c

Thanks