linux-kernel - Re: [PATCH] powerpc/32s: Fix napping restore in data storage interrupt (DSI)

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Date:   Fri, 13 Aug 2021 21:57:46 +1000
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Finn Thain <fthain@...ux-m68k.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Michael Ellerman <mpe@...erman.id.au>, userm57@...oo.com,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Paul Mackerras <paulus@...ba.org>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/32s: Fix napping restore in data storage interrupt (DSI)

On Tue, 3 Aug 2021 15:14:27 +0000 (UTC), Christophe Leroy wrote:
> When a DSI (Data Storage Interrupt) is taken while in NAP mode,
> r11 doesn't survive the call to power_save_ppc32_restore().
> 
> So use r1 instead of r11 as they both contain the virtual stack
> pointer at that point.

Applied to powerpc/fixes.

[1/1] powerpc/32s: Fix napping restore in data storage interrupt (DSI)
      https://git.kernel.org/powerpc/c/62376365048878f770d8b7d11b89b8b3e18018f1

cheers