linux-kernel - Re: [PATCH v3 03/15] powerpc/align: Convert emulate_spe() to user_access

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Message-Id: <161806492680.1467223.16788785953274402372.b4-ty@ellerman.id.au>
Date:   Sun, 11 Apr 2021 00:28:46 +1000
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Daniel Axtens <dja@...ens.net>,
        Paul Mackerras <paulus@...ba.org>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v3 03/15] powerpc/align: Convert emulate_spe() to user_access_begin

On Fri, 12 Mar 2021 13:25:11 +0000 (UTC), Christophe Leroy wrote:
> This patch converts emulate_spe() to using user_access_begin
> logic.
> 
> Since commit 662bbcb2747c ("mm, sched: Allow uaccess in atomic with
> pagefault_disable()"), might_fault() doesn't fire when called from
> sections where pagefaults are disabled, which must be the case
> when using _inatomic variants of __get_user and __put_user. So
> the might_fault() in user_access_begin() is not a problem.
> 
> [...]

Applied to powerpc/next.

[03/15] powerpc/align: Convert emulate_spe() to user_access_begin
        https://git.kernel.org/powerpc/c/3fa3db32956d74c0784171ae0334685502bb169a

cheers