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Date: Wed, 5 Sep 2012 20:13:12 +0100
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>, linux-arch@vger.kernel.org,
        Marc Zyngier <marc.zyngier@arm.com>, Will Deacon <will.deacon@arm.com>,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 20/31] arm64: User access library function
Message-ID: <20120905191312.GH24085@n2100.arm.linux.org.uk>
References: <1344966752-16102-1-git-send-email-catalin.marinas@arm.com> <1344966752-16102-21-git-send-email-catalin.marinas@arm.com> <201208151449.54834.arnd@arndb.de>
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On Wed, Aug 15, 2012 at 02:49:54PM +0000, Arnd Bergmann wrote:
> It's fairly unusual to have out of line get_user/put_user functions.
> What is the reason for this, other than copying from ARM?

Actually, we never used to out of line on ARM, and then I experimented,
and found there was a net benefit - not only in code size but also
there appeared to be a performance benefit by out of lining them.