From: Vineet Gupta <vgupta@synopsys.com>
Date: Fri, 18 Jan 2013 09:42:16 +0000 (+0530)
Subject: asm-generic: uaccess: Allow arches to over-ride __{get,put}_user_fn()
X-Git-Tag: v3.9-rc1~25^2~75
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=05d88a493746819821733e07bed918a6e09f735b;p=pandora-kernel.git

asm-generic: uaccess: Allow arches to over-ride __{get,put}_user_fn()

As of now these default to calling the arch provided __copy_{to,from}_user()
routines which being general purpose (w.r.t buffer alignment and lengths)
would lead to alignment checks in generated code (for arches which don't
support unaligned load/stores).

Given that in this case we already know that data involved is "unit"
sized and aligned, using the vanilla copy backend is a bit wasteful.

This change thus allows arches to over-ride the aforementioned routines.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
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