From: David S. Miller <davem@davemloft.net>
Date: Wed, 23 May 2012 00:53:19 +0000 (-0700)
Subject: sparc: Add full proper error handling to strncpy_from_user().
X-Git-Tag: v3.5-rc1~90^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ff06dffbc8abfc60d6a0332f058f1d1bb01abb31;p=pandora-kernel.git

sparc: Add full proper error handling to strncpy_from_user().

Linus removed the end-of-address-space hackery from
fs/namei.c:do_getname() so we really have to validate these edge
conditions and cannot cheat any more (as x86 used to as well).

Move to a common C implementation like x86 did.  And if both
src and dst are sufficiently aligned we'll do word at a time
copies and checks as well.

Signed-off-by: David S. Miller <davem@davemloft.net>
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