From: Chris Metcalf <cmetcalf@ezchip.com>
Date: Thu, 30 Apr 2015 19:12:42 +0000 (-0400)
Subject: tile: add <asm/word-at-a-time.h> and enable support functions
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~65^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5bf6c07a1843813d0065feaaecba622d49148d7e;p=pandora-kernel.git

tile: add <asm/word-at-a-time.h> and enable support functions

This change enables the generic strncpy_from_user() and strnlen_user()
using word-at-a-time.h.  The tile implementation is trivial since
both tilepro and tilegx have SIMD operations that do byte-wise
comparisons against immediate zero for each byte, and return an
0x01 byte in each position where there is a 0x00 byte.

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
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