From: GuanXuetao <gxt@mprc.pku.edu.cn>
Date: Sat, 15 Jan 2011 10:08:09 +0000 (+0800)
Subject: asm-generic headers: add arch-specific __strnlen_user calling in uaccess.h
X-Git-Tag: v2.6.39-rc1~454^2~36
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7f509a9ef7af0d6ac852d49eb87ed2b9857821cc;p=pandora-kernel.git

asm-generic headers: add arch-specific __strnlen_user calling in uaccess.h

This patch changes the implementation of strnlen_user in include/asm-generic/uaccess.h.
Originally, it calls strlen() function directly, which may not correctly handle the access of
user space in most mmu-enabled architectures.
New __strnlen_user is added for using as an architecture specific function.

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
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