From: Will Deacon <will.deacon@arm.com>
Date: Wed, 6 Nov 2013 17:20:22 +0000 (+0000)
Subject: arm64: use generic strnlen_user and strncpy_from_user functions
X-Git-Tag: v3.14-rc1~153^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12a0ef7b0ac38677bd2d85f33df5ca0a57868819;p=pandora-kernel.git

arm64: use generic strnlen_user and strncpy_from_user functions

This patch implements the word-at-a-time interface for arm64 using the
same algorithm as ARM. We use the fls64 macro, which expands to a clz
instruction via a compiler builtin. Big-endian configurations make use
of the implementation from asm-generic.

With this implemented, we can replace our byte-at-a-time strnlen_user
and strncpy_from_user functions with the optimised generic versions.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---

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