From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Thu, 22 Mar 2007 06:23:44 +0000 (+1100)
Subject: [POWERPC] Always use -mno-string
X-Git-Tag: v2.6.22-rc1~1109^2~29
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=57647a4dada06bb4d4056e57b4dcb79c4c8bb191;p=linux-2.6

[POWERPC] Always use -mno-string

The string load/store instructions are unimplemented on some processors
and slow (microcoded) on some others.  It's simplest to just not use
them at all.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index e6c3addef3..26788de1cc 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -102,9 +102,9 @@ CFLAGS += $(call cc-option,-mno-altivec)
 # kernel considerably.
 CFLAGS += $(call cc-option,-funit-at-a-time)
 
-ifndef CONFIG_FSL_BOOKE
-CFLAGS		+= -mstring
-endif
+# Never use string load/store instructions as they are
+# often slow when they are implemented at all
+CFLAGS		+= -mno-string
 
 ifeq ($(CONFIG_6xx),y)
 CFLAGS		+= -mcpu=powerpc