From: Marek Vasut <marex@denx.de>
Date: Fri, 6 Apr 2012 03:25:06 +0000 (+0000)
Subject: ARM926EJS: Make asm routines volatile in cache ops
X-Git-Tag: v2012.04-rc2~1^2~1
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=c6201553ba73616eed0f416f66d28c39691692bd;p=oweals%2Fu-boot.git

ARM926EJS: Make asm routines volatile in cache ops

We certainly don't want the compiler to reorganise the code for dcache flushing.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Stefano Babic <sbabic@denx.de>
---

diff --git a/arch/arm/cpu/arm926ejs/cache.c b/arch/arm/cpu/arm926ejs/cache.c
index 4430578a81..07f036f18b 100644
--- a/arch/arm/cpu/arm926ejs/cache.c
+++ b/arch/arm/cpu/arm926ejs/cache.c
@@ -82,7 +82,7 @@ void flush_dcache_range(unsigned long start, unsigned long stop)
 		start += CONFIG_SYS_CACHELINE_SIZE;
 	}
 
-	asm("mcr p15, 0, %0, c7, c10, 4\n"::"r"(0));
+	asm volatile("mcr p15, 0, %0, c7, c10, 4\n"::"r"(0));
 }
 
 void flush_cache(unsigned long start, unsigned long size)