From: Mike Frysinger <vapier.adi@gmail.com>
Date: Thu, 16 Oct 2008 15:55:41 +0000 (+0800)
Subject: Blackfin arch: make sure cycles is marked as volatile so gcc doesnt reorder on us
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1390da4ee75168b6e4d8354e93e3b5f0a0291f2f;p=openwrt%2Fstaging%2Fblogic.git

Blackfin arch: make sure cycles is marked as volatile so gcc doesnt reorder on us

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
---

diff --git a/arch/blackfin/include/asm/timex.h b/arch/blackfin/include/asm/timex.h
index 22b0806161bb..248aeb066805 100644
--- a/arch/blackfin/include/asm/timex.h
+++ b/arch/blackfin/include/asm/timex.h
@@ -16,7 +16,7 @@ typedef unsigned long long cycles_t;
 static inline cycles_t get_cycles(void)
 {
 	unsigned long tmp, tmp2;
-	__asm__("%0 = cycles; %1 = cycles2;" : "=d"(tmp), "=d"(tmp2));
+	__asm__ __volatile__("%0 = cycles; %1 = cycles2;" : "=d"(tmp), "=d"(tmp2));
 	return tmp | ((cycles_t)tmp2 << 32);
 }