From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 1/8] ARM: add missing volatile in get_cr()
Date: Mon, 8 Aug 2011 08:46:36 +0200 [thread overview]
Message-ID: <1312786003-14734-2-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1312786003-14734-1-git-send-email-s.hauer@pengutronix.de>
Without it, the compiler optimizes away subsequent reads of the
control register.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
arch/arm/include/asm/system.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index 77d6305..1d67492 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -59,7 +59,7 @@
static inline unsigned int get_cr(void)
{
unsigned int val;
- asm("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc");
+ asm volatile ("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc");
return val;
}
--
1.7.5.4
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next prev parent reply other threads:[~2011-08-08 6:46 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-08 6:46 ARM: use high vectors if possible Sascha Hauer
2011-08-08 6:46 ` Sascha Hauer [this message]
2011-08-08 6:46 ` [PATCH 2/8] ARM mmu: fix arm_create_pte Sascha Hauer
2011-08-08 6:46 ` [PATCH 3/8] ARM mmu: use high vectors if possible Sascha Hauer
2011-08-08 6:46 ` [PATCH 4/8] ARM: remove unused exception Sascha Hauer
2011-08-08 6:46 ` [PATCH 5/8] ARM: exceptions: remove unnecessary function declarations Sascha Hauer
2011-08-08 6:46 ` [PATCH 6/8] ARM: remove unused irq enable/disable functions Sascha Hauer
2011-08-08 6:46 ` [PATCH 7/8] ARM: fix comments in interrupts.c Sascha Hauer
2011-08-08 6:46 ` [PATCH 8/8] ARM: some cleanup " Sascha Hauer
2011-08-08 7:06 ` ARM: use high vectors if possible Jean-Christophe PLAGNIOL-VILLARD
2011-08-08 7:32 ` Sascha Hauer
2011-08-09 7:36 ` Jean-Christophe PLAGNIOL-VILLARD
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