From: Jack Steiner <steiner@sgi.com>
To: mingo@elte.hu, tglx@linutronix.de
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, hpa@zytor.com,
dwalker@fifo99.com, cfriesen@nortel.com
Subject: [PATCH V3] x86: SGU UV Add volatile semantics to macros that access chipset registers
Date: Thu, 10 Sep 2009 09:31:49 -0500 [thread overview]
Message-ID: <20090910143149.GA14273@sgi.com> (raw)
In-Reply-To: <4AA86CFA.8090000@zytor.com>
Add volatile-semantics to the SGI UV read/write macros that are
used to access chipset memory mapped registers. No direct
references to volatile are made. Instead the readq/writeq
macros are used.
Signed-off-by: Jack Steiner <steiner@sgi.com>
---
arch/x86/include/asm/uv/uv_hub.h | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
Index: linux/arch/x86/include/asm/uv/uv_hub.h
===================================================================
--- linux.orig/arch/x86/include/asm/uv/uv_hub.h 2009-09-09 01:34:02.000000000 -0500
+++ linux/arch/x86/include/asm/uv/uv_hub.h 2009-09-09 20:51:53.000000000 -0500
@@ -15,6 +15,7 @@
#include <linux/numa.h>
#include <linux/percpu.h>
#include <linux/timer.h>
+#include <linux/io.h>
#include <asm/types.h>
#include <asm/percpu.h>
#include <asm/uv/uv_mmrs.h>
@@ -258,13 +259,13 @@ static inline unsigned long *uv_global_m
static inline void uv_write_global_mmr32(int pnode, unsigned long offset,
unsigned long val)
{
- *uv_global_mmr32_address(pnode, offset) = val;
+ writeq(val, uv_global_mmr32_address(pnode, offset));
}
static inline unsigned long uv_read_global_mmr32(int pnode,
unsigned long offset)
{
- return *uv_global_mmr32_address(pnode, offset);
+ return readq(uv_global_mmr32_address(pnode, offset));
}
/*
@@ -281,13 +282,13 @@ static inline unsigned long *uv_global_m
static inline void uv_write_global_mmr64(int pnode, unsigned long offset,
unsigned long val)
{
- *uv_global_mmr64_address(pnode, offset) = val;
+ writeq(val, uv_global_mmr64_address(pnode, offset));
}
static inline unsigned long uv_read_global_mmr64(int pnode,
unsigned long offset)
{
- return *uv_global_mmr64_address(pnode, offset);
+ return readq(uv_global_mmr64_address(pnode, offset));
}
/*
@@ -301,22 +302,22 @@ static inline unsigned long *uv_local_mm
static inline unsigned long uv_read_local_mmr(unsigned long offset)
{
- return *uv_local_mmr_address(offset);
+ return readq(uv_local_mmr_address(offset));
}
static inline void uv_write_local_mmr(unsigned long offset, unsigned long val)
{
- *uv_local_mmr_address(offset) = val;
+ writeq(val, uv_local_mmr_address(offset));
}
static inline unsigned char uv_read_local_mmr8(unsigned long offset)
{
- return *((unsigned char *)uv_local_mmr_address(offset));
+ return readb(uv_local_mmr_address(offset));
}
static inline void uv_write_local_mmr8(unsigned long offset, unsigned char val)
{
- *((unsigned char *)uv_local_mmr_address(offset)) = val;
+ writeb(val, uv_local_mmr_address(offset));
}
/*
--
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parent reply other threads:[~2009-09-10 14:31 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <4AA86CFA.8090000@zytor.com>]
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