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Date: Wed, 20 Aug 2008 09:42:57 +0800
From: Huang Ying <ying.huang@...el.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH -mm -v2 1/2] Separate atomic_t declaration from
asm/atomic.h into asm/atomic_def.h
asm/atomic.h contains both declaration and implementation of
atomic_t. So there are some implementation related files included in
asm/atomic.h. And atomic_t is a typedef. Combination of above makes it
impossible to use atomic_t in files included by atomic.h. Such as
atomic_t can not be used in linux/kernel.h on i386, because it is
included by asm/atomic.h.
>>From the perspective of engineering, it is reasonable to separate
declaration from implementation. So a new file atomic_def.h is added
for every architecture to accommodate the declaration of atomic_t.
Signed-off-by: Huang Ying <ying.huang@...el.com>
---
include/asm-alpha/atomic.h | 10 +---------
include/asm-alpha/atomic_def.h | 13 +++++++++++++
include/asm-arm/atomic.h | 3 +--
include/asm-arm/atomic_def.h | 6 ++++++
include/asm-avr32/atomic.h | 2 +-
include/asm-avr32/atomic_def.h | 6 ++++++
include/asm-blackfin/atomic.h | 4 +---
include/asm-blackfin/atomic_def.h | 8 ++++++++
include/asm-cris/atomic.h | 3 +--
include/asm-cris/atomic_def.h | 6 ++++++
include/asm-frv/atomic.h | 5 +----
include/asm-frv/atomic_def.h | 8 ++++++++
include/asm-h8300/atomic.h | 3 ++-
include/asm-h8300/atomic_def.h | 6 ++++++
include/asm-ia64/atomic.h | 8 +-------
include/asm-ia64/atomic_def.h | 11 +++++++++++
include/asm-m32r/atomic.h | 8 +-------
include/asm-m32r/atomic_def.h | 11 +++++++++++
include/asm-m68k/atomic.h | 2 +-
include/asm-m68k/atomic_def.h | 6 ++++++
include/asm-m68knommu/atomic.h | 2 +-
include/asm-m68knommu/atomic_def.h | 6 ++++++
include/asm-mips/atomic.h | 3 +--
include/asm-mips/atomic_def.h | 6 ++++++
include/asm-mn10300/atomic.h | 11 ++---------
include/asm-mn10300/atomic_def.h | 13 +++++++++++++
include/asm-powerpc/atomic.h | 2 +-
include/asm-powerpc/atomic_def.h | 6 ++++++
include/asm-s390/atomic.h | 4 +---
include/asm-s390/atomic_def.h | 8 ++++++++
include/asm-um/atomic_def.h | 6 ++++++
include/asm-x86/atomic_32.h | 10 +---------
include/asm-x86/atomic_64.h | 10 +---------
include/asm-x86/atomic_def.h | 13 +++++++++++++
include/asm-xtensa/atomic.h | 3 +--
include/asm-xtensa/atomic_def.h | 6 ++++++
36 files changed, 165 insertions(+), 73 deletions(-)
--- a/include/asm-x86/atomic_32.h
+++ b/include/asm-x86/atomic_32.h
@@ -4,21 +4,13 @@
#include <linux/compiler.h>
#include <asm/processor.h>
#include <asm/cmpxchg.h>
+#include <asm/atomic_def.h>
/*
* Atomic operations that C can't guarantee us. Useful for
* resource counting etc..
*/
-/*
- * Make sure gcc doesn't try to be clever and move things around
- * on us. We need to use _exactly_ the address the user gave us,
- * not some alias that contains the same information.
- */
-typedef struct {
- int counter;
-} atomic_t;
-
#define ATOMIC_INIT(i) { (i) }
/**
--- a/include/asm-x86/atomic_64.h
+++ b/include/asm-x86/atomic_64.h
@@ -3,6 +3,7 @@
#include <asm/alternative.h>
#include <asm/cmpxchg.h>
+#include <asm/atomic_def.h>
/* atomic_t should be 32 bit signed type */
@@ -11,15 +12,6 @@
* resource counting etc..
*/
-/*
- * Make sure gcc doesn't try to be clever and move things around
- * on us. We need to use _exactly_ the address the user gave us,
- * not some alias that contains the same information.
- */
-typedef struct {
- int counter;
-} atomic_t;
-
#define ATOMIC_INIT(i) { (i) }
/**
--- a/include/asm-alpha/atomic.h
+++ b/include/asm-alpha/atomic.h
@@ -3,6 +3,7 @@
#include <asm/barrier.h>
#include <asm/system.h>
+#include <asm/atomic_def.h>
/*
* Atomic operations that C can't guarantee us. Useful for
@@ -12,15 +13,6 @@
* than regular operations.
*/
-
-/*
- * Counter is volatile to make sure gcc doesn't try to be clever
- * and move things around on us. We need to use _exactly_ the address
- * the user gave us, not some alias that contains the same information.
- */
-typedef struct { volatile int counter; } atomic_t;
-typedef struct { volatile long counter; } atomic64_t;
-
#define ATOMIC_INIT(i) ( (atomic_t) { (i) } )
#define ATOMIC64_INIT(i) ( (atomic64_t) { (i) } )
--- /dev/null
+++ b/include/asm-alpha/atomic_def.h
@@ -0,0 +1,13 @@
+#ifndef _ALPHA_ATOMIC_DEF_H
+#define _ALPHA_ATOMIC_DEF_H
+
+
+/*
+ * Counter is volatile to make sure gcc doesn't try to be clever
+ * and move things around on us. We need to use _exactly_ the address
+ * the user gave us, not some alias that contains the same information.
+ */
+typedef struct { volatile int counter; } atomic_t;
+typedef struct { volatile long counter; } atomic64_t;
+
+#endif
--- /dev/null
+++ b/include/asm-x86/atomic_def.h
@@ -0,0 +1,13 @@
+#ifndef __ARCH_X86_ATOMIC_DEF__
+#define __ARCH_X86_ATOMIC_DEF__
+
+/*
+ * Make sure gcc doesn't try to be clever and move things around
+ * on us. We need to use _exactly_ the address the user gave us,
+ * not some alias that contains the same information.
+ */
+typedef struct {
+ int counter;
+} atomic_t;
+
+#endif
--- a/include/asm-arm/atomic.h
+++ b/include/asm-arm/atomic.h
@@ -13,8 +13,7 @@
#include <linux/compiler.h>
#include <asm/system.h>
-
-typedef struct { volatile int counter; } atomic_t;
+#include <asm/atomic_def.h>
#define ATOMIC_INIT(i) { (i) }
--- /dev/null
+++ b/include/asm-arm/atomic_def.h
@@ -0,0 +1,6 @@
+#ifndef __ASM_ARM_ATOMIC_DEF_H
+#define __ASM_ARM_ATOMIC_DEF_H
+
+typedef struct { volatile int counter; } atomic_t;
+
+#endif
--- /dev/null
+++ b/include/asm-avr32/atomic_def.h
@@ -0,0 +1,6 @@
+#ifndef __ASM_AVR32_ATOMIC_DEF_H
+#define __ASM_AVR32_ATOMIC_DEF_H
+
+typedef struct { volatile int counter; } atomic_t;
+
+#endif
--- a/include/asm-avr32/atomic.h
+++ b/include/asm-avr32/atomic.h
@@ -15,8 +15,8 @@
#define __ASM_AVR32_ATOMIC_H
#include <asm/system.h>
+#include <asm/atomic_def.h>
-typedef struct { volatile int counter; } atomic_t;
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ((v)->counter)
--- /dev/null
+++ b/include/asm-blackfin/atomic_def.h
@@ -0,0 +1,8 @@
+#ifndef __ARCH_BLACKFIN_ATOMIC_DEF__
+#define __ARCH_BLACKFIN_ATOMIC_DEF__
+
+typedef struct {
+ int counter;
+} atomic_t;
+
+#endif
--- a/include/asm-blackfin/atomic.h
+++ b/include/asm-blackfin/atomic.h
@@ -2,6 +2,7 @@
#define __ARCH_BLACKFIN_ATOMIC__
#include <asm/system.h> /* local_irq_XXX() */
+#include <asm/atomic_def.h>
/*
* Atomic operations that C can't guarantee us. Useful for
@@ -13,9 +14,6 @@
* Tony Kou (tonyko@...eo.ca) Lineo Inc. 2001
*/
-typedef struct {
- int counter;
-} atomic_t;
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ((v)->counter)
--- a/include/asm-cris/atomic.h
+++ b/include/asm-cris/atomic.h
@@ -7,14 +7,13 @@
#include <asm/system.h>
#include <asm/arch/atomic.h>
+#include <asm/atomic_def.h>
/*
* Atomic operations that C can't guarantee us. Useful for
* resource counting etc..
*/
-typedef struct { volatile int counter; } atomic_t;
-
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ((v)->counter)
--- /dev/null
+++ b/include/asm-cris/atomic_def.h
@@ -0,0 +1,6 @@
+#ifndef __ASM_CRIS_ATOMIC_DEF__
+#define __ASM_CRIS_ATOMIC_DEF__
+
+typedef struct { volatile int counter; } atomic_t;
+
+#endif
--- /dev/null
+++ b/include/asm-frv/atomic_def.h
@@ -0,0 +1,8 @@
+#ifndef _ASM_ATOMIC_DEF_H
+#define _ASM_ATOMIC_DEF_H
+
+typedef struct {
+ int counter;
+} atomic_t;
+
+#endif
--- a/include/asm-frv/atomic.h
+++ b/include/asm-frv/atomic.h
@@ -17,6 +17,7 @@
#include <linux/types.h>
#include <asm/spr-regs.h>
#include <asm/system.h>
+#include <asm/atomic_def.h>
#ifdef CONFIG_SMP
#error not SMP safe
@@ -35,10 +36,6 @@
#define smp_mb__before_atomic_inc() barrier()
#define smp_mb__after_atomic_inc() barrier()
-typedef struct {
- int counter;
-} atomic_t;
-
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ((v)->counter)
#define atomic_set(v, i) (((v)->counter) = (i))
--- /dev/null
+++ b/include/asm-h8300/atomic_def.h
@@ -0,0 +1,6 @@
+#ifndef __ARCH_H8300_ATOMIC_DEF__
+#define __ARCH_H8300_ATOMIC_DEF__
+
+typedef struct { int counter; } atomic_t;
+
+#endif
--- a/include/asm-h8300/atomic.h
+++ b/include/asm-h8300/atomic.h
@@ -1,12 +1,13 @@
#ifndef __ARCH_H8300_ATOMIC__
#define __ARCH_H8300_ATOMIC__
+#include <asm/atomic_def.h>
+
/*
* Atomic operations that C can't guarantee us. Useful for
* resource counting etc..
*/
-typedef struct { int counter; } atomic_t;
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ((v)->counter)
--- a/include/asm-ia64/atomic.h
+++ b/include/asm-ia64/atomic.h
@@ -16,13 +16,7 @@
#include <asm/intrinsics.h>
#include <asm/system.h>
-
-/*
- * On IA-64, counter must always be volatile to ensure that that the
- * memory accesses are ordered.
- */
-typedef struct { volatile __s32 counter; } atomic_t;
-typedef struct { volatile __s64 counter; } atomic64_t;
+#include <asm/atomic_def.h>
#define ATOMIC_INIT(i) ((atomic_t) { (i) })
#define ATOMIC64_INIT(i) ((atomic64_t) { (i) })
--- /dev/null
+++ b/include/asm-m32r/atomic_def.h
@@ -0,0 +1,11 @@
+#ifndef _ASM_M32R_ATOMIC_DEF_H
+#define _ASM_M32R_ATOMIC_DEF_H
+
+/*
+ * Make sure gcc doesn't try to be clever and move things around
+ * on us. We need to use _exactly_ the address the user gave us,
+ * not some alias that contains the same information.
+ */
+typedef struct { volatile int counter; } atomic_t;
+
+#endif
--- a/include/asm-m32r/atomic.h
+++ b/include/asm-m32r/atomic.h
@@ -11,19 +11,13 @@
#include <asm/assembler.h>
#include <asm/system.h>
+#include <asm/atomic_def.h>
/*
* Atomic operations that C can't guarantee us. Useful for
* resource counting etc..
*/
-/*
- * Make sure gcc doesn't try to be clever and move things around
- * on us. We need to use _exactly_ the address the user gave us,
- * not some alias that contains the same information.
- */
-typedef struct { volatile int counter; } atomic_t;
-
#define ATOMIC_INIT(i) { (i) }
/**
--- /dev/null
+++ b/include/asm-m68k/atomic_def.h
@@ -0,0 +1,6 @@
+#ifndef __ARCH_M68K_ATOMIC_DEF__
+#define __ARCH_M68K_ATOMIC_DEF__
+
+typedef struct { int counter; } atomic_t;
+
+#endif
--- a/include/asm-m68k/atomic.h
+++ b/include/asm-m68k/atomic.h
@@ -3,6 +3,7 @@
#include <asm/system.h>
+#include <asm/atomic_def.h>
/*
* Atomic operations that C can't guarantee us. Useful for
@@ -13,7 +14,6 @@
* We do not have SMP m68k systems, so we don't have to deal with that.
*/
-typedef struct { int counter; } atomic_t;
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ((v)->counter)
--- /dev/null
+++ b/include/asm-m68knommu/atomic_def.h
@@ -0,0 +1,6 @@
+#ifndef __ARCH_M68KNOMMU_ATOMIC_DEF__
+#define __ARCH_M68KNOMMU_ATOMIC_DEF__
+
+typedef struct { int counter; } atomic_t;
+
+#endif
--- a/include/asm-m68knommu/atomic.h
+++ b/include/asm-m68knommu/atomic.h
@@ -2,6 +2,7 @@
#define __ARCH_M68KNOMMU_ATOMIC__
#include <asm/system.h>
+#include <asm/atomic_def.h>
/*
* Atomic operations that C can't guarantee us. Useful for
@@ -12,7 +13,6 @@
* We do not have SMP m68k systems, so we don't have to deal with that.
*/
-typedef struct { int counter; } atomic_t;
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ((v)->counter)
--- /dev/null
+++ b/include/asm-mips/atomic_def.h
@@ -0,0 +1,6 @@
+#ifndef _ASM_ATOMIC_DEF_H
+#define _ASM_ATOMIC_DEF_H
+
+typedef struct { volatile int counter; } atomic_t;
+
+#endif
--- a/include/asm-mips/atomic.h
+++ b/include/asm-mips/atomic.h
@@ -19,8 +19,7 @@
#include <asm/cpu-features.h>
#include <asm/war.h>
#include <asm/system.h>
-
-typedef struct { volatile int counter; } atomic_t;
+#include <asm/atomic_def.h>
#define ATOMIC_INIT(i) { (i) }
--- /dev/null
+++ b/include/asm-mn10300/atomic_def.h
@@ -0,0 +1,13 @@
+#ifndef _ASM_ATOMIC_DEF_H
+#define _ASM_ATOMIC_DEF_H
+
+/*
+ * Make sure gcc doesn't try to be clever and move things around
+ * on us. We need to use _exactly_ the address the user gave us,
+ * not some alias that contains the same information.
+ */
+typedef struct {
+ int counter;
+} atomic_t;
+
+#endif
--- a/include/asm-mn10300/atomic.h
+++ b/include/asm-mn10300/atomic.h
@@ -11,6 +11,8 @@
#ifndef _ASM_ATOMIC_H
#define _ASM_ATOMIC_H
+#include <asm/atomic_def.h>
+
#ifdef CONFIG_SMP
#error not SMP safe
#endif
@@ -20,15 +22,6 @@
* resource counting etc..
*/
-/*
- * Make sure gcc doesn't try to be clever and move things around
- * on us. We need to use _exactly_ the address the user gave us,
- * not some alias that contains the same information.
- */
-typedef struct {
- int counter;
-} atomic_t;
-
#define ATOMIC_INIT(i) { (i) }
#ifdef __KERNEL__
--- /dev/null
+++ b/include/asm-powerpc/atomic_def.h
@@ -0,0 +1,6 @@
+#ifndef _ASM_POWERPC_ATOMIC_DEF_H_
+#define _ASM_POWERPC_ATOMIC_DEF_H_
+
+typedef struct { int counter; } atomic_t;
+
+#endif
--- a/include/asm-powerpc/atomic.h
+++ b/include/asm-powerpc/atomic.h
@@ -5,7 +5,7 @@
* PowerPC atomic operations
*/
-typedef struct { int counter; } atomic_t;
+#include <asm/atomic_def.h>
#ifdef __KERNEL__
#include <linux/compiler.h>
--- a/include/asm-s390/atomic.h
+++ b/include/asm-s390/atomic.h
@@ -2,6 +2,7 @@
#define __ARCH_S390_ATOMIC__
#include <linux/compiler.h>
+#include <asm/atomic_def.h>
/*
* include/asm-s390/atomic.h
@@ -23,9 +24,6 @@
* S390 uses 'Compare And Swap' for atomicity in SMP enviroment
*/
-typedef struct {
- int counter;
-} __attribute__ ((aligned (4))) atomic_t;
#define ATOMIC_INIT(i) { (i) }
#ifdef __KERNEL__
--- /dev/null
+++ b/include/asm-s390/atomic_def.h
@@ -0,0 +1,8 @@
+#ifndef __ARCH_S390_ATOMIC_DEF__
+#define __ARCH_S390_ATOMIC_DEF__
+
+typedef struct {
+ int counter;
+} __attribute__ ((aligned (4))) atomic_t;
+
+#endif
--- /dev/null
+++ b/include/asm-um/atomic_def.h
@@ -0,0 +1,6 @@
+#ifndef __UM_ATOMIC_DEF_H
+#define __UM_ATOMIC_DEF_H
+
+#include "asm/arch/atomic_def.h"
+
+#endif
--- /dev/null
+++ b/include/asm-xtensa/atomic_def.h
@@ -0,0 +1,6 @@
+#ifndef _XTENSA_ATOMIC_DEF_H
+#define _XTENSA_ATOMIC_DEF_H
+
+typedef struct { volatile int counter; } atomic_t;
+
+#endif
--- a/include/asm-xtensa/atomic.h
+++ b/include/asm-xtensa/atomic.h
@@ -14,8 +14,7 @@
#define _XTENSA_ATOMIC_H
#include <linux/stringify.h>
-
-typedef struct { volatile int counter; } atomic_t;
+#include <asm/atomic_def.h>
#ifdef __KERNEL__
#include <asm/processor.h>
--- /dev/null
+++ b/include/asm-ia64/atomic_def.h
@@ -0,0 +1,11 @@
+#ifndef _ASM_IA64_ATOMIC_DEF_H
+#define _ASM_IA64_ATOMIC_DEF_H
+
+/*
+ * On IA-64, counter must always be volatile to ensure that that the
+ * memory accesses are ordered.
+ */
+typedef struct { volatile __s32 counter; } atomic_t;
+typedef struct { volatile __s64 counter; } atomic64_t;
+
+#endif
--
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