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Date: Fri, 8 Oct 2010 19:03:09 +0900
From: Akinobu Mita <akinobu.mita@...il.com>
To: linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
Arnd Bergmann <arnd@...db.de>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: Akinobu Mita <akinobu.mita@...il.com>
Subject: [PATCH 1/5] bitops: add generic implementation of ext2 atomic bitops by test_and_{set,clear}_bit
This introduces asm-generic header file for generic implementation of
ext2 atomic bit operations by test_and_set_bit() and test_and_clear_bit().
alpha, arm, cris, frv, ia64, m68k, mn10300, parisc, powerpc, s390,
sparc64, x86, xtensa can use this header file in its asm/bitops.h.
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
---
arch/alpha/include/asm/bitops.h | 4 +--
arch/arm/include/asm/bitops.h | 6 +---
arch/cris/include/asm/bitops.h | 4 +--
arch/frv/include/asm/bitops.h | 4 +--
arch/ia64/include/asm/bitops.h | 4 +--
arch/m68k/include/asm/bitops_mm.h | 4 +-
arch/mn10300/include/asm/bitops.h | 6 +----
arch/parisc/include/asm/bitops.h | 9 +-------
arch/powerpc/include/asm/bitops.h | 8 ++----
arch/s390/include/asm/bitops.h | 6 +---
arch/sparc/include/asm/bitops_64.h | 6 +----
arch/x86/include/asm/bitops.h | 6 +----
arch/xtensa/include/asm/bitops.h | 15 +-------------
include/asm-generic/bitops/ext2-atomic-test.h | 26 +++++++++++++++++++++++++
include/asm-generic/bitops/ext2-atomic.h | 4 +++
15 files changed, 48 insertions(+), 64 deletions(-)
create mode 100644 include/asm-generic/bitops/ext2-atomic-test.h
diff --git a/arch/alpha/include/asm/bitops.h b/arch/alpha/include/asm/bitops.h
index adfab8a..778468b 100644
--- a/arch/alpha/include/asm/bitops.h
+++ b/arch/alpha/include/asm/bitops.h
@@ -455,9 +455,7 @@ sched_find_first_bit(const unsigned long b[2])
}
#include <asm-generic/bitops/ext2-non-atomic.h>
-
-#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a)
-#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a)
+#include <asm-generic/bitops/ext2-atomic-test.h>
#include <asm-generic/bitops/minix.h>
diff --git a/arch/arm/include/asm/bitops.h b/arch/arm/include/asm/bitops.h
index 338ff19..f98b8c8 100644
--- a/arch/arm/include/asm/bitops.h
+++ b/arch/arm/include/asm/bitops.h
@@ -309,12 +309,8 @@ static inline int fls(int x)
*/
#define ext2_set_bit(nr,p) \
__test_and_set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define ext2_set_bit_atomic(lock,nr,p) \
- test_and_set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
#define ext2_clear_bit(nr,p) \
__test_and_clear_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define ext2_clear_bit_atomic(lock,nr,p) \
- test_and_clear_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
#define ext2_test_bit(nr,p) \
test_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
#define ext2_find_first_zero_bit(p,sz) \
@@ -324,6 +320,8 @@ static inline int fls(int x)
#define ext2_find_next_bit(p, sz, off) \
_find_next_bit_le(p, sz, off)
+#include <asm-generic/bitops/ext2-atomic-test.h>
+
/*
* Minix is defined to use little-endian byte ordering.
* These do not need to be atomic.
diff --git a/arch/cris/include/asm/bitops.h b/arch/cris/include/asm/bitops.h
index 9e69cfb..e1f77fc 100644
--- a/arch/cris/include/asm/bitops.h
+++ b/arch/cris/include/asm/bitops.h
@@ -155,9 +155,7 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
#include <asm-generic/bitops/lock.h>
#include <asm-generic/bitops/ext2-non-atomic.h>
-
-#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a)
-#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a)
+#include <asm-generic/bitops/ext2-atomic-test.h>
#include <asm-generic/bitops/minix.h>
#include <asm-generic/bitops/sched.h>
diff --git a/arch/frv/include/asm/bitops.h b/arch/frv/include/asm/bitops.h
index 50ae91b..0d718ce 100644
--- a/arch/frv/include/asm/bitops.h
+++ b/arch/frv/include/asm/bitops.h
@@ -402,9 +402,7 @@ int __ilog2_u64(u64 n)
#include <asm-generic/bitops/lock.h>
#include <asm-generic/bitops/ext2-non-atomic.h>
-
-#define ext2_set_bit_atomic(lock,nr,addr) test_and_set_bit ((nr) ^ 0x18, (addr))
-#define ext2_clear_bit_atomic(lock,nr,addr) test_and_clear_bit((nr) ^ 0x18, (addr))
+#include <asm-generic/bitops/ext2-atomic-test.h>
#include <asm-generic/bitops/minix-le.h>
diff --git a/arch/ia64/include/asm/bitops.h b/arch/ia64/include/asm/bitops.h
index 9da3df6..22ba18b 100644
--- a/arch/ia64/include/asm/bitops.h
+++ b/arch/ia64/include/asm/bitops.h
@@ -457,9 +457,7 @@ static __inline__ unsigned long __arch_hweight64(unsigned long x)
#ifdef __KERNEL__
#include <asm-generic/bitops/ext2-non-atomic.h>
-
-#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a)
-#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a)
+#include <asm-generic/bitops/ext2-atomic-test.h>
#include <asm-generic/bitops/minix.h>
#include <asm-generic/bitops/sched.h>
diff --git a/arch/m68k/include/asm/bitops_mm.h b/arch/m68k/include/asm/bitops_mm.h
index b4ecdaa..776d7b3 100644
--- a/arch/m68k/include/asm/bitops_mm.h
+++ b/arch/m68k/include/asm/bitops_mm.h
@@ -362,9 +362,7 @@ static inline int minix_test_bit(int nr, const void *vaddr)
/* Bitmap functions for the ext2 filesystem. */
#define ext2_set_bit(nr, addr) __test_and_set_bit((nr) ^ 24, (unsigned long *)(addr))
-#define ext2_set_bit_atomic(lock, nr, addr) test_and_set_bit((nr) ^ 24, (unsigned long *)(addr))
#define ext2_clear_bit(nr, addr) __test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr))
-#define ext2_clear_bit_atomic(lock, nr, addr) test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr))
#define ext2_find_next_zero_bit(addr, size, offset) \
generic_find_next_zero_le_bit((unsigned long *)addr, size, offset)
#define ext2_find_next_bit(addr, size, offset) \
@@ -461,6 +459,8 @@ static inline unsigned long generic_find_next_le_bit(const unsigned long *addr,
return (p - addr) * 32 + res;
}
+#include <asm-generic/bitops/ext2-atomic-test.h>
+
#endif /* __KERNEL__ */
#endif /* _M68K_BITOPS_H */
diff --git a/arch/mn10300/include/asm/bitops.h b/arch/mn10300/include/asm/bitops.h
index 3f50e96..23e3a5a 100644
--- a/arch/mn10300/include/asm/bitops.h
+++ b/arch/mn10300/include/asm/bitops.h
@@ -228,11 +228,7 @@ int ffs(int x)
#include <asm-generic/bitops/sched.h>
#include <asm-generic/bitops/hweight.h>
-#define ext2_set_bit_atomic(lock, nr, addr) \
- test_and_set_bit((nr), (addr))
-#define ext2_clear_bit_atomic(lock, nr, addr) \
- test_and_clear_bit((nr), (addr))
-
+#include <asm-generic/bitops/ext2-atomic-test.h>
#include <asm-generic/bitops/ext2-non-atomic.h>
#include <asm-generic/bitops/minix-le.h>
diff --git a/arch/parisc/include/asm/bitops.h b/arch/parisc/include/asm/bitops.h
index 7a6ea10..2bd003d 100644
--- a/arch/parisc/include/asm/bitops.h
+++ b/arch/parisc/include/asm/bitops.h
@@ -223,14 +223,7 @@ static __inline__ int fls(int x)
#ifdef __KERNEL__
#include <asm-generic/bitops/ext2-non-atomic.h>
-
-/* '3' is bits per byte */
-#define LE_BYTE_ADDR ((sizeof(unsigned long) - 1) << 3)
-
-#define ext2_set_bit_atomic(l,nr,addr) \
- test_and_set_bit((nr) ^ LE_BYTE_ADDR, (unsigned long *)addr)
-#define ext2_clear_bit_atomic(l,nr,addr) \
- test_and_clear_bit( (nr) ^ LE_BYTE_ADDR, (unsigned long *)addr)
+#include <asm-generic/bitops/ext2-atomic-test.h>
#endif /* __KERNEL__ */
diff --git a/arch/powerpc/include/asm/bitops.h b/arch/powerpc/include/asm/bitops.h
index 30964ae..d8dba27 100644
--- a/arch/powerpc/include/asm/bitops.h
+++ b/arch/powerpc/include/asm/bitops.h
@@ -307,11 +307,6 @@ unsigned long generic_find_next_le_bit(const unsigned long *addr,
#define ext2_clear_bit(nr, addr) \
__test_and_clear_le_bit((nr), (unsigned long*)addr)
-#define ext2_set_bit_atomic(lock, nr, addr) \
- test_and_set_le_bit((nr), (unsigned long*)addr)
-#define ext2_clear_bit_atomic(lock, nr, addr) \
- test_and_clear_le_bit((nr), (unsigned long*)addr)
-
#define ext2_test_bit(nr, addr) test_le_bit((nr),(unsigned long*)addr)
#define ext2_find_first_zero_bit(addr, size) \
@@ -321,6 +316,9 @@ unsigned long generic_find_next_le_bit(const unsigned long *addr,
#define ext2_find_next_bit(addr, size, off) \
generic_find_next_le_bit((unsigned long *)addr, size, off)
+
+#include <asm-generic/bitops/ext2-atomic-test.h>
+
/* Bitmap functions for the minix filesystem. */
#define minix_test_and_set_bit(nr,addr) \
diff --git a/arch/s390/include/asm/bitops.h b/arch/s390/include/asm/bitops.h
index 2e05972..052b4fb 100644
--- a/arch/s390/include/asm/bitops.h
+++ b/arch/s390/include/asm/bitops.h
@@ -744,12 +744,8 @@ static inline int sched_find_first_bit(unsigned long *b)
#define ext2_set_bit(nr, addr) \
__test_and_set_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
-#define ext2_set_bit_atomic(lock, nr, addr) \
- test_and_set_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
#define ext2_clear_bit(nr, addr) \
__test_and_clear_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
-#define ext2_clear_bit_atomic(lock, nr, addr) \
- test_and_clear_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
#define ext2_test_bit(nr, addr) \
test_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
@@ -834,6 +830,8 @@ static inline int ext2_find_next_bit(void *vaddr, unsigned long size,
return offset + ext2_find_first_bit(p, size);
}
+#include <asm-generic/bitops/ext2-atomic-test.h>
+
#include <asm-generic/bitops/minix.h>
#endif /* __KERNEL__ */
diff --git a/arch/sparc/include/asm/bitops_64.h b/arch/sparc/include/asm/bitops_64.h
index 766121a..fd12692 100644
--- a/arch/sparc/include/asm/bitops_64.h
+++ b/arch/sparc/include/asm/bitops_64.h
@@ -90,11 +90,7 @@ static inline unsigned int __arch_hweight8(unsigned int w)
#ifdef __KERNEL__
#include <asm-generic/bitops/ext2-non-atomic.h>
-
-#define ext2_set_bit_atomic(lock,nr,addr) \
- test_and_set_bit((nr) ^ 0x38,(unsigned long *)(addr))
-#define ext2_clear_bit_atomic(lock,nr,addr) \
- test_and_clear_bit((nr) ^ 0x38,(unsigned long *)(addr))
+#include <asm-generic/bitops/ext2-atomic-test.h>
#include <asm-generic/bitops/minix.h>
diff --git a/arch/x86/include/asm/bitops.h b/arch/x86/include/asm/bitops.h
index 903683b..601f4c4 100644
--- a/arch/x86/include/asm/bitops.h
+++ b/arch/x86/include/asm/bitops.h
@@ -457,11 +457,7 @@ static inline int fls(int x)
#ifdef __KERNEL__
#include <asm-generic/bitops/ext2-non-atomic.h>
-
-#define ext2_set_bit_atomic(lock, nr, addr) \
- test_and_set_bit((nr), (unsigned long *)(addr))
-#define ext2_clear_bit_atomic(lock, nr, addr) \
- test_and_clear_bit((nr), (unsigned long *)(addr))
+#include <asm-generic/bitops/ext2-atomic-test.h>
#include <asm-generic/bitops/minix.h>
diff --git a/arch/xtensa/include/asm/bitops.h b/arch/xtensa/include/asm/bitops.h
index 6c39303..1aa0a5c 100644
--- a/arch/xtensa/include/asm/bitops.h
+++ b/arch/xtensa/include/asm/bitops.h
@@ -107,20 +107,7 @@ static inline unsigned long __fls(unsigned long word)
#include <asm-generic/bitops/fls64.h>
#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/ext2-non-atomic.h>
-
-#ifdef __XTENSA_EL__
-# define ext2_set_bit_atomic(lock,nr,addr) \
- test_and_set_bit((nr), (unsigned long*)(addr))
-# define ext2_clear_bit_atomic(lock,nr,addr) \
- test_and_clear_bit((nr), (unsigned long*)(addr))
-#elif defined(__XTENSA_EB__)
-# define ext2_set_bit_atomic(lock,nr,addr) \
- test_and_set_bit((nr) ^ 0x18, (unsigned long*)(addr))
-# define ext2_clear_bit_atomic(lock,nr,addr) \
- test_and_clear_bit((nr) ^ 0x18, (unsigned long*)(addr))
-#else
-# error processor byte order undefined!
-#endif
+#include <asm-generic/bitops/ext2-atomic-test.h>
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/lock.h>
diff --git a/include/asm-generic/bitops/ext2-atomic-test.h b/include/asm-generic/bitops/ext2-atomic-test.h
new file mode 100644
index 0000000..ece193a
--- /dev/null
+++ b/include/asm-generic/bitops/ext2-atomic-test.h
@@ -0,0 +1,26 @@
+#ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_TEST_H_
+#define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_TEST_H_
+
+/*
+ * Generic implementation of ext2 atomic bit operations
+ * by test_and_set_bit() and test_and_clear_bit()
+ */
+
+#include <asm/byteorder.h>
+
+#if defined(__LITTLE_ENDIAN)
+#define LE_BYTE_ADDR 0
+#elif defined(__BIG_ENDIAN)
+/* '3' is bits per byte */
+#define LE_BYTE_ADDR ((sizeof(unsigned long) - 1) << 3)
+#else
+#error processor byte order undefined!
+#endif
+
+#define ext2_set_bit_atomic(l, nr, addr) \
+ test_and_set_bit((nr) ^ LE_BYTE_ADDR, (unsigned long *)(addr))
+
+#define ext2_clear_bit_atomic(l, nr, addr) \
+ test_and_clear_bit((nr) ^ LE_BYTE_ADDR, (unsigned long *)(addr))
+
+#endif /* _ASM_GENERIC_BITOPS_EXT2_ATOMIC_TEST_H_ */
diff --git a/include/asm-generic/bitops/ext2-atomic.h b/include/asm-generic/bitops/ext2-atomic.h
index ab1c875..151219f 100644
--- a/include/asm-generic/bitops/ext2-atomic.h
+++ b/include/asm-generic/bitops/ext2-atomic.h
@@ -1,6 +1,10 @@
#ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
#define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
+/*
+ * Generic implementation of ext2 atomic bit operations by spinlock
+ */
+
#define ext2_set_bit_atomic(lock, nr, addr) \
({ \
int ret; \
--
1.7.1.231.gd0b16
--
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