The patch titled
bitops: add #ifndef for each of find bitops
has been added to the -mm tree. Its filename is
bitops-add-ifndef-for-each-of-find-bitops.patch
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------------------------------------------------------
Subject: bitops: add #ifndef for each of find bitops
From: Akinobu Mita <akinobu.mita@xxxxxxxxx>
The style that we normally use in asm-generic is to test the macro itself
for existence, so in asm-generic, do:
#ifndef find_next_zero_bit_le
extern unsigned long find_next_zero_bit_le(const void *addr,
unsigned long size, unsigned long offset);
#endif
and in the architectures, write
static inline unsigned long find_next_zero_bit_le(const void *addr,
unsigned long size, unsigned long offset)
#define find_next_zero_bit_le find_next_zero_bit_le
This adds the #ifndef for each of the find bitops in the generic header
and source files.
Suggested-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Greg Ungerer <gerg@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-generic/bitops/find.h | 4 ++++
include/asm-generic/bitops/le.h | 7 +++++++
include/linux/bitops.h | 2 ++
lib/find_last_bit.c | 4 ++++
lib/find_next_bit.c | 12 ++++++++++++
5 files changed, 29 insertions(+)
diff -puN include/asm-generic/bitops/find.h~bitops-add-ifndef-for-each-of-find-bitops include/asm-generic/bitops/find.h
--- a/include/asm-generic/bitops/find.h~bitops-add-ifndef-for-each-of-find-bitops
+++ a/include/asm-generic/bitops/find.h
@@ -1,6 +1,7 @@
#ifndef _ASM_GENERIC_BITOPS_FIND_H_
#define _ASM_GENERIC_BITOPS_FIND_H_
+#ifndef find_next_bit
/**
* find_next_bit - find the next set bit in a memory region
* @addr: The address to base the search on
@@ -9,7 +10,9 @@
*/
extern unsigned long find_next_bit(const unsigned long *addr, unsigned long
size, unsigned long offset);
+#endif
+#ifndef find_next_zero_bit
/**
* find_next_zero_bit - find the next cleared bit in a memory region
* @addr: The address to base the search on
@@ -18,6 +21,7 @@ extern unsigned long find_next_bit(const
*/
extern unsigned long find_next_zero_bit(const unsigned long *addr, unsigned
long size, unsigned long offset);
+#endif
#ifdef CONFIG_GENERIC_FIND_FIRST_BIT
diff -puN include/asm-generic/bitops/le.h~bitops-add-ifndef-for-each-of-find-bitops include/asm-generic/bitops/le.h
--- a/include/asm-generic/bitops/le.h~bitops-add-ifndef-for-each-of-find-bitops
+++ a/include/asm-generic/bitops/le.h
@@ -30,13 +30,20 @@ static inline unsigned long find_first_z
#define BITOP_LE_SWIZZLE ((BITS_PER_LONG-1) & ~0x7)
+#ifndef find_next_zero_bit_le
extern unsigned long find_next_zero_bit_le(const void *addr,
unsigned long size, unsigned long offset);
+#endif
+
+#ifndef find_next_bit_le
extern unsigned long find_next_bit_le(const void *addr,
unsigned long size, unsigned long offset);
+#endif
+#ifndef find_first_zero_bit_le
#define find_first_zero_bit_le(addr, size) \
find_next_zero_bit_le((addr), (size), 0)
+#endif
#else
#error "Please fix <asm/byteorder.h>"
diff -puN include/linux/bitops.h~bitops-add-ifndef-for-each-of-find-bitops include/linux/bitops.h
--- a/include/linux/bitops.h~bitops-add-ifndef-for-each-of-find-bitops
+++ a/include/linux/bitops.h
@@ -149,6 +149,7 @@ static inline unsigned long __ffs64(u64
#ifdef __KERNEL__
#ifdef CONFIG_GENERIC_FIND_LAST_BIT
+#ifndef find_last_bit
/**
* find_last_bit - find the last set bit in a memory region
* @addr: The address to start the search at
@@ -158,6 +159,7 @@ static inline unsigned long __ffs64(u64
*/
extern unsigned long find_last_bit(const unsigned long *addr,
unsigned long size);
+#endif
#endif /* CONFIG_GENERIC_FIND_LAST_BIT */
#endif /* __KERNEL__ */
diff -puN lib/find_last_bit.c~bitops-add-ifndef-for-each-of-find-bitops lib/find_last_bit.c
--- a/lib/find_last_bit.c~bitops-add-ifndef-for-each-of-find-bitops
+++ a/lib/find_last_bit.c
@@ -15,6 +15,8 @@
#include <asm/types.h>
#include <asm/byteorder.h>
+#ifndef find_last_bit
+
unsigned long find_last_bit(const unsigned long *addr, unsigned long size)
{
unsigned long words;
@@ -43,3 +45,5 @@ found:
return size;
}
EXPORT_SYMBOL(find_last_bit);
+
+#endif
diff -puN lib/find_next_bit.c~bitops-add-ifndef-for-each-of-find-bitops lib/find_next_bit.c
--- a/lib/find_next_bit.c~bitops-add-ifndef-for-each-of-find-bitops
+++ a/lib/find_next_bit.c
@@ -17,6 +17,7 @@
#define BITOP_WORD(nr) ((nr) / BITS_PER_LONG)
#ifdef CONFIG_GENERIC_FIND_NEXT_BIT
+#ifndef find_next_bit
/*
* Find the next set bit in a memory region.
*/
@@ -59,7 +60,9 @@ found_middle:
return result + __ffs(tmp);
}
EXPORT_SYMBOL(find_next_bit);
+#endif
+#ifndef find_next_zero_bit
/*
* This implementation of find_{first,next}_zero_bit was stolen from
* Linus' asm-alpha/bitops.h.
@@ -103,9 +106,11 @@ found_middle:
return result + ffz(tmp);
}
EXPORT_SYMBOL(find_next_zero_bit);
+#endif
#endif /* CONFIG_GENERIC_FIND_NEXT_BIT */
#ifdef CONFIG_GENERIC_FIND_FIRST_BIT
+#ifndef find_first_bit
/*
* Find the first set bit in a memory region.
*/
@@ -131,7 +136,9 @@ found:
return result + __ffs(tmp);
}
EXPORT_SYMBOL(find_first_bit);
+#endif
+#ifndef find_first_zero_bit
/*
* Find the first cleared bit in a memory region.
*/
@@ -157,6 +164,7 @@ found:
return result + ffz(tmp);
}
EXPORT_SYMBOL(find_first_zero_bit);
+#endif
#endif /* CONFIG_GENERIC_FIND_FIRST_BIT */
#ifdef __BIG_ENDIAN
@@ -186,6 +194,7 @@ static inline unsigned long ext2_swab(co
#endif
}
+#ifndef find_next_zero_bit_le
unsigned long find_next_zero_bit_le(const void *addr, unsigned
long size, unsigned long offset)
{
@@ -229,7 +238,9 @@ found_middle_swap:
return result + ffz(ext2_swab(tmp));
}
EXPORT_SYMBOL(find_next_zero_bit_le);
+#endif
+#ifndef find_next_bit_le
unsigned long find_next_bit_le(const void *addr, unsigned
long size, unsigned long offset)
{
@@ -274,6 +285,7 @@ found_middle_swap:
return result + __ffs(ext2_swab(tmp));
}
EXPORT_SYMBOL(find_next_bit_le);
+#endif
#endif /* CONFIG_GENERIC_FIND_BIT_LE */
#endif /* __BIG_ENDIAN */
_
Patches currently in -mm which might be from akinobu.mita@xxxxxxxxx are
linux-next.patch
arch-add-define-for-each-of-optimized-find-bitops.patch
bitops-add-ifndef-for-each-of-find-bitops.patch
arch-remove-config_generic_find_next_bitbit_lelast_bit.patch
arm-use-asm-generic-bitops-leh.patch
s390-use-asm-generic-bitops-leh.patch
m68knommu-fix-build-error-due-to-the-lack-of-find_next_bit_le.patch
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