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authorAkinobu Mita <akinobu.mita@gmail.com>2011-03-23 16:41:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-23 19:46:14 -0700
commit0664996b7c2fdb1b7f90954469cc242274abd7db (patch)
tree21bcf25afb94791f87fc5aa8c7e79ac1a8845ad8
parent3f5527fe7e0fb50556b97b8addbe3832985f793e (diff)
bitops: introduce CONFIG_GENERIC_FIND_BIT_LE
This introduces CONFIG_GENERIC_FIND_BIT_LE to tell whether to use generic implementation of find_*_bit_le() in lib/find_next_bit.c or not. For now we select CONFIG_GENERIC_FIND_BIT_LE for all architectures which enable CONFIG_GENERIC_FIND_NEXT_BIT. But m68knommu wants to define own faster find_next_zero_bit_le() and continues using generic find_next_{,zero_}bit(). (CONFIG_GENERIC_FIND_NEXT_BIT and !CONFIG_GENERIC_FIND_BIT_LE) Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Greg Ungerer <gerg@uclinux.org> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/frv/Kconfig4
-rw-r--r--arch/h8300/Kconfig4
-rw-r--r--arch/m32r/Kconfig4
-rw-r--r--arch/m68knommu/Kconfig4
-rw-r--r--arch/microblaze/Kconfig3
-rw-r--r--arch/mips/Kconfig4
-rw-r--r--arch/parisc/Kconfig4
-rw-r--r--arch/powerpc/Kconfig4
-rw-r--r--arch/sh/Kconfig3
-rw-r--r--arch/sparc/Kconfig4
-rw-r--r--arch/xtensa/Kconfig3
-rw-r--r--lib/Kconfig3
-rw-r--r--lib/Makefile1
-rw-r--r--lib/find_next_bit.c3
14 files changed, 48 insertions, 0 deletions
diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index 747499a1b31e..f6037b2da25e 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -22,6 +22,10 @@ config GENERIC_FIND_NEXT_BIT
bool
default y
+config GENERIC_FIND_BIT_LE
+ bool
+ default y
+
config GENERIC_HWEIGHT
bool
default y
diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 6df692d1475f..9624db193e3c 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -45,6 +45,10 @@ config GENERIC_FIND_NEXT_BIT
bool
default y
+config GENERIC_FIND_BIT_LE
+ bool
+ default y
+
config GENERIC_HWEIGHT
bool
default y
diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
index ef4c1e442be3..62afe23c9a49 100644
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig
@@ -260,6 +260,10 @@ config GENERIC_FIND_NEXT_BIT
bool
default y
+config GENERIC_FIND_BIT_LE
+ bool
+ default y
+
config GENERIC_HWEIGHT
bool
default y
diff --git a/arch/m68knommu/Kconfig b/arch/m68knommu/Kconfig
index b5424cf948e6..5795f58728ca 100644
--- a/arch/m68knommu/Kconfig
+++ b/arch/m68knommu/Kconfig
@@ -42,6 +42,10 @@ config GENERIC_FIND_NEXT_BIT
bool
default y
+config GENERIC_FIND_BIT_LE
+ bool
+ default y
+
config GENERIC_GPIO
bool
default n
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 922c4194c7bb..5f0cf0e32653 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -37,6 +37,9 @@ config ARCH_HAS_ILOG2_U64
config GENERIC_FIND_NEXT_BIT
def_bool y
+config GENERIC_FIND_BIT_LE
+ def_bool y
+
config GENERIC_HWEIGHT
def_bool y
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index d88983516e26..6e9811d40c9f 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -777,6 +777,10 @@ config GENERIC_FIND_NEXT_BIT
bool
default y
+config GENERIC_FIND_BIT_LE
+ bool
+ default y
+
config GENERIC_HWEIGHT
bool
default y
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index fafdf30bea9e..9b1f427cdc37 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -52,6 +52,10 @@ config GENERIC_FIND_NEXT_BIT
bool
default y
+config GENERIC_FIND_BIT_LE
+ bool
+ default y
+
config GENERIC_BUG
bool
default y
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 71ba04721beb..ce9ff55e1026 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -95,6 +95,10 @@ config GENERIC_FIND_NEXT_BIT
bool
default y
+config GENERIC_FIND_BIT_LE
+ bool
+ default y
+
config GENERIC_GPIO
bool
help
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 2d264fa84959..1fbf0c7583d0 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -75,6 +75,9 @@ config GENERIC_CSUM
config GENERIC_FIND_NEXT_BIT
def_bool y
+config GENERIC_FIND_BIT_LE
+ def_bool y
+
config GENERIC_HWEIGHT
def_bool y
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index e48f471be547..f766e6bf370e 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -192,6 +192,10 @@ config GENERIC_FIND_NEXT_BIT
bool
default y
+config GENERIC_FIND_BIT_LE
+ bool
+ default y
+
config GENERIC_HWEIGHT
bool
default y if !ULTRA_HAS_POPULATION_COUNT
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index d373d159e75e..72839190f503 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -21,6 +21,9 @@ config RWSEM_XCHGADD_ALGORITHM
config GENERIC_FIND_NEXT_BIT
def_bool y
+config GENERIC_FIND_BIT_LE
+ def_bool y
+
config GENERIC_HWEIGHT
def_bool y
diff --git a/lib/Kconfig b/lib/Kconfig
index 3a55a43c43eb..23fa7a359db7 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -22,6 +22,9 @@ config GENERIC_FIND_FIRST_BIT
config GENERIC_FIND_NEXT_BIT
bool
+config GENERIC_FIND_BIT_LE
+ bool
+
config GENERIC_FIND_LAST_BIT
bool
default y
diff --git a/lib/Makefile b/lib/Makefile
index 8c9de027ebb1..d7872b5c4c1c 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -40,6 +40,7 @@ lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
lib-$(CONFIG_GENERIC_FIND_FIRST_BIT) += find_next_bit.o
lib-$(CONFIG_GENERIC_FIND_NEXT_BIT) += find_next_bit.o
+lib-$(CONFIG_GENERIC_FIND_BIT_LE) += find_next_bit.o
obj-$(CONFIG_GENERIC_FIND_LAST_BIT) += find_last_bit.o
CFLAGS_hweight.o = $(subst $(quote),,$(CONFIG_ARCH_HWEIGHT_CFLAGS))
diff --git a/lib/find_next_bit.c b/lib/find_next_bit.c
index 7667c3d907d3..b0a8767282bf 100644
--- a/lib/find_next_bit.c
+++ b/lib/find_next_bit.c
@@ -160,6 +160,7 @@ EXPORT_SYMBOL(find_first_zero_bit);
#endif /* CONFIG_GENERIC_FIND_FIRST_BIT */
#ifdef __BIG_ENDIAN
+#ifdef CONFIG_GENERIC_FIND_BIT_LE
/* include/linux/byteorder does not support "unsigned long" type */
static inline unsigned long ext2_swabp(const unsigned long * x)
@@ -273,4 +274,6 @@ found_middle_swap:
return result + __ffs(ext2_swab(tmp));
}
EXPORT_SYMBOL(find_next_bit_le);
+
+#endif /* CONFIG_GENERIC_FIND_BIT_LE */
#endif /* __BIG_ENDIAN */

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