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>

11 files changed, 41 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