From: Alexander van Heukelum Date: Fri, 25 Apr 2008 11:12:53 +0000 (+0200) Subject: x86, bitops: select the generic bitmap search functions X-Git-Tag: v2.6.26-rc1~1037^2 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=19870def587554c4055df3e74a21508e3647fb7e;p=linux-2.6 x86, bitops: select the generic bitmap search functions Introduce GENERIC_FIND_FIRST_BIT and GENERIC_FIND_NEXT_BIT in lib/Kconfig, defaulting to off. An arch that wants to use the generic implementation now only has to use a select statement to include them. I added an always-y option (X86_CPU) to arch/x86/Kconfig.cpu and used that to select the generic search functions. This way ARCH=um SUBARCH=i386 automatically picks up the change too, and arch/um/Kconfig.i386 can therefore be simplified a bit. ARCH=um SUBARCH=x86_64 does things differently, but still compiles fine. It seems that a "def_bool y" always wins over a "def_bool n"? Signed-off-by: Alexander van Heukelum Signed-off-by: Ingo Molnar --- diff --git a/arch/um/Kconfig.i386 b/arch/um/Kconfig.i386 index 49990ea422..e09edfa560 100644 --- a/arch/um/Kconfig.i386 +++ b/arch/um/Kconfig.i386 @@ -39,14 +39,6 @@ config ARCH_REUSE_HOST_VSYSCALL_AREA bool default y -config GENERIC_FIND_FIRST_BIT - bool - default y - -config GENERIC_FIND_NEXT_BIT - bool - default y - config GENERIC_HWEIGHT bool default y diff --git a/arch/um/Kconfig.x86_64 b/arch/um/Kconfig.x86_64 index cc42e59585..5696e7b374 100644 --- a/arch/um/Kconfig.x86_64 +++ b/arch/um/Kconfig.x86_64 @@ -34,14 +34,6 @@ config SMP_BROKEN bool default y -config GENERIC_FIND_FIRST_BIT - bool - default y - -config GENERIC_FIND_NEXT_BIT - bool - default y - config GENERIC_HWEIGHT bool default y diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 700447738e..2fadf79448 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -77,12 +77,6 @@ config GENERIC_BUG def_bool y depends on BUG -config GENERIC_FIND_FIRST_BIT - def_bool y - -config GENERIC_FIND_NEXT_BIT - def_bool y - config GENERIC_HWEIGHT def_bool y diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu index cf3ff2c5ce..7ef18b01f0 100644 --- a/arch/x86/Kconfig.cpu +++ b/arch/x86/Kconfig.cpu @@ -278,6 +278,11 @@ config GENERIC_CPU endchoice +config X86_CPU + def_bool y + select GENERIC_FIND_FIRST_BIT + select GENERIC_FIND_NEXT_BIT + config X86_GENERIC bool "Generic x86 support" depends on X86_32 diff --git a/lib/Kconfig b/lib/Kconfig index 2d53dc092e..8cc8e8722a 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -7,6 +7,12 @@ menu "Library routines" config BITREVERSE tristate +config GENERIC_FIND_FIRST_BIT + def_bool n + +config GENERIC_FIND_NEXT_BIT + def_bool n + config CRC_CCITT tristate "CRC-CCITT functions" help