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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 <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -39,14 +39,6 @@ config ARCH_REUSE_HOST_VSYSCALL_AREA
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bool
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bool
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default y
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default y
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config GENERIC_FIND_FIRST_BIT
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bool
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default y
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config GENERIC_FIND_NEXT_BIT
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bool
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default y
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config GENERIC_HWEIGHT
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config GENERIC_HWEIGHT
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bool
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bool
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default y
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default y
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@ -34,14 +34,6 @@ config SMP_BROKEN
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bool
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bool
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default y
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default y
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config GENERIC_FIND_FIRST_BIT
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bool
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default y
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config GENERIC_FIND_NEXT_BIT
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bool
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default y
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config GENERIC_HWEIGHT
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config GENERIC_HWEIGHT
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bool
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bool
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default y
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default y
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@ -77,12 +77,6 @@ config GENERIC_BUG
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def_bool y
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def_bool y
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depends on BUG
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depends on BUG
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config GENERIC_FIND_FIRST_BIT
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def_bool y
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config GENERIC_FIND_NEXT_BIT
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def_bool y
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config GENERIC_HWEIGHT
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config GENERIC_HWEIGHT
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def_bool y
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def_bool y
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@ -278,6 +278,11 @@ config GENERIC_CPU
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endchoice
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endchoice
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config X86_CPU
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def_bool y
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select GENERIC_FIND_FIRST_BIT
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select GENERIC_FIND_NEXT_BIT
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config X86_GENERIC
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config X86_GENERIC
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bool "Generic x86 support"
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bool "Generic x86 support"
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depends on X86_32
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depends on X86_32
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@ -7,6 +7,12 @@ menu "Library routines"
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config BITREVERSE
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config BITREVERSE
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tristate
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tristate
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config GENERIC_FIND_FIRST_BIT
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def_bool n
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config GENERIC_FIND_NEXT_BIT
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def_bool n
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config CRC_CCITT
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config CRC_CCITT
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tristate "CRC-CCITT functions"
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tristate "CRC-CCITT functions"
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help
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help
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