Commit 60799c6d authored by Russell King's avatar Russell King
Browse files

ARM: v6k: do not disable CPU_32v6K based on platform selection 



CPU_32v6K controls whether we use the ARMv6K extension instructions in
the kernel, and in some places whether we use SMP-safe code sequences
(eg, bitops.)

MX3 prevents the selection of this option to ensure that it is not
enabled for their CPU, which is ARMv6 only.  Now that we've split the
CPU_V6 option, V6K support won't be offered for MX3 anymore.

OMAP prevents the selection of this option in an attempt to produce a
kernel which runs on architectures from ARMv6 to ARMv7 MPCore.  We now
achieve this in a different way (see the previous patches).

As such, we no longer need to offer this as a configuration option to
the user.

Tested-by: default avatarTony Lindgren <tony@atomide.com>
Tested-by: default avatarSourav Poddar <sourav.poddar@ti.com>
Tested-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 8762df4d

arch/arm/mm/Kconfig

+3 −11
Original line number Diff line number Diff line
@@ -405,7 +405,7 @@ config CPU_V6 
config CPU_V6K

	bool "Support ARM V6K processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB || MACH_REALVIEW_PBX

	select CPU_32v6

	select CPU_32v6K if !ARCH_OMAP2

	select CPU_32v6K

	select CPU_ABRT_EV6

	select CPU_PABRT_V6

	select CPU_CACHE_V6
@@ -418,7 +418,7 @@ config CPU_V6K 
# ARMv7

config CPU_V7

	bool "Support ARM V7 processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB || MACH_REALVIEW_PBX

	select CPU_32v6K if !ARCH_OMAP2

	select CPU_32v6K

	select CPU_32v7

	select CPU_ABRT_EV7

	select CPU_PABRT_V7
@@ -461,15 +461,7 @@ config CPU_32v6 
	select CPU_USE_DOMAINS if CPU_V6 && MMU



config CPU_32v6K

	bool "Support ARM V6K processor extensions" if !SMP

	depends on CPU_V6 || CPU_V6K || CPU_V7

	default y if SMP && !(ARCH_MX3 || ARCH_OMAP2)

	help

	  Say Y here if your ARMv6 processor supports the 'K' extension.

	  This enables the kernel to use some instructions not present

	  on previous processors, and as such a kernel build with this

	  enabled will not boot on processors with do not support these

	  instructions.

	bool



config CPU_32v7

	bool

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