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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-02-09 17:33:46 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-02-09 19:36:56 +0100
commit15490ef8ff8fd22d677cb5d4f6a98e5a79118dba (patch)
tree62919ba3d4b04787b21bf685401360156eecfd57 /arch/arm/mm
parentLinux 2.6.38-rc4 (diff)
downloadlinux-15490ef8ff8fd22d677cb5d4f6a98e5a79118dba.tar.xz
linux-15490ef8ff8fd22d677cb5d4f6a98e5a79118dba.zip
ARM: Avoid building unsafe kernels on OMAP2 and MX3
OMAP2 (armv6) and MX3 turn off support for the V6K instructions, which when they include support for SMP kernels means that the resulting kernel is unsafe on SMP and can result in corrupted filesystems as we end up using unsafe bitops. Re-enable the use of V6K instructions on such kernels, and let such kernels running on V6 CPUs eat undefined instruction faults which will be much safer than filesystem corruption. Next merge window we can fix this properly (as it requires a much bigger set of changes.) Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm')
-rw-r--r--arch/arm/mm/Kconfig4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 9d30c6f804b9..c9d2d56feced 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -405,7 +405,7 @@ config CPU_V6
config CPU_32v6K
bool "Support ARM V6K processor extensions" if !SMP
depends on CPU_V6 || CPU_V7
- default y if SMP && !(ARCH_MX3 || ARCH_OMAP2)
+ default y if SMP
help
Say Y here if your ARMv6 processor supports the 'K' extension.
This enables the kernel to use some instructions not present
@@ -416,7 +416,7 @@ config CPU_32v6K
# 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