> -----Original Message-----
> From: Dave Martin [mailto:[email protected]]
> Sent: Thursday, December 09, 2010 5:30 PM
> To: [email protected]
> Cc: Dave Martin; Santosh Shilimkar; [email protected]
> Subject: [PATCH 1/2] ARM: Thumb-2: Make CONFIG_THUMB2_KERNEL depend
> on !CPU_V6
>
> This makes sense, because Thumb-2 code can't execute on plain
> ARMv6 processors.
>
> This will avoid accidentally configuring a broken kernel where the
> config otherwise would allow multiple architecture versions to
> coexist in the same kernel.
>
> Not adding !CPU_V5 etc., because the chance of anyone trying to
> put v5 and v7 in the same kernel is low, and I'm not aware of
> any mach which can do this. These could be added later if it
> matters.
>
> Note that the rules may need to be refined if support for the
> ARM1156J(F)-S processor is later added to the kernel, since this
> processor supports the rare ARMv6T2 extensions, which add support
> for Thumb-2 and a few other ARMv7 features.
>
> Signed-off-by: Dave Martin <[email protected]>
> Acked-by: Catalin Marinas <[email protected]>
If you like,
Acked-by: Santosh Shilimkar <[email protected]>
> ---
> arch/arm/Kconfig | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index db524e7..f9ca7f3 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -1311,7 +1311,7 @@ config HZ
>
> config THUMB2_KERNEL
> bool "Compile the kernel in Thumb-2 mode"
> - depends on CPU_V7 && EXPERIMENTAL
> + depends on CPU_V7 && !CPU_V6 && EXPERIMENTAL
> select AEABI
> select ARM_ASM_UNIFIED
> help
> --
> 1.7.1
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