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SubjectRe: [PATCH 1/2] MIPS: Use Kconfig to select CPU_NO_EFFICIENT_FFS

Paul Burton wrote:
> Select CONFIG_CPU_NO_EFFICIENT_FFS via Kconfig when the kernel is
> configured for a pre-MIPS32r1 CPU, rather than defining its equivalent
> in asm/cpu-features.h based upon overrides of cpu_has_mips* macros.
> The latter only works if a platform has an cpu-feature-overrides.h
> header which defines cpu_has_mips* macros, which are not generally
> needed. There are many cases where we know that the target ISA for a
> kernel build is MIPS32r1 or later & thus includes the CLZ instruction,
> without requiring any overrides from the platform. Using Kconfig allows
> us to take those into account, and more naturally make a decision about
> instruction support using information about the target ISA.
> Signed-off-by: Paul Burton <>
> Cc: Andrew Morton <>
> Cc: Zhaoxiu Zeng <>

Series applied to mips-next.


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