[PATCH v2] powerpc/mm: export current mmu mode info

[Michael Ellerman]

Hari Bathini <hbathini at linux.vnet.ibm.com> writes:

> diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
> index e2fb408..558987c 100644
> --- a/arch/powerpc/include/asm/mmu.h
> +++ b/arch/powerpc/include/asm/mmu.h
> @@ -199,6 +199,21 @@ static inline void mmu_clear_feature(unsigned long feature)
>  
>  extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup;
>  
> +/*
> + * Possible MMU modes
> + */
> +#define MMU_MODE_NONE           0
> +#define MMU_MODE_RADIX          1
> +#define MMU_MODE_HASH           2
> +#define MMU_MODE_HASH32         3
> +#define MMU_MODE_NOHASH         4
> +#define MMU_MODE_NOHASH32       5

These are already defined in the same file:

/*
 * MMU families
 */
#define MMU_FTR_HPTE_TABLE		ASM_CONST(0x00000001)
#define MMU_FTR_TYPE_8xx		ASM_CONST(0x00000002)
#define MMU_FTR_TYPE_40x		ASM_CONST(0x00000004)
#define MMU_FTR_TYPE_44x		ASM_CONST(0x00000008)
#define MMU_FTR_TYPE_FSL_E		ASM_CONST(0x00000010)
#define MMU_FTR_TYPE_47x		ASM_CONST(0x00000020)
#define MMU_FTR_TYPE_RADIX		ASM_CONST(0x00000040)

And the values for the current CPU are in cur_cpu_spec->mmu_features.

So if you must export anything, make it that value, and hopefully the
rest of the patch goes away.

cheers