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powerpc: Fix build break due to paca mm_context_t changes 

Commit 2fc251a8dd ("powerpc: Copy only required pieces of the
mm_context_t to the paca") broke the build for CONFIG_PPC_STD_MMU_64=y
and CONFIG_PPC_MM_SLICES=n.

That only happens for a kernel built with 4K pages and HUGETLB disabled,
which is why we missed it.

Fix it by adding a mm_ctx_user_psize member to the paca and populating
it in the appropriate places.

Fixes: 2fc251a8dd ("powerpc: Copy only required pieces of the mm_context_t to the paca")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman 2016-01-09 08:25:01 +11:00
parent 7b8ad495d5
commit c33e54fafa
2 changed files with 3 additions and 1 deletions
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2
arch/powerpc/include/asm/paca.h
View File

@ -138,6 +138,7 @@ struct paca_struct {
u64 mm_ctx_low_slices_psize;
unsigned char mm_ctx_high_slices_psize[SLICE_ARRAY_SIZE];
#else
u16 mm_ctx_user_psize;
u16 mm_ctx_sllp;
#endif
#endif
@ -212,6 +213,7 @@ static inline void copy_mm_to_paca(mm_context_t *context)
memcpy(&get_paca()->mm_ctx_high_slices_psize,
&context->high_slices_psize, SLICE_ARRAY_SIZE);
#else
get_paca()->mm_ctx_user_psize = context->user_psize;
get_paca()->mm_ctx_sllp = context->sllp;
#endif
}

2
arch/powerpc/mm/hash_utils_64.c
View File

@ -866,7 +866,7 @@ static unsigned int get_paca_psize(unsigned long addr)
#else
unsigned int get_paca_psize(unsigned long addr)
{
return get_paca()->context.user_psize;
return get_paca()->mm_ctx_user_psize;
}
#endif