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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-08-16 08:41:40 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-08-20 14:22:14 +0300 |
| commit | d9642117914c9d3f800b3bacc19d7e388b04edb4 (patch) | |
| tree | 778ea9b7d2baecc695d15ba2a9091c01bb78a8e1 /arch/powerpc/include/asm/nohash | |
| parent | ad628a34ec4e3558bf838195f60bbaa4c2b68f2a (diff) | |
| download | linux-d9642117914c9d3f800b3bacc19d7e388b04edb4.tar.xz | |
powerpc/mm: define empty update_mmu_cache() as static inline
Only BOOK3S and FSL_BOOK3E have a usefull update_mmu_cache().
For the others, just define it static inline.
In the meantime, simplify the FSL_BOOK3E related ifdef as
book3e_hugetlb_preload() only exists when CONFIG_PPC_FSL_BOOK3E
is selected.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/668aba4db6b9af6d8a151174e11a4289f1a6bbcd.1565933217.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/include/asm/nohash')
| -rw-r--r-- | arch/powerpc/include/asm/nohash/pgtable.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/nohash/pgtable.h b/arch/powerpc/include/asm/nohash/pgtable.h index 1ca1c1864b32..7fed9dc0f147 100644 --- a/arch/powerpc/include/asm/nohash/pgtable.h +++ b/arch/powerpc/include/asm/nohash/pgtable.h @@ -293,5 +293,18 @@ static inline int pgd_huge(pgd_t pgd) #define is_hugepd(hpd) (hugepd_ok(hpd)) #endif +/* + * This gets called at the end of handling a page fault, when + * the kernel has put a new PTE into the page table for the process. + * We use it to ensure coherency between the i-cache and d-cache + * for the page which has just been mapped in. + */ +#if defined(CONFIG_PPC_FSL_BOOK3E) && defined(CONFIG_HUGETLB_PAGE) +void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep); +#else +static inline +void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep) {} +#endif + #endif /* __ASSEMBLY__ */ #endif |