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| author | Will Deacon | 2015-07-16 20:26:02 +0200 |
|---|---|---|
| committer | Will Deacon | 2015-07-27 12:08:39 +0200 |
| commit | cba3574fd56be8132a19e4aa6b1d41a12c56d990 (patch) | |
| tree | 8cf0134b9f3111964fc9eaa88ffdb5e16448f4da /arch/arm64/include/asm/pgtable.h | |
| parent | arm64: consolidate __swiotlb_mmap (diff) | |
| download | kernel-qcow2-linux-cba3574fd56be8132a19e4aa6b1d41a12c56d990.tar.gz kernel-qcow2-linux-cba3574fd56be8132a19e4aa6b1d41a12c56d990.tar.xz kernel-qcow2-linux-cba3574fd56be8132a19e4aa6b1d41a12c56d990.zip | |
arm64: move update_mmu_cache() into asm/pgtable.h
Mark Brown reported an allnoconfig build failure in -next:
Today's linux-next fails to build an arm64 allnoconfig due to "mm:
make GUP handle pfn mapping unless FOLL_GET is requested" which
causes:
> arm64-allnoconfig
> ../mm/gup.c:51:4: error: implicit declaration of function
'update_mmu_cache' [-Werror=implicit-function-declaration]
Fix the error by moving the function to asm/pgtable.h, as is the case
for most other architectures.
Reported-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/pgtable.h')
| -rw-r--r-- | arch/arm64/include/asm/pgtable.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 56283f8a675c..4d5c812847e9 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -505,6 +505,21 @@ extern int kern_addr_valid(unsigned long addr); #define pgtable_cache_init() do { } while (0) +/* + * On AArch64, the cache coherency is handled via the set_pte_at() function. + */ +static inline void update_mmu_cache(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep) +{ + /* + * set_pte() does not have a DSB for user mappings, so make sure that + * the page table write is visible. + */ + dsb(ishst); +} + +#define update_mmu_cache_pmd(vma, address, pmd) do { } while (0) + #endif /* !__ASSEMBLY__ */ #endif /* __ASM_PGTABLE_H */ |