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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>
This commit is contained in:
Will Deacon 2015-07-16 19:26:02 +01:00
parent aaf6f2f098
commit cba3574fd5
2 changed files with 15 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
arch/arm64/include/asm/pgtable.h
View File

@ -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 */

14
arch/arm64/include/asm/tlbflush.h
View File

@ -154,20 +154,6 @@ static inline void __flush_tlb_pgtable(struct mm_struct *mm,
asm("tlbi vae1is, %0" : : "r" (addr));
dsb(ish);
}
/*
* 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