diff options
| author | Thomas Gleixner <[email protected]> | 2021-01-23 21:02:02 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2021-01-24 10:34:52 -0800 |
| commit | a1dce7fd2ade8e71e5f95e58b99aa512607f52b0 (patch) | |
| tree | b848f7b562f63c34c650d24f14502fe8dcfdca06 | |
| parent | f99e02372af2e7ee72a6da497712ec9152964347 (diff) | |
mm/highmem: prepare for overriding set_pte_at()
The generic kmap_local() map function uses set_pte_at(), but MIPS requires
set_pte() and PowerPC wants __set_pte_at().
Provide arch_kmap_local_set_pte() and default it to set_pte_at().
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Andreas Larsson <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Paul Cercueil <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Bogendoerfer <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/highmem.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/mm/highmem.c b/mm/highmem.c index c3a9ea7875ef..874b732b120c 100644 --- a/mm/highmem.c +++ b/mm/highmem.c @@ -473,6 +473,11 @@ static inline void *arch_kmap_local_high_get(struct page *page) } #endif +#ifndef arch_kmap_local_set_pte +#define arch_kmap_local_set_pte(mm, vaddr, ptep, ptev) \ + set_pte_at(mm, vaddr, ptep, ptev) +#endif + /* Unmap a local mapping which was obtained by kmap_high_get() */ static inline bool kmap_high_unmap_local(unsigned long vaddr) { @@ -515,7 +520,7 @@ void *__kmap_local_pfn_prot(unsigned long pfn, pgprot_t prot) vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); BUG_ON(!pte_none(*(kmap_pte - idx))); pteval = pfn_pte(pfn, prot); - set_pte_at(&init_mm, vaddr, kmap_pte - idx, pteval); + arch_kmap_local_set_pte(&init_mm, vaddr, kmap_pte - idx, pteval); arch_kmap_local_post_map(vaddr, pteval); current->kmap_ctrl.pteval[kmap_local_idx()] = pteval; preempt_enable(); |