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| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-10 13:15:46 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-30 11:57:02 -0400 |
| commit | a718e10cbaa28035b7ab510d68fef68524454e1a (patch) | |
| tree | 64b9283a5d94e2aa78046cc52f47757a8224d8ed /arch/tile/mm/pgtable.c | |
| parent | 35f059761c5ac313d13372fe3cdaa41bce3d0dbf (diff) | |
| download | blackbird-op-linux-a718e10cbaa28035b7ab510d68fef68524454e1a.tar.gz blackbird-op-linux-a718e10cbaa28035b7ab510d68fef68524454e1a.zip | |
tile: handle super huge pages in virt_to_pte
This tile-specific API had a minor bug, in that if a super huge (>4GB)
page mapped a particular address range, we wouldn't handle it correctly.
As part of fixing that bug, I also cleaned up some of the pud and pmd
accessors to make them more consistent.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/mm/pgtable.c')
| -rw-r--r-- | arch/tile/mm/pgtable.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/tile/mm/pgtable.c b/arch/tile/mm/pgtable.c index e41487e22163..300443389671 100644 --- a/arch/tile/mm/pgtable.c +++ b/arch/tile/mm/pgtable.c @@ -338,6 +338,8 @@ pte_t *virt_to_pte(struct mm_struct* mm, unsigned long addr) pud = pud_offset(pgd, addr); if (!pud_present(*pud)) return NULL; + if (pud_huge_page(*pud)) + return (pte_t *)pud; pmd = pmd_offset(pud, addr); if (pmd_huge_page(*pmd)) return (pte_t *)pmd; @@ -345,6 +347,7 @@ pte_t *virt_to_pte(struct mm_struct* mm, unsigned long addr) return NULL; return pte_offset_kernel(pmd, addr); } +EXPORT_SYMBOL(virt_to_pte); pgprot_t set_remote_cache_cpu(pgprot_t prot, int cpu) { |
