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| author | David S. Miller <davem@davemloft.net> | 2014-04-21 05:55:01 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-05-04 09:30:36 +0400 |
| commit | 5b1e94fa439a3227beefad58c28c17f68287a8e9 (patch) | |
| tree | 1629696567bab71bd929bd764b2ffc69a916c20a /arch/sparc/mm/tlb.c | |
| parent | 16ce8a30e6102d7aabd4e4518d255f330290fa3f (diff) | |
| download | linux-5b1e94fa439a3227beefad58c28c17f68287a8e9.tar.xz | |
sparc64: Fix executable bit testing in set_pmd_at() paths.
This code was mistakenly using the exec bit from the PMD in all
cases, even when the PMD isn't a huge PMD.
If it's not a huge PMD, test the exec bit in the individual ptes down
in tlb_batch_pmd_scan().
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/mm/tlb.c')
| -rw-r--r-- | arch/sparc/mm/tlb.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/arch/sparc/mm/tlb.c b/arch/sparc/mm/tlb.c index b12cb5e72812..c07667fcd66e 100644 --- a/arch/sparc/mm/tlb.c +++ b/arch/sparc/mm/tlb.c @@ -134,7 +134,7 @@ no_cache_flush: #ifdef CONFIG_TRANSPARENT_HUGEPAGE static void tlb_batch_pmd_scan(struct mm_struct *mm, unsigned long vaddr, - pmd_t pmd, bool exec) + pmd_t pmd) { unsigned long end; pte_t *pte; @@ -142,8 +142,11 @@ static void tlb_batch_pmd_scan(struct mm_struct *mm, unsigned long vaddr, pte = pte_offset_map(&pmd, vaddr); end = vaddr + HPAGE_SIZE; while (vaddr < end) { - if (pte_val(*pte) & _PAGE_VALID) + if (pte_val(*pte) & _PAGE_VALID) { + bool exec = pte_exec(*pte); + tlb_batch_add_one(mm, vaddr, exec); + } pte++; vaddr += PAGE_SIZE; } @@ -177,15 +180,15 @@ void set_pmd_at(struct mm_struct *mm, unsigned long addr, } if (!pmd_none(orig)) { - pte_t orig_pte = __pte(pmd_val(orig)); - bool exec = pte_exec(orig_pte); - addr &= HPAGE_MASK; if (pmd_trans_huge(orig)) { + pte_t orig_pte = __pte(pmd_val(orig)); + bool exec = pte_exec(orig_pte); + tlb_batch_add_one(mm, addr, exec); tlb_batch_add_one(mm, addr + REAL_HPAGE_SIZE, exec); } else { - tlb_batch_pmd_scan(mm, addr, orig, exec); + tlb_batch_pmd_scan(mm, addr, orig); } } } |