diff options
| -rw-r--r-- | arch/arm/mm/fault-armv.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/arm/mm/fault-armv.c b/arch/arm/mm/fault-armv.c index fbfa2605844..a8ec97b4752 100644 --- a/arch/arm/mm/fault-armv.c +++ b/arch/arm/mm/fault-armv.c @@ -37,7 +37,7 @@ static int adjust_pte(struct vm_area_struct *vma, unsigned long address) pgd_t *pgd; pmd_t *pmd; pte_t *pte, entry; - int ret = 0; + int ret; pgd = pgd_offset(vma->vm_mm, address); if (pgd_none(*pgd)) @@ -55,15 +55,19 @@ static int adjust_pte(struct vm_area_struct *vma, unsigned long address) entry = *pte; /* + * If this page is present, it's actually being shared. + */ + ret = pte_present(entry); + + /* * If this page isn't present, or is already setup to * fault (ie, is old), we can safely ignore any issues. */ - if (pte_present(entry) && pte_val(entry) & shared_pte_mask) { + if (ret && pte_val(entry) & shared_pte_mask) { flush_cache_page(vma, address, pte_pfn(entry)); pte_val(entry) &= ~shared_pte_mask; set_pte_at(vma->vm_mm, address, pte, entry); flush_tlb_page(vma, address); - ret = 1; } pte_unmap(pte); return ret; |