diff options
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index accb166791c7..482f7f357f75 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -6640,26 +6640,33 @@ static unsigned long page_table_shareable(struct vm_area_struct *svma, return saddr; } -static bool vma_shareable(struct vm_area_struct *vma, unsigned long addr) +static bool __vma_aligned_range_pmd_shareable(struct vm_area_struct *vma, + unsigned long start, unsigned long end) { - unsigned long base = addr & PUD_MASK; - unsigned long end = base + PUD_SIZE; - /* * check on proper vm_flags and page table alignment */ - if (vma->vm_flags & VM_MAYSHARE && range_in_vma(vma, base, end)) + if (vma->vm_flags & VM_MAYSHARE && range_in_vma(vma, start, end)) return true; return false; } +static bool vma_addr_pmd_shareable(struct vm_area_struct *vma, + unsigned long addr) +{ + unsigned long start = addr & PUD_MASK; + unsigned long end = start + PUD_SIZE; + + return __vma_aligned_range_pmd_shareable(vma, start, end); +} + bool want_pmd_share(struct vm_area_struct *vma, unsigned long addr) { #ifdef CONFIG_USERFAULTFD if (uffd_disable_huge_pmd_share(vma)) return false; #endif - return vma_shareable(vma, addr); + return vma_addr_pmd_shareable(vma, addr); } /* |