diff options
Diffstat (limited to 'mm/mprotect.c')
| -rw-r--r-- | mm/mprotect.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c index 9402080d0d4a..5a688a2756be 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -88,7 +88,13 @@ static inline void change_pmd_range(struct vm_area_struct *vma, pud_t *pud, pmd = pmd_offset(pud, addr); do { next = pmd_addr_end(addr, end); - split_huge_page_pmd(vma->vm_mm, pmd); + if (pmd_trans_huge(*pmd)) { + if (next - addr != HPAGE_PMD_SIZE) + split_huge_page_pmd(vma->vm_mm, pmd); + else if (change_huge_pmd(vma, pmd, addr, newprot)) + continue; + /* fall through */ + } if (pmd_none_or_clear_bad(pmd)) continue; change_pte_range(vma->vm_mm, pmd, addr, next, newprot, |