| Message ID | 1457737157-38573-14-git-send-email-kirill.shutemov@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 0ef06d47bd24..93f5b50490df 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1786,7 +1786,8 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, entry = pmd_mkwrite(entry); ret = HPAGE_PMD_NR; set_pmd_at(mm, addr, pmd, entry); - BUG_ON(!preserve_write && pmd_write(entry)); + BUG_ON(vma_is_anonymous(vma) && !preserve_write && + pmd_write(entry)); } spin_unlock(ptl); }
change_huge_pmd() has assert which is not relvant for file page. For shared mapping it's perfectly fine to have page table entry writable, without explicit mkwrite. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> --- mm/huge_memory.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)