[PATCHv2 18/28] thp: prepare change_huge_pmd() for file thp

["Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>]

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 | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 00f10d323039..8e2d84698c15 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1756,7 +1756,6 @@ 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));
 		}
 		spin_unlock(ptl);
 	}
-- 
2.7.0