[v2] mm: mmap: Use helper function allow_write_access() in __remove_shared_vm_struct()

Commit Message

Miaohe Lin Sept. 21, 2020, 11:58 a.m. UTC

In commit 1da177e4c3f4 ("Linux-2.6.12-rc2"), the helper allow_write_access
came with the atomic_inc operation of the i_writecount field in the func
__remove_shared_vm_struct(). But it forgot to use this helper function.

Signed-off-by: Miaohe Lin <[e-mail]>
---
 mm/mmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/mm/mmap.c b/mm/mmap.c
index f55e7d7764a0..809b55b6f1c3 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -143,7 +143,7 @@  static void __remove_shared_vm_struct(struct vm_area_struct *vma,
 		struct file *file, struct address_space *mapping)
 {
 	if (vma->vm_flags & VM_DENYWRITE)
-		atomic_inc(&file_inode(file)->i_writecount);
+		allow_write_access(file);
 	if (vma->vm_flags & VM_SHARED)
 		mapping_unmap_writable(mapping);