[PATCH] mm: perform the mapping_map_writable() check after call_mmap()

[Lorenzo Stoakes]

Do not set writable_file_mapping in an instance where it is not appropriate
to do so.

Signed-off-by: Lorenzo Stoakes <lstoakes@xxxxxxxxx>
---
 mm/mmap.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 7f45a08e7973..8b57e42fd980 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2923,10 +2923,8 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
 	mm->map_count++;
 	if (vma->vm_file) {
 		i_mmap_lock_write(vma->vm_file->f_mapping);
-		if (vma_is_shared_maywrite(vma)) {
+		if (vma_is_shared_maywrite(vma))
 			mapping_allow_writable(vma->vm_file->f_mapping);
-			writable_file_mapping = true;
-		}
 
 		flush_dcache_mmap_lock(vma->vm_file->f_mapping);
 		vma_interval_tree_insert(vma, &vma->vm_file->f_mapping->i_mmap);
-- 
2.42.0