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Commit 74ec6751 authored by Johannes Weiner's avatar Johannes Weiner Committed by Linus Torvalds
Browse files

mm: memory: remove ->vm_file check on shared writable vmas 



Shared anonymous mmaps are implemented with shmem files, so all VMAs with
shared writable semantics also have an underlying backing file.

Signed-off-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Acked-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent d9ecee28

mm/memory.c

+2 −5
Original line number Diff line number Diff line
@@ -2127,8 +2127,6 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, 
				balance_dirty_pages_ratelimited(mapping);

			}



			/* file_update_time outside page_lock */

			if (vma->vm_file)

			file_update_time(vma->vm_file);

		}

		put_page(dirty_page);
@@ -2971,8 +2969,7 @@ static int do_shared_fault(struct mm_struct *mm, struct vm_area_struct *vma, 
		balance_dirty_pages_ratelimited(mapping);

	}



	/* file_update_time outside page_lock */

	if (vma->vm_file && !vma->vm_ops->page_mkwrite)

	if (!vma->vm_ops->page_mkwrite)

		file_update_time(vma->vm_file);



	return ret;