Merge 5.9-rc4 into android-mainline

Linux 5.9-rc4

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I3d041935cae5e8f3421edcdee4892f17e2c776ad

mm/madvise.c

@@ -289,9 +289,9 @@ static long madvise_willneed(struct vm_area_struct *vma,
 	 */
 	*prev = NULL;	/* tell sys_madvise we drop mmap_lock */
 	get_file(file);
-	mmap_read_unlock(current->mm);
 	offset = (loff_t)(start - vma->vm_start)
 			+ ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
+	mmap_read_unlock(current->mm);
 	vfs_fadvise(file, offset, end - start, POSIX_FADV_WILLNEED);
 	fput(file);
 	mmap_read_lock(current->mm);