mm/filemap.c: remove else after a return

The `else' is not useful after a `return' in __lock_page_or_retry().

[akpm@linux-foundation.org: coding style fixes]

Link: https://lkml.kernel.org/r/20201202154720.115162-1-carver4lio@163.com
Signed-off-by: Hailong Liu<liu.hailong6@zte.com.cn>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/filemap.c

@@ -1583,7 +1583,7 @@ int __lock_page_or_retry(struct page *page, struct mm_struct *mm,
 		else
 			wait_on_page_locked(page);
 		return 0;
-	} else {
+	}
 	if (flags & FAULT_FLAG_KILLABLE) {
 		int ret;
 
@@ -1592,10 +1592,11 @@ int __lock_page_or_retry(struct page *page, struct mm_struct *mm,
 			mmap_read_unlock(mm);
 			return 0;
 		}
-		} else
+	} else {
 		__lock_page(page);
-		return 1;
 	}
+	return 1;
+
 }
 
 /**