generic swap(): ext3: remove local swap() macro

Use the new generic implementation.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index 1dd2abe..8d6f965 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -74,10 +74,6 @@
 #define assert(test) J_ASSERT(test)
 #endif
 
-#ifndef swap
-#define swap(x, y) do { typeof(x) z = x; x = y; y = z; } while (0)
-#endif
-
 #ifdef DX_DEBUG
 #define dxtrace(command) command
 #else