swap               78 fs/ext3/namei.c #define swap(x, y) do { typeof(x) z = x; x = y; y = z; } while (0)
swap               78 fs/ext4/namei.c #define swap(x, y) do { typeof(x) z = x; x = y; y = z; } while (0)
swap             1477 kernel/sched_fair.c #define swap(a, b) do { typeof(a) tmp = (a); (a) = (b); (b) = tmp; } while (0)