net/cpsw: optimize the for_each_slave_macro()

text    data     bss     dec     hex filename
15530      92       4   15626    3d0a cpsw.o.before
15478      92       4   15574    3cd6 cpsw.o.after

52 bytes smaller, 13 for each invocation.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 93a60e238146..1c1e7a82f909 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -355,12 +355,15 @@ struct cpsw_priv {
 #define napi_to_priv(napi)      container_of(napi, struct cpsw_priv, napi)
 #define for_each_slave(priv, func, arg...)                              \
         do {                                                            \
-                int idx;                                                \
+                struct cpsw_slave *slave;                               \
+                int n;                                                  \
                 if (priv->data.dual_emac)                               \
                         (func)((priv)->slaves + priv->emac_port, ##arg);\
                 else                                                    \
-                        for (idx = 0; idx < (priv)->data.slaves; idx++) \
-                                (func)((priv)->slaves + idx, ##arg);    \
+                        for (n = (priv)->data.slaves,                   \
+                                        slave = (priv)->slaves;         \
+                                        n; n--)                         \
+                                (func)(slave++, ##arg);                 \
         } while (0)
 #define cpsw_get_slave_ndev(priv, __slave_no__)                         \
         (priv->slaves[__slave_no__].ndev)