can: isotp: padlen(): make const array static, makes object smaller

Don't populate the const array plen on the stack but instead it static. Makes
the object code smaller by 926 bytes.

Before:
   text	   data	    bss	    dec	    hex	filename
  26531	   1943	     64	  28538	   6f7a	net/can/isotp.o

After:
   text	   data	    bss	    dec	    hex	filename
  25509	   2039	     64	  27612	   6bdc	net/can/isotp.o

(gcc version 10.2.0)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20201020154203.54711-1-colin.king@canonical.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/net/can/isotp.c b/net/can/isotp.c
index a79287e..d78ab13 100644 (file)
--- a/net/can/isotp.c
+++ b/net/can/isotp.c
@@ -252,14 +252,16 @@ static void isotp_rcv_skb(struct sk_buff *skb, struct sock *sk)
 
 static u8 padlen(u8 datalen)
 {
-       const u8 plen[] = {8, 8, 8, 8, 8, 8, 8, 8, 8,           /* 0 - 8 */
-                          12, 12, 12, 12,                      /* 9 - 12 */
-                          16, 16, 16, 16,                      /* 13 - 16 */
-                          20, 20, 20, 20,                      /* 17 - 20 */
-                          24, 24, 24, 24,                      /* 21 - 24 */
-                          32, 32, 32, 32, 32, 32, 32, 32,      /* 25 - 32 */
-                          48, 48, 48, 48, 48, 48, 48, 48,      /* 33 - 40 */
-                          48, 48, 48, 48, 48, 48, 48, 48};     /* 41 - 48 */
+       static const u8 plen[] = {
+               8, 8, 8, 8, 8, 8, 8, 8, 8,      /* 0 - 8 */
+               12, 12, 12, 12,                 /* 9 - 12 */
+               16, 16, 16, 16,                 /* 13 - 16 */
+               20, 20, 20, 20,                 /* 17 - 20 */
+               24, 24, 24, 24,                 /* 21 - 24 */
+               32, 32, 32, 32, 32, 32, 32, 32, /* 25 - 32 */
+               48, 48, 48, 48, 48, 48, 48, 48, /* 33 - 40 */
+               48, 48, 48, 48, 48, 48, 48, 48  /* 41 - 48 */
+       };
 
        if (datalen > 48)
                return 64;