mt76: make const array 'data' static, shrinks object size

Commit Message

Colin King Dec. 30, 2018, 1:26 p.m. UTC

From: Colin Ian King <[e-mail]>

Don't populate the const array 'data' on the stack but instead
make it static. Makes the object code smaller by 78 bytes:

Before:
   text    data     bss     dec     hex filename
   5438    1080       0    6518    1976 mediatek/mt76/mt76x2/usb_mcu.o

After:
   text    data     bss     dec     hex filename
   5296    1144       0    6440    1928 mediatek/mt76/mt76x2/usb_mcu.o

(gcc version 8.2.0 x86_64)

Signed-off-by: Colin Ian King <[e-mail]>
---
 drivers/net/wireless/mediatek/mt76/mt76x2/usb_mcu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Felix Fietkau Dec. 31, 2018, 2:41 p.m. UTC | #1

On 2018-12-30 14:26, Colin King wrote:
> From: Colin Ian King <[e-mail]>
> 
> Don't populate the const array 'data' on the stack but instead
> make it static. Makes the object code smaller by 78 bytes:
> 
> Before:
>    text    data     bss     dec     hex filename
>    5438    1080       0    6518    1976 mediatek/mt76/mt76x2/usb_mcu.o
> 
> After:
>    text    data     bss     dec     hex filename
>    5296    1144       0    6440    1928 mediatek/mt76/mt76x2/usb_mcu.o
> 
> (gcc version 8.2.0 x86_64)
> 
> Signed-off-by: Colin Ian King <[e-mail]>
Applied, thanks.

- Felix

Patch

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2/usb_mcu.c b/drivers/net/wireless/mediatek/mt76/mt76x2/usb_mcu.c
index 45a95ee3a415..152d41fe9ff5 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x2/usb_mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2/usb_mcu.c
@@ -39,7 +39,7 @@  static void mt76x2u_mcu_load_ivb(struct mt76x02_dev *dev)
 static void mt76x2u_mcu_enable_patch(struct mt76x02_dev *dev)
 {
 	struct mt76_usb *usb = &dev->mt76.usb;
-	const u8 data[] = {
+	static const u8 data[] = {
 		0x6f, 0xfc, 0x08, 0x01,
 		0x20, 0x04, 0x00, 0x00,
 		0x00, 0x09, 0x00,