* [PATCH] b43: make const arrays static, reduces object code size
@ 2017-09-22 15:39 Colin King
2017-09-25 8:30 ` Kalle Valo
0 siblings, 1 reply; 2+ messages in thread
From: Colin King @ 2017-09-22 15:39 UTC (permalink / raw)
To: Kalle Valo, linux-wireless, b43-dev, netdev; +Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
Don't populate const arrays on the stack, instead make them static.
Makes the object code smaller by over 60 bytes:
Before:
text data bss dec hex filename
14816 1296 0 16112 3ef0 b43/phy_ht.o
After:
text data bss dec hex filename
14551 1496 0 16047 3eaf b43/phy_ht.o
(gcc 6.3.0, x86-64)
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/net/wireless/broadcom/b43/phy_ht.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/broadcom/b43/phy_ht.c b/drivers/net/wireless/broadcom/b43/phy_ht.c
index 718c90e81696..c3158d085c2b 100644
--- a/drivers/net/wireless/broadcom/b43/phy_ht.c
+++ b/drivers/net/wireless/broadcom/b43/phy_ht.c
@@ -119,7 +119,7 @@ static void b43_radio_2059_rcal(struct b43_wldev *dev)
/* Calibrate the internal RC oscillator? */
static void b43_radio_2057_rccal(struct b43_wldev *dev)
{
- const u16 radio_values[3][2] = {
+ static const u16 radio_values[3][2] = {
{ 0x61, 0xE9 }, { 0x69, 0xD5 }, { 0x73, 0x99 },
};
int i;
@@ -154,7 +154,7 @@ static void b43_radio_2059_init_pre(struct b43_wldev *dev)
static void b43_radio_2059_init(struct b43_wldev *dev)
{
- const u16 routing[] = { R2059_C1, R2059_C2, R2059_C3 };
+ static const u16 routing[] = { R2059_C1, R2059_C2, R2059_C3 };
int i;
/* Prepare (reset?) radio */
@@ -263,7 +263,7 @@ static void b43_phy_ht_reset_cca(struct b43_wldev *dev)
static void b43_phy_ht_zero_extg(struct b43_wldev *dev)
{
u8 i, j;
- u16 base[] = { 0x40, 0x60, 0x80 };
+ static const u16 base[] = { 0x40, 0x60, 0x80 };
for (i = 0; i < ARRAY_SIZE(base); i++) {
for (j = 0; j < 4; j++)
--
2.14.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: b43: make const arrays static, reduces object code size
2017-09-22 15:39 [PATCH] b43: make const arrays static, reduces object code size Colin King
@ 2017-09-25 8:30 ` Kalle Valo
0 siblings, 0 replies; 2+ messages in thread
From: Kalle Valo @ 2017-09-25 8:30 UTC (permalink / raw)
To: Colin Ian King
Cc: linux-wireless, b43-dev, netdev, kernel-janitors, linux-kernel
Colin Ian King <colin.king@canonical.com> wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> Don't populate const arrays on the stack, instead make them static.
> Makes the object code smaller by over 60 bytes:
>
> Before:
> text data bss dec hex filename
> 14816 1296 0 16112 3ef0 b43/phy_ht.o
>
> After:
> text data bss dec hex filename
> 14551 1496 0 16047 3eaf b43/phy_ht.o
>
> (gcc 6.3.0, x86-64)
>
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
Patch applied to wireless-drivers-next.git, thanks.
96cbe3d638e4 b43: make const arrays static, reduces object code size
--
https://patchwork.kernel.org/patch/9966415/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
^ permalink raw reply [flat|nested] 2+ messages in thread
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2017-09-25 8:30 ` Kalle Valo
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