[PATCH] net: phy: mscc: make some arrays static const, makes object smaller

[PATCH] net: phy: mscc: make some arrays static const, makes object smaller

[Colin King]

From: Colin Ian King <colin.king@canonical.com>

Don't populate arrays on the stack but instead them static const.
Makes the object code smaller by 280 bytes.

Before:
   text    data     bss     dec     hex filename
  24142    4368     192   28702    701e ./drivers/net/phy/mscc/mscc_ptp.o

After:
   text    data     bss     dec     hex filename
  23830    4400     192   28422    6f06 ./drivers/net/phy/mscc/mscc_ptp.o

(gcc version 10.2.0)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/net/phy/mscc/mscc_ptp.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/phy/mscc/mscc_ptp.c b/drivers/net/phy/mscc/mscc_ptp.c
index 924ed5b034a4..edb951695b13 100644
--- a/drivers/net/phy/mscc/mscc_ptp.c
+++ b/drivers/net/phy/mscc/mscc_ptp.c
@@ -506,7 +506,7 @@ static int vsc85xx_ptp_cmp_init(struct phy_device *phydev, enum ts_blk blk)
 {
 	struct vsc8531_private *vsc8531 = phydev->priv;
 	bool base = phydev->mdio.addr == vsc8531->ts_base_addr;
-	u8 msgs[] = {
+	static const u8 msgs[] = {
 		PTP_MSGTYPE_SYNC,
 		PTP_MSGTYPE_DELAY_REQ
 	};
@@ -847,7 +847,7 @@ static int vsc85xx_ts_ptp_action_flow(struct phy_device *phydev, enum ts_blk blk
 static int vsc85xx_ptp_conf(struct phy_device *phydev, enum ts_blk blk,
 			    bool one_step, bool enable)
 {
-	u8 msgs[] = {
+	static const u8 msgs[] = {
 		PTP_MSGTYPE_SYNC,
 		PTP_MSGTYPE_DELAY_REQ
 	};
@@ -1268,8 +1268,8 @@ static void vsc8584_set_input_clk_configured(struct phy_device *phydev)
 static int __vsc8584_init_ptp(struct phy_device *phydev)
 {
 	struct vsc8531_private *vsc8531 = phydev->priv;
-	u32 ltc_seq_e[] = { 0, 400000, 0, 0, 0 };
-	u8  ltc_seq_a[] = { 8, 6, 5, 4, 2 };
+	static const u32 ltc_seq_e[] = { 0, 400000, 0, 0, 0 };
+	static const u8  ltc_seq_a[] = { 8, 6, 5, 4, 2 };
 	u32 val;
 
 	if (!vsc8584_is_1588_input_clk_configured(phydev)) {
-- 
2.31.1

Re: [PATCH] net: phy: mscc: make some arrays static const, makes object smaller

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Sun,  1 Aug 2021 08:01:55 +0100 you wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> Don't populate arrays on the stack but instead them static const.
> Makes the object code smaller by 280 bytes.
> 
> Before:
>    text    data     bss     dec     hex filename
>   24142    4368     192   28702    701e ./drivers/net/phy/mscc/mscc_ptp.o
> 
> [...]

Here is the summary with links:
  - net: phy: mscc: make some arrays static const, makes object smaller
    https://git.kernel.org/netdev/net-next/c/1187c8c4642d

You are awesome, thank you!
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