2019-10-07 12:04:32

by Colin King

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

From: Colin Ian King <[email protected]>

Don't populate const arrays on the stack but instead make them
static. Makes the object code smaller by 1058 bytes.

Before:
text data bss dec hex filename
29879 6144 0 36023 8cb7 drivers/net/phy/mscc.o

After:
text data bss dec hex filename
28437 6528 0 34965 8895 drivers/net/phy/mscc.o

(gcc version 9.2.1, amd64)

Signed-off-by: Colin Ian King <[email protected]>
---
drivers/net/phy/mscc.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/net/phy/mscc.c b/drivers/net/phy/mscc.c
index 7ada1fd9ca71..805cda3465d7 100644
--- a/drivers/net/phy/mscc.c
+++ b/drivers/net/phy/mscc.c
@@ -895,7 +895,7 @@ static void vsc85xx_tr_write(struct phy_device *phydev, u16 addr, u32 val)
static int vsc8531_pre_init_seq_set(struct phy_device *phydev)
{
int rc;
- const struct reg_val init_seq[] = {
+ static const struct reg_val init_seq[] = {
{0x0f90, 0x00688980},
{0x0696, 0x00000003},
{0x07fa, 0x0050100f},
@@ -939,7 +939,7 @@ static int vsc8531_pre_init_seq_set(struct phy_device *phydev)

static int vsc85xx_eee_init_seq_set(struct phy_device *phydev)
{
- const struct reg_val init_eee[] = {
+ static const struct reg_val init_eee[] = {
{0x0f82, 0x0012b00a},
{0x1686, 0x00000004},
{0x168c, 0x00d2c46f},
@@ -1224,7 +1224,7 @@ static bool vsc8574_is_serdes_init(struct phy_device *phydev)
/* bus->mdio_lock should be locked when using this function */
static int vsc8574_config_pre_init(struct phy_device *phydev)
{
- const struct reg_val pre_init1[] = {
+ static const struct reg_val pre_init1[] = {
{0x0fae, 0x000401bd},
{0x0fac, 0x000f000f},
{0x17a0, 0x00a0f147},
@@ -1272,7 +1272,7 @@ static int vsc8574_config_pre_init(struct phy_device *phydev)
{0x0fee, 0x0004a6a1},
{0x0ffe, 0x00b01807},
};
- const struct reg_val pre_init2[] = {
+ static const struct reg_val pre_init2[] = {
{0x0486, 0x0008a518},
{0x0488, 0x006dc696},
{0x048a, 0x00000912},
@@ -1427,7 +1427,7 @@ static int vsc8574_config_pre_init(struct phy_device *phydev)
/* bus->mdio_lock should be locked when using this function */
static int vsc8584_config_pre_init(struct phy_device *phydev)
{
- const struct reg_val pre_init1[] = {
+ static const struct reg_val pre_init1[] = {
{0x07fa, 0x0050100f},
{0x1688, 0x00049f81},
{0x0f90, 0x00688980},
@@ -1451,7 +1451,7 @@ static int vsc8584_config_pre_init(struct phy_device *phydev)
{0x16b2, 0x00007000},
{0x16b4, 0x00000814},
};
- const struct reg_val pre_init2[] = {
+ static const struct reg_val pre_init2[] = {
{0x0486, 0x0008a518},
{0x0488, 0x006dc696},
{0x048a, 0x00000912},
@@ -1786,7 +1786,7 @@ static int vsc8514_config_pre_init(struct phy_device *phydev)
* values to handle hardware performance of PHY. They
* are set at Power-On state and remain until PHY Reset.
*/
- const struct reg_val pre_init1[] = {
+ static const struct reg_val pre_init1[] = {
{0x0f90, 0x00688980},
{0x0786, 0x00000003},
{0x07fa, 0x0050100f},
--
2.20.1

2019-10-08 19:15:10

by Jakub Kicinski

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

On Mon, 7 Oct 2019 13:03:08 +0100, Colin King wrote:
> From: Colin Ian King <[email protected]>
>
> Don't populate const arrays on the stack but instead make them
> static. Makes the object code smaller by 1058 bytes.
>
> Before:
> text data bss dec hex filename
> 29879 6144 0 36023 8cb7 drivers/net/phy/mscc.o
>
> After:
> text data bss dec hex filename
> 28437 6528 0 34965 8895 drivers/net/phy/mscc.o
>
> (gcc version 9.2.1, amd64)
>
> Signed-off-by: Colin Ian King <[email protected]>

Applied to net-next, thanks.