diff mbox series

[v2] wifi: b43: Constify struct lpphy_tx_gain_table_entry

Message ID e33bc9e6dff4a5b6cd8d0ab5399aa1abac5bef9d.1722753127.git.christophe.jaillet@wanadoo.fr (mailing list archive)
State Accepted
Commit 4ab9f870a6335af27507d1f3bfb29635d956af48
Delegated to: Kalle Valo
Headers show
Series [v2] wifi: b43: Constify struct lpphy_tx_gain_table_entry | expand

Commit Message

Christophe JAILLET Aug. 4, 2024, 6:32 a.m. UTC 
'struct lpphy_tx_gain_table_entry' are not modified in this driver.

Constifying this structure moves some data to a read-only section, so
increase overall security.

On a x86_64, with allmodconfig:
Before:
======
   text	   data	    bss	    dec	    hex	filename
  16481	   6232	      0	  22713	   58b9	drivers/net/wireless/broadcom/b43/tables_lpphy.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
  22305	    395	      0	  22700	   58ac	drivers/net/wireless/broadcom/b43/tables_lpphy.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
Compile tested-only.

lpphy_write_gain_table() and lpphy_write_gain_table_bulk() could also be
made static and removed from tables_lpphy.h, but without knowing the reason
why it is done this way, I've preferred to leave it as-is.

Changes in v2:
  - remove unrelated and un-needed constification   [Michael Büsch]
  - update numbers in the commit log

v1: https://lore.kernel.org/all/38528f48c8069187823b774a6b2a53088f6c9599.1721161231.git.christophe.jaillet@wanadoo.fr/
---
 .../net/wireless/broadcom/b43/tables_lpphy.c  | 20 +++++++++----------
 .../net/wireless/broadcom/b43/tables_lpphy.h  |  2 +-
 2 files changed, 11 insertions(+), 11 deletions(-)

Comments

Michael Büsch Aug. 4, 2024, 8:05 a.m. UTC | #1 
On Sun,  4 Aug 2024 08:32:44 +0200
Christophe JAILLET <christophe.jaillet@wanadoo.fr> wrote:

> 'struct lpphy_tx_gain_table_entry' are not modified in this driver.
> 
> Constifying this structure moves some data to a read-only section, so
> increase overall security.
> 
> On a x86_64, with allmodconfig:
> Before:
> ======
>    text	   data	    bss	    dec	    hex	filename
>   16481	   6232	      0	  22713	   58b9	drivers/net/wireless/broadcom/b43/tables_lpphy.o
> 
> After:
> =====
>    text	   data	    bss	    dec	    hex	filename
>   22305	    395	      0	  22700	   58ac	drivers/net/wireless/broadcom/b43/tables_lpphy.o
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> Compile tested-only.
> 
> lpphy_write_gain_table() and lpphy_write_gain_table_bulk() could also be
> made static and removed from tables_lpphy.h, but without knowing the reason
> why it is done this way, I've preferred to leave it as-is.
> 
> Changes in v2:
>   - remove unrelated and un-needed constification   [Michael Büsch]
>   - update numbers in the commit log


Acked-By: Michael Büsch <m@bues.ch>
Kalle Valo Aug. 7, 2024, 5:16 p.m. UTC | #2 
Christophe JAILLET <christophe.jaillet@wanadoo.fr> wrote:

> 'struct lpphy_tx_gain_table_entry' are not modified in this driver.
> 
> Constifying this structure moves some data to a read-only section, so
> increase overall security.
> 
> On a x86_64, with allmodconfig:
> Before:
> ======
>    text	   data	    bss	    dec	    hex	filename
>   16481	   6232	      0	  22713	   58b9	drivers/net/wireless/broadcom/b43/tables_lpphy.o
> 
> After:
> =====
>    text	   data	    bss	    dec	    hex	filename
>   22305	    395	      0	  22700	   58ac	drivers/net/wireless/broadcom/b43/tables_lpphy.o
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> Acked-By: Michael Büsch <m@bues.ch>

Patch applied to wireless-next.git, thanks.

4ab9f870a633 wifi: b43: Constify struct lpphy_tx_gain_table_entry
diff mbox series

Patch

diff --git a/drivers/net/wireless/broadcom/b43/tables_lpphy.c b/drivers/net/wireless/broadcom/b43/tables_lpphy.c
index 71a7cd8dc787..fb70a1e3544b 100644
--- a/drivers/net/wireless/broadcom/b43/tables_lpphy.c
+++ b/drivers/net/wireless/broadcom/b43/tables_lpphy.c
@@ -1066,7 +1066,7 @@  static const u32 lpphy_papd_mult_table[] = {
 	0x00036963, 0x000339f2, 0x00030a89, 0x0002db28,
 };
 
-static struct lpphy_tx_gain_table_entry lpphy_rev0_nopa_tx_gain_table[] = {
+static const struct lpphy_tx_gain_table_entry lpphy_rev0_nopa_tx_gain_table[] = {
 	{ .gm = 7, .pga = 15, .pad = 14, .dac = 0, .bb_mult = 152, },
 	{ .gm = 7, .pga = 15, .pad = 14, .dac = 0, .bb_mult = 147, },
 	{ .gm = 7, .pga = 15, .pad = 14, .dac = 0, .bb_mult = 143, },
@@ -1197,7 +1197,7 @@  static struct lpphy_tx_gain_table_entry lpphy_rev0_nopa_tx_gain_table[] = {
 	{ .gm = 7, .pga = 11, .pad = 6, .dac = 0, .bb_mult = 71, },
 };
 
-static struct lpphy_tx_gain_table_entry lpphy_rev0_2ghz_tx_gain_table[] = {
+static const struct lpphy_tx_gain_table_entry lpphy_rev0_2ghz_tx_gain_table[] = {
 	{ .gm = 4, .pga = 15, .pad = 9, .dac = 0, .bb_mult = 64, },
 	{ .gm = 4, .pga = 15, .pad = 9, .dac = 0, .bb_mult = 62, },
 	{ .gm = 4, .pga = 15, .pad = 9, .dac = 0, .bb_mult = 60, },
@@ -1328,7 +1328,7 @@  static struct lpphy_tx_gain_table_entry lpphy_rev0_2ghz_tx_gain_table[] = {
 	{ .gm = 4, .pga = 4, .pad = 2, .dac = 0, .bb_mult = 72, },
 };
 
-static struct lpphy_tx_gain_table_entry lpphy_rev0_5ghz_tx_gain_table[] = {
+static const struct lpphy_tx_gain_table_entry lpphy_rev0_5ghz_tx_gain_table[] = {
 	{ .gm = 7, .pga = 15, .pad = 15, .dac = 0, .bb_mult = 99, },
 	{ .gm = 7, .pga = 15, .pad = 15, .dac = 0, .bb_mult = 96, },
 	{ .gm = 7, .pga = 15, .pad = 15, .dac = 0, .bb_mult = 93, },
@@ -1459,7 +1459,7 @@  static struct lpphy_tx_gain_table_entry lpphy_rev0_5ghz_tx_gain_table[] = {
 	{ .gm = 7, .pga = 11, .pad = 6, .dac = 0, .bb_mult = 60, },
 };
 
-static struct lpphy_tx_gain_table_entry lpphy_rev1_nopa_tx_gain_table[] = {
+static const struct lpphy_tx_gain_table_entry lpphy_rev1_nopa_tx_gain_table[] = {
 	{ .gm = 7, .pga = 15, .pad = 14, .dac = 0, .bb_mult = 152, },
 	{ .gm = 7, .pga = 15, .pad = 14, .dac = 0, .bb_mult = 147, },
 	{ .gm = 7, .pga = 15, .pad = 14, .dac = 0, .bb_mult = 143, },
@@ -1599,7 +1599,7 @@  static struct lpphy_tx_gain_table_entry lpphy_rev1_nopa_tx_gain_table[] = {
 	{ .gm = 7, .pga = 11, .pad = 6, .dac = 0, .bb_mult = 71, },
 };
 
-static struct lpphy_tx_gain_table_entry lpphy_rev1_2ghz_tx_gain_table[] = {
+static const struct lpphy_tx_gain_table_entry lpphy_rev1_2ghz_tx_gain_table[] = {
 	{ .gm = 4, .pga = 15, .pad = 15, .dac = 0, .bb_mult = 90, },
 	{ .gm = 4, .pga = 15, .pad = 15, .dac = 0, .bb_mult = 88, },
 	{ .gm = 4, .pga = 15, .pad = 15, .dac = 0, .bb_mult = 85, },
@@ -1730,7 +1730,7 @@  static struct lpphy_tx_gain_table_entry lpphy_rev1_2ghz_tx_gain_table[] = {
 	{ .gm = 4, .pga = 10, .pad = 6, .dac = 0, .bb_mult = 60, },
 };
 
-static struct lpphy_tx_gain_table_entry lpphy_rev1_5ghz_tx_gain_table[] = {
+static const struct lpphy_tx_gain_table_entry lpphy_rev1_5ghz_tx_gain_table[] = {
 	{ .gm = 7, .pga = 15, .pad = 15, .dac = 0, .bb_mult = 99, },
 	{ .gm = 7, .pga = 15, .pad = 15, .dac = 0, .bb_mult = 96, },
 	{ .gm = 7, .pga = 15, .pad = 15, .dac = 0, .bb_mult = 93, },
@@ -1861,7 +1861,7 @@  static struct lpphy_tx_gain_table_entry lpphy_rev1_5ghz_tx_gain_table[] = {
 	{ .gm = 7, .pga = 11, .pad = 6, .dac = 0, .bb_mult = 60, },
 };
 
-static struct lpphy_tx_gain_table_entry lpphy_rev2_nopa_tx_gain_table[] = {
+static const struct lpphy_tx_gain_table_entry lpphy_rev2_nopa_tx_gain_table[] = {
 	{ .gm = 255, .pga = 255, .pad = 203, .dac = 0, .bb_mult = 152, },
 	{ .gm = 255, .pga = 255, .pad = 203, .dac = 0, .bb_mult = 147, },
 	{ .gm = 255, .pga = 255, .pad = 203, .dac = 0, .bb_mult = 143, },
@@ -1992,7 +1992,7 @@  static struct lpphy_tx_gain_table_entry lpphy_rev2_nopa_tx_gain_table[] = {
 	{ .gm = 255, .pga = 111, .pad = 29, .dac = 0, .bb_mult = 64, },
 };
 
-static struct lpphy_tx_gain_table_entry lpphy_rev2_2ghz_tx_gain_table[] = {
+static const struct lpphy_tx_gain_table_entry lpphy_rev2_2ghz_tx_gain_table[] = {
 	{ .gm = 7, .pga = 99, .pad = 255, .dac = 0, .bb_mult = 64, },
 	{ .gm = 7, .pga = 96, .pad = 255, .dac = 0, .bb_mult = 64, },
 	{ .gm = 7, .pga = 93, .pad = 255, .dac = 0, .bb_mult = 64, },
@@ -2123,7 +2123,7 @@  static struct lpphy_tx_gain_table_entry lpphy_rev2_2ghz_tx_gain_table[] = {
 	{ .gm = 7, .pga = 13, .pad = 52, .dac = 0, .bb_mult = 64, },
 };
 
-static struct lpphy_tx_gain_table_entry lpphy_rev2_5ghz_tx_gain_table[] = {
+static const struct lpphy_tx_gain_table_entry lpphy_rev2_5ghz_tx_gain_table[] = {
 	{ .gm = 255, .pga = 255, .pad = 255, .dac = 0, .bb_mult = 152, },
 	{ .gm = 255, .pga = 255, .pad = 255, .dac = 0, .bb_mult = 147, },
 	{ .gm = 255, .pga = 255, .pad = 255, .dac = 0, .bb_mult = 143, },
@@ -2392,7 +2392,7 @@  void lpphy_write_gain_table(struct b43_wldev *dev, int offset,
 }
 
 void lpphy_write_gain_table_bulk(struct b43_wldev *dev, int offset, int count,
-				 struct lpphy_tx_gain_table_entry *table)
+				 const struct lpphy_tx_gain_table_entry *table)
 {
 	int i;
 
diff --git a/drivers/net/wireless/broadcom/b43/tables_lpphy.h b/drivers/net/wireless/broadcom/b43/tables_lpphy.h
index 62002098bbda..1971ccccabf8 100644
--- a/drivers/net/wireless/broadcom/b43/tables_lpphy.h
+++ b/drivers/net/wireless/broadcom/b43/tables_lpphy.h
@@ -36,7 +36,7 @@  struct lpphy_tx_gain_table_entry {
 void lpphy_write_gain_table(struct b43_wldev *dev, int offset,
 			    struct lpphy_tx_gain_table_entry data);
 void lpphy_write_gain_table_bulk(struct b43_wldev *dev, int offset, int count,
-				 struct lpphy_tx_gain_table_entry *table);
+				 const struct lpphy_tx_gain_table_entry *table);
 
 void lpphy_rev0_1_table_init(struct b43_wldev *dev);
 void lpphy_rev2plus_table_init(struct b43_wldev *dev);