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Message-ID: <00e8dec399bd188a241eff694b334e27da096aed.1723022467.git.christophe.jaillet@wanadoo.fr>
Date: Wed, 7 Aug 2024 11:30:57 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: linus.walleij@...aro.org,
neil.armstrong@...aro.org,
khilman@...libre.com,
jbrunet@...libre.com,
martin.blumenstingl@...glemail.com
Cc: linux-gpio@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-amlogic@...ts.infradead.org,
linux-kernel@...r.kernel.org,
kernel-janitors@...r.kernel.org,
Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 3/3] pinctrl: meson: Constify struct meson_pmx_bank
'struct meson_pmx_bank' are not modified in these drivers.
Constifying these structures 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
21922 568 0 22490 57da drivers/pinctrl/meson/pinctrl-amlogic-c3.o
34222 688 0 34910 885e drivers/pinctrl/meson/pinctrl-amlogic-t7.o
24945 440 0 25385 6329 drivers/pinctrl/meson/pinctrl-meson8b.o
29412 440 0 29852 749c drivers/pinctrl/meson/pinctrl-meson8.o
3070 324 0 3394 d42 drivers/pinctrl/meson/pinctrl-meson8-pmx.o
18469 520 0 18989 4a2d drivers/pinctrl/meson/pinctrl-meson-a1.o
23155 648 0 23803 5cfb drivers/pinctrl/meson/pinctrl-meson-axg.o
2470 120 0 2590 a1e drivers/pinctrl/meson/pinctrl-meson-axg-pmx.o
29653 712 0 30365 769d drivers/pinctrl/meson/pinctrl-meson-g12a.o
23496 456 0 23952 5d90 drivers/pinctrl/meson/pinctrl-meson-gxbb.o
22224 456 0 22680 5898 drivers/pinctrl/meson/pinctrl-meson-gxl.o
20507 1132 48 21687 54b7 drivers/pinctrl/meson/pinctrl-meson.o
24500 592 0 25092 6204 drivers/pinctrl/meson/pinctrl-meson-s4.o
After:
=====
text data bss dec hex filename
22114 384 0 22498 57e2 drivers/pinctrl/meson/pinctrl-amlogic-c3.o
34510 384 0 34894 884e drivers/pinctrl/meson/pinctrl-amlogic-t7.o
24945 440 0 25385 6329 drivers/pinctrl/meson/pinctrl-meson8b.o
29412 440 0 29852 749c drivers/pinctrl/meson/pinctrl-meson8.o
3070 324 0 3394 d42 drivers/pinctrl/meson/pinctrl-meson8-pmx.o
18597 384 0 18981 4a25 drivers/pinctrl/meson/pinctrl-meson-a1.o
23315 496 0 23811 5d03 drivers/pinctrl/meson/pinctrl-meson-axg.o
2470 120 0 2590 a1e drivers/pinctrl/meson/pinctrl-meson-axg-pmx.o
29877 504 0 30381 76ad drivers/pinctrl/meson/pinctrl-meson-g12a.o
23496 456 0 23952 5d90 drivers/pinctrl/meson/pinctrl-meson-gxbb.o
22224 456 0 22680 5898 drivers/pinctrl/meson/pinctrl-meson-gxl.o
20507 1132 48 21687 54b7 drivers/pinctrl/meson/pinctrl-meson.o
24692 384 0 25076 61f4 drivers/pinctrl/meson/pinctrl-meson-s4.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Compile tested-only.
---
drivers/pinctrl/meson/pinctrl-amlogic-c3.c | 2 +-
drivers/pinctrl/meson/pinctrl-amlogic-t7.c | 2 +-
drivers/pinctrl/meson/pinctrl-meson-a1.c | 2 +-
drivers/pinctrl/meson/pinctrl-meson-axg-pmx.c | 8 ++++----
drivers/pinctrl/meson/pinctrl-meson-axg-pmx.h | 2 +-
drivers/pinctrl/meson/pinctrl-meson-axg.c | 4 ++--
drivers/pinctrl/meson/pinctrl-meson-g12a.c | 4 ++--
drivers/pinctrl/meson/pinctrl-meson-s4.c | 2 +-
8 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/drivers/pinctrl/meson/pinctrl-amlogic-c3.c b/drivers/pinctrl/meson/pinctrl-amlogic-c3.c
index aeaa810e855b..b94c494249e9 100644
--- a/drivers/pinctrl/meson/pinctrl-amlogic-c3.c
+++ b/drivers/pinctrl/meson/pinctrl-amlogic-c3.c
@@ -1054,7 +1054,7 @@ static const struct meson_bank c3_periphs_banks[] = {
0x73, 0, 0x74, 0, 0x72, 0, 0x71, 0, 0x70, 0, 0x77, 0),
};
-static struct meson_pmx_bank c3_periphs_pmx_banks[] = {
+static const struct meson_pmx_bank c3_periphs_pmx_banks[] = {
/* name first last reg offset */
BANK_PMX("B", GPIOB_0, GPIOB_14, 0x00, 0),
BANK_PMX("X", GPIOX_0, GPIOX_13, 0x03, 0),
diff --git a/drivers/pinctrl/meson/pinctrl-amlogic-t7.c b/drivers/pinctrl/meson/pinctrl-amlogic-t7.c
index f880b36c3b54..51128ade05c6 100644
--- a/drivers/pinctrl/meson/pinctrl-amlogic-t7.c
+++ b/drivers/pinctrl/meson/pinctrl-amlogic-t7.c
@@ -1552,7 +1552,7 @@ static const struct meson_bank t7_periphs_banks[] = {
0x83, 0, 0x84, 0, 0x82, 0, 0x81, 0, 0x80, 0, 0x87, 0),
};
-static struct meson_pmx_bank t7_periphs_pmx_banks[] = {
+static const struct meson_pmx_bank t7_periphs_pmx_banks[] = {
/* name first last reg offset */
BANK_PMX("D", GPIOD_0, GPIOD_12, 0x0a, 0),
BANK_PMX("E", GPIOE_0, GPIOE_6, 0x0c, 0),
diff --git a/drivers/pinctrl/meson/pinctrl-meson-a1.c b/drivers/pinctrl/meson/pinctrl-meson-a1.c
index e0589ce8dd2e..ff42301e4c0c 100644
--- a/drivers/pinctrl/meson/pinctrl-meson-a1.c
+++ b/drivers/pinctrl/meson/pinctrl-meson-a1.c
@@ -889,7 +889,7 @@ static const struct meson_bank meson_a1_periphs_banks[] = {
0x42, 0, 0x41, 0, 0x40, 0, 0x45, 0),
};
-static struct meson_pmx_bank meson_a1_periphs_pmx_banks[] = {
+static const struct meson_pmx_bank meson_a1_periphs_pmx_banks[] = {
/* name first lask reg offset */
BANK_PMX("P", GPIOP_0, GPIOP_12, 0x0, 0),
BANK_PMX("B", GPIOB_0, GPIOB_6, 0x2, 0),
diff --git a/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.c b/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.c
index 2ae802ee8241..00c3829216d6 100644
--- a/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.c
+++ b/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.c
@@ -27,10 +27,10 @@
static int meson_axg_pmx_get_bank(struct meson_pinctrl *pc,
unsigned int pin,
- struct meson_pmx_bank **bank)
+ const struct meson_pmx_bank **bank)
{
int i;
- struct meson_axg_pmx_data *pmx = pc->data->pmx_data;
+ const struct meson_axg_pmx_data *pmx = pc->data->pmx_data;
for (i = 0; i < pmx->num_pmx_banks; i++)
if (pin >= pmx->pmx_banks[i].first &&
@@ -42,7 +42,7 @@ static int meson_axg_pmx_get_bank(struct meson_pinctrl *pc,
return -EINVAL;
}
-static int meson_pmx_calc_reg_and_offset(struct meson_pmx_bank *bank,
+static int meson_pmx_calc_reg_and_offset(const struct meson_pmx_bank *bank,
unsigned int pin, unsigned int *reg,
unsigned int *offset)
{
@@ -59,10 +59,10 @@ static int meson_pmx_calc_reg_and_offset(struct meson_pmx_bank *bank,
static int meson_axg_pmx_update_function(struct meson_pinctrl *pc,
unsigned int pin, unsigned int func)
{
+ const struct meson_pmx_bank *bank;
int ret;
int reg;
int offset;
- struct meson_pmx_bank *bank;
ret = meson_axg_pmx_get_bank(pc, pin, &bank);
if (ret)
diff --git a/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.h b/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.h
index 67147ebaef1b..63b9d471e980 100644
--- a/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.h
+++ b/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.h
@@ -17,7 +17,7 @@ struct meson_pmx_bank {
};
struct meson_axg_pmx_data {
- struct meson_pmx_bank *pmx_banks;
+ const struct meson_pmx_bank *pmx_banks;
unsigned int num_pmx_banks;
};
diff --git a/drivers/pinctrl/meson/pinctrl-meson-axg.c b/drivers/pinctrl/meson/pinctrl-meson-axg.c
index 9968bd68f129..3b27dec7d858 100644
--- a/drivers/pinctrl/meson/pinctrl-meson-axg.c
+++ b/drivers/pinctrl/meson/pinctrl-meson-axg.c
@@ -1017,7 +1017,7 @@ static const struct meson_bank meson_axg_aobus_banks[] = {
BANK("AO", GPIOAO_0, GPIOAO_13, 0, 13, 0, 16, 0, 0, 0, 0, 0, 16, 1, 0),
};
-static struct meson_pmx_bank meson_axg_periphs_pmx_banks[] = {
+static const struct meson_pmx_bank meson_axg_periphs_pmx_banks[] = {
/* name first lask reg offset */
BANK_PMX("Z", GPIOZ_0, GPIOZ_10, 0x2, 0),
BANK_PMX("BOOT", BOOT_0, BOOT_14, 0x0, 0),
@@ -1031,7 +1031,7 @@ static struct meson_axg_pmx_data meson_axg_periphs_pmx_banks_data = {
.num_pmx_banks = ARRAY_SIZE(meson_axg_periphs_pmx_banks),
};
-static struct meson_pmx_bank meson_axg_aobus_pmx_banks[] = {
+static const struct meson_pmx_bank meson_axg_aobus_pmx_banks[] = {
BANK_PMX("AO", GPIOAO_0, GPIOAO_13, 0x0, 0),
};
diff --git a/drivers/pinctrl/meson/pinctrl-meson-g12a.c b/drivers/pinctrl/meson/pinctrl-meson-g12a.c
index 0d901b2d1193..272f713f8787 100644
--- a/drivers/pinctrl/meson/pinctrl-meson-g12a.c
+++ b/drivers/pinctrl/meson/pinctrl-meson-g12a.c
@@ -1342,7 +1342,7 @@ static const struct meson_bank meson_g12a_aobus_banks[] = {
3, 16, 2, 16, 0, 16, 4, 16, 1, 16, 1, 0),
};
-static struct meson_pmx_bank meson_g12a_periphs_pmx_banks[] = {
+static const struct meson_pmx_bank meson_g12a_periphs_pmx_banks[] = {
/* name first last reg offset */
BANK_PMX("Z", GPIOZ_0, GPIOZ_15, 0x6, 0),
BANK_PMX("H", GPIOH_0, GPIOH_8, 0xb, 0),
@@ -1357,7 +1357,7 @@ static struct meson_axg_pmx_data meson_g12a_periphs_pmx_banks_data = {
.num_pmx_banks = ARRAY_SIZE(meson_g12a_periphs_pmx_banks),
};
-static struct meson_pmx_bank meson_g12a_aobus_pmx_banks[] = {
+static const struct meson_pmx_bank meson_g12a_aobus_pmx_banks[] = {
BANK_PMX("AO", GPIOAO_0, GPIOAO_11, 0x0, 0),
BANK_PMX("E", GPIOE_0, GPIOE_2, 0x1, 16),
};
diff --git a/drivers/pinctrl/meson/pinctrl-meson-s4.c b/drivers/pinctrl/meson/pinctrl-meson-s4.c
index 6641bef76e58..61d459c46c13 100644
--- a/drivers/pinctrl/meson/pinctrl-meson-s4.c
+++ b/drivers/pinctrl/meson/pinctrl-meson-s4.c
@@ -1180,7 +1180,7 @@ static const struct meson_bank meson_s4_periphs_banks[] = {
0x83, 0, 0x84, 0, 0x82, 0, 0x81, 0, 0x80, 0, 0x87, 0),
};
-static struct meson_pmx_bank meson_s4_periphs_pmx_banks[] = {
+static const struct meson_pmx_bank meson_s4_periphs_pmx_banks[] = {
/*name first lask reg offset*/
BANK_PMX("B", GPIOB_0, GPIOB_13, 0x00, 0),
BANK_PMX("C", GPIOC_0, GPIOC_7, 0x9, 0),
--
2.45.2
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