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Message-ID: <626783bb264a8b3b0c8cd7e1d9f9b241f0a494b6.1719652155.git.christophe.jaillet@wanadoo.fr>
Date: Sat, 29 Jun 2024 11:19:31 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: matthias.bgg@...il.com,
angelogioacchino.delregno@...labora.com,
fparent@...libre.com,
fchiby@...libre.com,
s.hauer@...gutronix.de
Cc: linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org,
linux-kernel@...r.kernel.org,
kernel-janitors@...r.kernel.org,
Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 2/4] soc: mediatek: pwrap: Constify some struct int[]
These arrays 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, as an example:
Before:
======
text data bss dec hex filename
45528 8532 16 54076 d33c drivers/soc/mediatek/mtk-pmic-wrap.o
After:
=====
text data bss dec hex filename
52664 1384 16 54064 d330 drivers/soc/mediatek/mtk-pmic-wrap.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Compile tested-only
---
drivers/soc/mediatek/mtk-pmic-wrap.c | 30 ++++++++++++++--------------
1 file changed, 15 insertions(+), 15 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
index 0da0cdec5050..d57553486383 100644
--- a/drivers/soc/mediatek/mtk-pmic-wrap.c
+++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
@@ -483,7 +483,7 @@ enum pwrap_regs {
PWRAP_MSB_FIRST,
};
-static int mt2701_regs[] = {
+static const int mt2701_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
@@ -569,7 +569,7 @@ static int mt2701_regs[] = {
[PWRAP_ADC_RDATA_ADDR2] = 0x154,
};
-static int mt6765_regs[] = {
+static const int mt6765_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
@@ -601,7 +601,7 @@ static int mt6765_regs[] = {
[PWRAP_DCM_DBC_PRD] = 0x1E0,
};
-static int mt6779_regs[] = {
+static const int mt6779_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
@@ -640,7 +640,7 @@ static int mt6779_regs[] = {
[PWRAP_WACS2_VLDCLR] = 0xC28,
};
-static int mt6795_regs[] = {
+static const int mt6795_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
@@ -725,7 +725,7 @@ static int mt6795_regs[] = {
[PWRAP_EXT_CK] = 0x14c,
};
-static int mt6797_regs[] = {
+static const int mt6797_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
@@ -758,7 +758,7 @@ static int mt6797_regs[] = {
[PWRAP_DCM_DBC_PRD] = 0x1D4,
};
-static int mt6873_regs[] = {
+static const int mt6873_regs[] = {
[PWRAP_INIT_DONE2] = 0x0,
[PWRAP_TIMER_EN] = 0x3E0,
[PWRAP_INT_EN] = 0x448,
@@ -769,7 +769,7 @@ static int mt6873_regs[] = {
[PWRAP_WACS2_RDATA] = 0xCA8,
};
-static int mt7622_regs[] = {
+static const int mt7622_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
@@ -881,7 +881,7 @@ static int mt7622_regs[] = {
[PWRAP_SPI2_CTRL] = 0x244,
};
-static int mt8135_regs[] = {
+static const int mt8135_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
@@ -954,7 +954,7 @@ static int mt8135_regs[] = {
[PWRAP_DCM_DBC_PRD] = 0x160,
};
-static int mt8173_regs[] = {
+static const int mt8173_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
@@ -1036,7 +1036,7 @@ static int mt8173_regs[] = {
[PWRAP_DCM_DBC_PRD] = 0x148,
};
-static int mt8183_regs[] = {
+static const int mt8183_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
@@ -1087,7 +1087,7 @@ static int mt8183_regs[] = {
[PWRAP_WACS2_VLDCLR] = 0xC28,
};
-static int mt8195_regs[] = {
+static const int mt8195_regs[] = {
[PWRAP_INIT_DONE2] = 0x0,
[PWRAP_STAUPD_CTRL] = 0x4C,
[PWRAP_TIMER_EN] = 0x3E4,
@@ -1104,7 +1104,7 @@ static int mt8195_regs[] = {
[PWRAP_WACS2_RDATA] = 0x8A8,
};
-static int mt8365_regs[] = {
+static const int mt8365_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
@@ -1166,7 +1166,7 @@ static int mt8365_regs[] = {
[PWRAP_WDT_SRC_EN_1] = 0xf8,
};
-static int mt8516_regs[] = {
+static const int mt8516_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
@@ -1251,7 +1251,7 @@ static int mt8516_regs[] = {
[PWRAP_MSB_FIRST] = 0x170,
};
-static int mt8186_regs[] = {
+static const int mt8186_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
@@ -1377,7 +1377,7 @@ struct pmic_wrapper {
};
struct pmic_wrapper_type {
- int *regs;
+ const int *regs;
enum pwrap_type type;
u32 arb_en_all;
u32 int_en_all;
--
2.45.2
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