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can: m_can: Constify struct m_can_ops

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'struct m_can_ops' is not modified in these drivers.

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
   4806	    520	      0	   5326	   14ce	drivers/net/can/m_can/m_can_pci.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
   4862	    464	      0	   5326	   14ce	drivers/net/can/m_can/m_can_pci.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/all/a17b96d1be5341c11f263e1e45c9de1cb754e416.1719172843.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Christophe JAILLET 2024-06-23 22:01:50 +02:00 committed by Marc Kleine-Budde
parent 580d1712a4
commit 62d73261a0
4 changed files with 4 additions and 4 deletions
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2
drivers/net/can/m_can/m_can.h
View File

@ -91,7 +91,7 @@ struct m_can_classdev {
ktime_t irq_timer_wait;
struct m_can_ops *ops;
const struct m_can_ops *ops;
int version;
u32 irqstatus;

2
drivers/net/can/m_can/m_can_pci.c
View File

@ -77,7 +77,7 @@ static int iomap_write_fifo(struct m_can_classdev *cdev, int offset,
return 0;
}
static struct m_can_ops m_can_pci_ops = {
static const struct m_can_ops m_can_pci_ops = {
.read_reg = iomap_read_reg,
.write_reg = iomap_write_reg,
.write_fifo = iomap_write_fifo,

2
drivers/net/can/m_can/m_can_platform.c
View File

@ -68,7 +68,7 @@ static int iomap_write_fifo(struct m_can_classdev *cdev, int offset,
return 0;
}
static struct m_can_ops m_can_plat_ops = {
static const struct m_can_ops m_can_plat_ops = {
.read_reg = iomap_read_reg,
.write_reg = iomap_write_reg,
.write_fifo = iomap_write_fifo,

2
drivers/net/can/m_can/tcan4x5x-core.c
View File

@ -357,7 +357,7 @@ static int tcan4x5x_get_gpios(struct m_can_classdev *cdev,
return 0;
}
static struct m_can_ops tcan4x5x_ops = {
static const struct m_can_ops tcan4x5x_ops = {
.init = tcan4x5x_init,
.read_reg = tcan4x5x_read_reg,
.write_reg = tcan4x5x_write_reg,