clocksource/drivers/imx-sysctr: Mark two variable with __ro_after_init

MrVan · dlezcano · commit f5bd5fc9d478 · 2021-12-09T14:13:04.000+01:00
The variables 'sys_ctr_base' and 'cmpcr' are not be updated after init, so mark them as __ro_after_init. Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20211201125030.2307746-1-peng.fan@oss.nxp.com Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/drivers/clocksource/timer-imx-sysctr.c b/drivers/clocksource/timer-imx-sysctr.c
@@ -20,8 +20,8 @@
 
 #define SYS_CTR_CLK_DIV		0x3
 
-static void __iomem *sys_ctr_base;
-static u32 cmpcr;
+static void __iomem *sys_ctr_base __ro_after_init;
+static u32 cmpcr __ro_after_init;
 
 static void sysctr_timer_enable(bool enable)
 {

Original file line number	Diff line number	Diff line change
`@@ -20,8 +20,8 @@`
`20`	`20`
`21`	`21`	`#define SYS_CTR_CLK_DIV 0x3`
`22`	`22`
`23`		`-static void __iomem *sys_ctr_base;`
`24`		`-static u32 cmpcr;`
	`23`	`+static void __iomem *sys_ctr_base __ro_after_init;`
	`24`	`+static u32 cmpcr __ro_after_init;`
`25`	`25`
`26`	`26`	`static void sysctr_timer_enable(bool enable)`
`27`	`27`	`{`