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clocksource/drivers/arm_arch_timer: Add __ro_after_init and __init

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Some functions are not needed after booting, so mark them as __init
to move them to the .init section.

Some global variables are never modified after init, so can be
__ro_after_init.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210330140444.4fb2a7cb@xhacker.debian
This commit is contained in:
Jisheng Zhang 2021-03-30 14:04:44 +08:00 • committed by Daniel Lezcano
parent 25de4ce5ed
commit e2bf384d43
1 changed files with 12 additions and 11 deletions
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23
drivers/clocksource/arm_arch_timer.c
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@ -51,7 +51,7 @@
static unsigned arch_timers_present __initdata; static unsigned arch_timers_present __initdata;
static void __iomem *arch_counter_base; static void __iomem *arch_counter_base __ro_after_init;
struct arch_timer { struct arch_timer {
void __iomem *base; void __iomem *base;
@ -60,15 +60,16 @@ struct arch_timer {
#define to_arch_timer(e) container_of(e, struct arch_timer, evt) #define to_arch_timer(e) container_of(e, struct arch_timer, evt)
static u32 arch_timer_rate; static u32 arch_timer_rate __ro_after_init;
static int arch_timer_ppi[ARCH_TIMER_MAX_TIMER_PPI]; u32 arch_timer_rate1 __ro_after_init;
static int arch_timer_ppi[ARCH_TIMER_MAX_TIMER_PPI] __ro_after_init;
static struct clock_event_device __percpu *arch_timer_evt; static struct clock_event_device __percpu *arch_timer_evt;
static enum arch_timer_ppi_nr arch_timer_uses_ppi = ARCH_TIMER_VIRT_PPI; static enum arch_timer_ppi_nr arch_timer_uses_ppi __ro_after_init = ARCH_TIMER_VIRT_PPI;
static bool arch_timer_c3stop; static bool arch_timer_c3stop __ro_after_init;
static bool arch_timer_mem_use_virtual; static bool arch_timer_mem_use_virtual __ro_after_init;
static bool arch_counter_suspend_stop; static bool arch_counter_suspend_stop __ro_after_init;
#ifdef CONFIG_GENERIC_GETTIMEOFDAY #ifdef CONFIG_GENERIC_GETTIMEOFDAY
static enum vdso_clock_mode vdso_default = VDSO_CLOCKMODE_ARCHTIMER; static enum vdso_clock_mode vdso_default = VDSO_CLOCKMODE_ARCHTIMER;
#else #else
@ -76,7 +77,7 @@ static enum vdso_clock_mode vdso_default = VDSO_CLOCKMODE_NONE;
#endif /* CONFIG_GENERIC_GETTIMEOFDAY */ #endif /* CONFIG_GENERIC_GETTIMEOFDAY */
static cpumask_t evtstrm_available = CPU_MASK_NONE; static cpumask_t evtstrm_available = CPU_MASK_NONE;
static bool evtstrm_enable = IS_ENABLED(CONFIG_ARM_ARCH_TIMER_EVTSTREAM); static bool evtstrm_enable __ro_after_init = IS_ENABLED(CONFIG_ARM_ARCH_TIMER_EVTSTREAM);
static int __init early_evtstrm_cfg(char *buf) static int __init early_evtstrm_cfg(char *buf)
{ {
@ -176,7 +177,7 @@ static notrace u64 arch_counter_get_cntvct(void)
* to exist on arm64. arm doesn't use this before DT is probed so even * to exist on arm64. arm doesn't use this before DT is probed so even
* if we don't have the cp15 accessors we won't have a problem. * if we don't have the cp15 accessors we won't have a problem.
*/ */
u64 (*arch_timer_read_counter)(void) = arch_counter_get_cntvct; u64 (*arch_timer_read_counter)(void) __ro_after_init = arch_counter_get_cntvct;
EXPORT_SYMBOL_GPL(arch_timer_read_counter); EXPORT_SYMBOL_GPL(arch_timer_read_counter);
static u64 arch_counter_read(struct clocksource *cs) static u64 arch_counter_read(struct clocksource *cs)
@ -925,7 +926,7 @@ static int validate_timer_rate(void)
* rate was probed first, and don't verify that others match. If the first node * rate was probed first, and don't verify that others match. If the first node
* probed has a clock-frequency property, this overrides the HW register. * probed has a clock-frequency property, this overrides the HW register.
*/ */
static void arch_timer_of_configure_rate(u32 rate, struct device_node *np) static void __init arch_timer_of_configure_rate(u32 rate, struct device_node *np)
{ {
/* Who has more than one independent system counter? */ /* Who has more than one independent system counter? */
if (arch_timer_rate) if (arch_timer_rate)
@ -939,7 +940,7 @@ static void arch_timer_of_configure_rate(u32 rate, struct device_node *np)
pr_warn("frequency not available\n"); pr_warn("frequency not available\n");
} }
static void arch_timer_banner(unsigned type) static void __init arch_timer_banner(unsigned type)
{ {
pr_info("%s%s%s timer(s) running at %lu.%02luMHz (%s%s%s).\n", pr_info("%s%s%s timer(s) running at %lu.%02luMHz (%s%s%s).\n",
type & ARCH_TIMER_TYPE_CP15 ? "cp15" : "", type & ARCH_TIMER_TYPE_CP15 ? "cp15" : "",