Commit e2bf384d authored by Jisheng Zhang's avatar Jisheng Zhang Committed by Daniel Lezcano
Browse files

clocksource/drivers/arm_arch_timer: Add __ro_after_init and __init 



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: default avatarJisheng Zhang <Jisheng.Zhang@synaptics.com>
Acked-by: default avatarMarc Zyngier <maz@kernel.org>
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210330140444.4fb2a7cb@xhacker.debian
parent 25de4ce5

drivers/clocksource/arm_arch_timer.c

+12 −11
Original line number Diff line number Diff line
@@ -51,7 +51,7 @@ 


static unsigned arch_timers_present __initdata;



static void __iomem *arch_counter_base;

static void __iomem *arch_counter_base __ro_after_init;



struct arch_timer {

	void __iomem *base;
@@ -60,15 +60,16 @@ struct arch_timer { 


#define to_arch_timer(e) container_of(e, struct arch_timer, evt)



static u32 arch_timer_rate;

static int arch_timer_ppi[ARCH_TIMER_MAX_TIMER_PPI];

static u32 arch_timer_rate __ro_after_init;

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 enum arch_timer_ppi_nr arch_timer_uses_ppi = ARCH_TIMER_VIRT_PPI;

static bool arch_timer_c3stop;

static bool arch_timer_mem_use_virtual;

static bool arch_counter_suspend_stop;

static enum arch_timer_ppi_nr arch_timer_uses_ppi __ro_after_init = ARCH_TIMER_VIRT_PPI;

static bool arch_timer_c3stop __ro_after_init;

static bool arch_timer_mem_use_virtual __ro_after_init;

static bool arch_counter_suspend_stop __ro_after_init;

#ifdef CONFIG_GENERIC_GETTIMEOFDAY

static enum vdso_clock_mode vdso_default = VDSO_CLOCKMODE_ARCHTIMER;

#else
@@ -76,7 +77,7 @@ static enum vdso_clock_mode vdso_default = VDSO_CLOCKMODE_NONE; 
#endif /* CONFIG_GENERIC_GETTIMEOFDAY */



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)

{
@@ -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

 * 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);



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

 * 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? */

	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");

}



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",

		type & ARCH_TIMER_TYPE_CP15 ? "cp15" : "",