From 211baa7016894c02fc18693e21ca479cd08ac0c0 Mon Sep 17 00:00:00 2001 From: Russell King Date: Tue, 11 Jan 2011 16:23:04 +0000 Subject: [PATCH] ARM: sched_clock: allow init_sched_clock() to be called early sched_clock is supposed to be initialized early - in the recently added init_early platform hook. However, in doing so we end up calling mod_timer() before the timer lists are initialized, resulting in an oops. Split the initialization in two - the part which the platform calls early which starts things off. The addition of the timer can be delayed until after we have more of the kernel initialized - when the normal time sources are initialized. Signed-off-by: Russell King --- arch/arm/include/asm/sched_clock.h | 2 ++ arch/arm/kernel/sched_clock.c | 7 ++++++- arch/arm/kernel/time.c | 4 ++++ 3 files changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/arm/include/asm/sched_clock.h b/arch/arm/include/asm/sched_clock.h index a84628b..c8e6ddf 100644 --- a/arch/arm/include/asm/sched_clock.h +++ b/arch/arm/include/asm/sched_clock.h @@ -115,4 +115,6 @@ static inline void init_fixed_sched_clock(struct clock_data *cd, } } +extern void sched_clock_postinit(void); + #endif diff --git a/arch/arm/kernel/sched_clock.c b/arch/arm/kernel/sched_clock.c index 2cdcc92..784464a 100644 --- a/arch/arm/kernel/sched_clock.c +++ b/arch/arm/kernel/sched_clock.c @@ -60,10 +60,15 @@ void __init init_sched_clock(struct clock_data *cd, void (*update)(void), * sets the initial epoch. */ sched_clock_timer.data = msecs_to_jiffies(w - (w / 10)); - sched_clock_poll(sched_clock_timer.data); + update(); /* * Ensure that sched_clock() starts off at 0ns */ cd->epoch_ns = 0; } + +void __init sched_clock_postinit(void) +{ + sched_clock_poll(sched_clock_timer.data); +} diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c index f1e2eb1..3d76bf2 100644 --- a/arch/arm/kernel/time.c +++ b/arch/arm/kernel/time.c @@ -29,6 +29,7 @@ #include #include +#include #include #include #include @@ -163,5 +164,8 @@ void __init time_init(void) { system_timer = machine_desc->timer; system_timer->init(); +#ifdef CONFIG_HAVE_SCHED_CLOCK + sched_clock_postinit(); +#endif } -- 2.7.4