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authorLinus Torvalds <torvalds@linux-foundation.org>2008-02-04 15:29:53 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-02-04 15:29:53 -0800
commit9ef9dc69d4167276c04590d67ee55de8380bc1ad (patch)
treef0afd03cd9184eda2fe14c41f09daec79a62682e /arch/arm/kernel/smp.c
parent2c8296f8cf0ec40867965dddef3dfe92f73b38f4 (diff)
parent0d899e1b0000ddf78a75d7dcf9a9029d6f7f8091 (diff)
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (44 commits) [ARM] 4822/1: RealView: Change the REALVIEW_MPCORE configuration option [ARM] 4821/1: RealView: Remove the platform dependencies from localtimer.c [ARM] 4820/1: RealView: Select the timer IRQ at run-time [ARM] 4819/1: RealView: Fix entry-macro.S to work with multiple platforms [ARM] 4818/1: RealView: Add core-tile detection [ARM] 4817/1: RealView: Move the AMBA resource definitions to realview_eb.c [ARM] 4816/1: RealView: Move the platform-specific definitions into board-eb.h [ARM] 4815/1: RealView: Add clockevents suport for the local timers [ARM] 4814/1: RealView: Add broadcasting clockevents support for ARM11MPCore [ARM] 4813/1: Add SMP helper functions for clockevents support [ARM] 4812/1: RealView: clockevents support for the RealView platforms [ARM] 4811/1: RealView: clocksource support for the RealView platforms [ARM] 4736/1: Export atags to userspace and allow kexec to use customised atags [ARM] 4798/1: pcm027: fix missing header file [ARM] 4803/1: pxa: fix building issue of poodle.c caused by patch 4737/1 [ARM] 4801/1: pxa: fix building issues of missing pxa2xx-regs.h [ARM] pxa: introduce sysdev for pxa3xx static memory controller [ARM] pxa: add preliminary suspend/resume code for pxa3xx [ARM] pxa: introduce sysdev for GPIO register saving/restoring [ARM] pxa: introduce sysdev for IRQ register saving/restoring ...
Diffstat (limited to 'arch/arm/kernel/smp.c')
-rw-r--r--arch/arm/kernel/smp.c39
1 files changed, 32 insertions, 7 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index eafbb2b05eb..e9dfbab46cb 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -290,6 +290,11 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
local_irq_enable();
local_fiq_enable();
+ /*
+ * Setup local timer for this CPU.
+ */
+ local_timer_setup(cpu);
+
calibrate_delay();
smp_store_cpu_info(cpu);
@@ -300,11 +305,6 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
cpu_set(cpu, cpu_online_map);
/*
- * Setup local timer for this CPU.
- */
- local_timer_setup(cpu);
-
- /*
* OK, it's off to the idle thread for us
*/
cpu_idle();
@@ -454,6 +454,27 @@ int smp_call_function(void (*func)(void *info), void *info, int retry,
}
EXPORT_SYMBOL_GPL(smp_call_function);
+int smp_call_function_single(int cpu, void (*func)(void *info), void *info,
+ int retry, int wait)
+{
+ /* prevent preemption and reschedule on another processor */
+ int current_cpu = get_cpu();
+ int ret = 0;
+
+ if (cpu == current_cpu) {
+ local_irq_disable();
+ func(info);
+ local_irq_enable();
+ } else
+ ret = smp_call_function_on_cpu(func, info, retry, wait,
+ cpumask_of_cpu(cpu));
+
+ put_cpu();
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(smp_call_function_single);
+
void show_ipi_list(struct seq_file *p)
{
unsigned int cpu;
@@ -481,8 +502,7 @@ void show_local_irqs(struct seq_file *p)
static void ipi_timer(void)
{
irq_enter();
- profile_tick(CPU_PROFILING);
- update_process_times(user_mode(get_irq_regs()));
+ local_timer_interrupt();
irq_exit();
}
@@ -621,6 +641,11 @@ void smp_send_timer(void)
send_ipi_message(mask, IPI_TIMER);
}
+void smp_timer_broadcast(cpumask_t mask)
+{
+ send_ipi_message(mask, IPI_TIMER);
+}
+
void smp_send_stop(void)
{
cpumask_t mask = cpu_online_map;