arm: Use generic idle thread allocation
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Tested-by: Frank Rowand <frank.rowand@am.sony.com>
Link: http://lkml.kernel.org/r/20120420124557.448826362@linutronix.de
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cf006d4..cb253ce 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -34,6 +34,7 @@
select CPU_PM if (SUSPEND || CPU_IDLE)
select GENERIC_PCI_IOMAP
select HAVE_BPF_JIT if NET
+ select GENERIC_SMP_IDLE_THREAD
help
The ARM series is a line of low-power-consumption RISC chip designs
licensed by ARM Ltd and targeted at embedded applications and
diff --git a/arch/arm/include/asm/cpu.h b/arch/arm/include/asm/cpu.h
index 7939681..d797223 100644
--- a/arch/arm/include/asm/cpu.h
+++ b/arch/arm/include/asm/cpu.h
@@ -16,7 +16,6 @@
struct cpuinfo_arm {
struct cpu cpu;
#ifdef CONFIG_SMP
- struct task_struct *idle;
unsigned int loops_per_jiffy;
#endif
};
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index f0e2cbb..5e86f7c 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -60,32 +60,11 @@
static DECLARE_COMPLETION(cpu_running);
-int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tidle)
+int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
{
- struct cpuinfo_arm *ci = &per_cpu(cpu_data, cpu);
- struct task_struct *idle = ci->idle;
int ret;
/*
- * Spawn a new process manually, if not already done.
- * Grab a pointer to its task struct so we can mess with it
- */
- if (!idle) {
- idle = fork_idle(cpu);
- if (IS_ERR(idle)) {
- printk(KERN_ERR "CPU%u: fork() failed\n", cpu);
- return PTR_ERR(idle);
- }
- ci->idle = idle;
- } else {
- /*
- * Since this idle thread is being re-used, call
- * init_idle() to reinitialize the thread structure.
- */
- init_idle(idle, cpu);
- }
-
- /*
* We need to tell the secondary core where to find
* its stack and the page tables.
*/
@@ -318,9 +297,6 @@
void __init smp_prepare_boot_cpu(void)
{
- unsigned int cpu = smp_processor_id();
-
- per_cpu(cpu_data, cpu).idle = current;
}
void __init smp_prepare_cpus(unsigned int max_cpus)