sparc: 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> Tested-by: David S. Miller <davem@davemloft.net> Link: http://lkml.kernel.org/r/20120420124558.055198736@linutronix.de
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@ -30,6 +30,7 @@ config SPARC
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select USE_GENERIC_SMP_HELPERS if SMP
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select GENERIC_PCI_IOMAP
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select HAVE_NMI_WATCHDOG if SPARC64
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select GENERIC_SMP_IDLE_THREAD
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config SPARC32
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def_bool !64BIT
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@ -315,6 +315,7 @@ struct leon2_cacheregs {
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#include <linux/interrupt.h>
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struct device_node;
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struct task_struct;
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extern unsigned int leon_build_device_irq(unsigned int real_irq,
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irq_flow_handler_t flow_handler,
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const char *name, int do_ack);
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@ -344,7 +345,7 @@ extern int leon_smp_nrcpus(void);
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extern void leon_clear_profile_irq(int cpu);
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extern void leon_smp_done(void);
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extern void leon_boot_cpus(void);
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extern int leon_boot_one_cpu(int i);
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extern int leon_boot_one_cpu(int i, struct task_struct *);
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void leon_init_smp(void);
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extern void cpu_idle(void);
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extern void init_IRQ(void);
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@ -380,7 +381,7 @@ extern int leon_ipi_irq;
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#define init_leon() do {} while (0)
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#define leon_smp_done() do {} while (0)
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#define leon_boot_cpus() do {} while (0)
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#define leon_boot_one_cpu(i) 1
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#define leon_boot_one_cpu(i, t) 1
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#define leon_init_smp() do {} while (0)
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#endif /* !defined(CONFIG_SPARC_LEON) */
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@ -204,16 +204,11 @@ void __init leon_boot_cpus(void)
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}
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int __cpuinit leon_boot_one_cpu(int i)
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int __cpuinit leon_boot_one_cpu(int i, struct task_struct *idle)
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{
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struct task_struct *p;
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int timeout;
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/* Cook up an idler for this guy. */
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p = fork_idle(i);
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current_set[i] = task_thread_info(p);
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current_set[i] = task_thread_info(idle);
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/* See trampoline.S:leon_smp_cpu_startup for details...
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* Initialize the contexts table
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@ -413,8 +413,8 @@ void __init smp_prepare_boot_cpu(void)
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int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tidle)
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{
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extern int __cpuinit smp4m_boot_one_cpu(int);
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extern int __cpuinit smp4d_boot_one_cpu(int);
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extern int __cpuinit smp4m_boot_one_cpu(int, struct task_struct *);
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extern int __cpuinit smp4d_boot_one_cpu(int, struct task_struct *);
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int ret=0;
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switch(sparc_cpu_model) {
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@ -427,13 +427,13 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tidle)
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BUG();
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break;
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case sun4m:
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ret = smp4m_boot_one_cpu(cpu);
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ret = smp4m_boot_one_cpu(cpu, tidle);
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break;
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case sun4d:
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ret = smp4d_boot_one_cpu(cpu);
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ret = smp4d_boot_one_cpu(cpu, tidle);
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break;
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case sparc_leon:
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ret = leon_boot_one_cpu(cpu);
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ret = leon_boot_one_cpu(cpu, tidle);
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break;
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case sun4e:
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printk("SUN4E\n");
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@ -343,21 +343,17 @@ extern unsigned long sparc64_cpu_startup;
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*/
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static struct thread_info *cpu_new_thread = NULL;
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static int __cpuinit smp_boot_one_cpu(unsigned int cpu)
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static int __cpuinit smp_boot_one_cpu(unsigned int cpu, struct task_struct *idle)
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{
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unsigned long entry =
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(unsigned long)(&sparc64_cpu_startup);
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unsigned long cookie =
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(unsigned long)(&cpu_new_thread);
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struct task_struct *p;
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void *descr = NULL;
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int timeout, ret;
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p = fork_idle(cpu);
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if (IS_ERR(p))
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return PTR_ERR(p);
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callin_flag = 0;
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cpu_new_thread = task_thread_info(p);
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cpu_new_thread = task_thread_info(idle);
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if (tlb_type == hypervisor) {
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#if defined(CONFIG_SUN_LDOMS) && defined(CONFIG_HOTPLUG_CPU)
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@ -1229,7 +1225,7 @@ void __devinit smp_fill_in_sib_core_maps(void)
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int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tidle)
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{
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int ret = smp_boot_one_cpu(cpu);
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int ret = smp_boot_one_cpu(cpu, tidle);
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if (!ret) {
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cpumask_set_cpu(cpu, &smp_commenced_mask);
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@ -127,18 +127,14 @@ void __init smp4d_boot_cpus(void)
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local_flush_cache_all();
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}
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int __cpuinit smp4d_boot_one_cpu(int i)
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int __cpuinit smp4d_boot_one_cpu(int i, struct task_struct *idle)
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{
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unsigned long *entry = &sun4d_cpu_startup;
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struct task_struct *p;
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int timeout;
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int cpu_node;
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cpu_find_by_instance(i, &cpu_node, NULL);
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/* Cook up an idler for this guy. */
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p = fork_idle(i);
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current_set[i] = task_thread_info(p);
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current_set[i] = task_thread_info(idle);
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/*
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* Initialize the contexts table
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* Since the call to prom_startcpu() trashes the structure,
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@ -91,18 +91,15 @@ void __init smp4m_boot_cpus(void)
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local_flush_cache_all();
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}
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int __cpuinit smp4m_boot_one_cpu(int i)
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int __cpuinit smp4m_boot_one_cpu(int i, struct task_struct *idle)
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{
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unsigned long *entry = &sun4m_cpu_startup;
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struct task_struct *p;
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int timeout;
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int cpu_node;
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cpu_find_by_mid(i, &cpu_node);
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current_set[i] = task_thread_info(idle);
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/* Cook up an idler for this guy. */
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p = fork_idle(i);
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current_set[i] = task_thread_info(p);
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/* See trampoline.S for details... */
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entry += ((i - 1) * 3);
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