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author | Thomas Gleixner <tglx@linutronix.de> | 2012-04-20 13:05:49 +0000 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2012-04-26 12:06:10 +0200 |
commit | 13583bf15eb1e890e03d46b6f2753e4b64af21c9 (patch) | |
tree | ff1121595142dbde3cb516661695859ba349f86c /arch/ia64/kernel/smpboot.c | |
parent | 17e32eacc3543c25a4377bb7ce54026e38db7d20 (diff) | |
download | linux-13583bf15eb1e890e03d46b6f2753e4b64af21c9.tar.gz linux-13583bf15eb1e890e03d46b6f2753e4b64af21c9.tar.bz2 linux-13583bf15eb1e890e03d46b6f2753e4b64af21c9.zip |
ia64: 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: Tony Luck <tony.luck@intel.com>
Link: http://lkml.kernel.org/r/20120420124557.380965133@linutronix.de
Diffstat (limited to 'arch/ia64/kernel/smpboot.c')
-rw-r--r-- | arch/ia64/kernel/smpboot.c | 61 |
1 files changed, 3 insertions, 58 deletions
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c index 03e4ef3893c9..1113b8aba07f 100644 --- a/arch/ia64/kernel/smpboot.c +++ b/arch/ia64/kernel/smpboot.c @@ -75,13 +75,6 @@ #endif /* - * Store all idle threads, this can be reused instead of creating - * a new thread. Also avoids complicated thread destroy functionality - * for idle threads. - */ -struct task_struct *idle_thread_array[NR_CPUS]; - -/* * Global array allocated for NR_CPUS at boot time */ struct sal_to_os_boot sal_boot_rendez_state[NR_CPUS]; @@ -94,13 +87,7 @@ struct sal_to_os_boot *sal_state_for_booting_cpu = &sal_boot_rendez_state[0]; #define set_brendez_area(x) (sal_state_for_booting_cpu = &sal_boot_rendez_state[(x)]); -#define get_idle_for_cpu(x) (idle_thread_array[(x)]) -#define set_idle_for_cpu(x,p) (idle_thread_array[(x)] = (p)) - #else - -#define get_idle_for_cpu(x) (NULL) -#define set_idle_for_cpu(x,p) #define set_brendez_area(x) #endif @@ -480,54 +467,12 @@ struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs) return NULL; } -struct create_idle { - struct work_struct work; - struct task_struct *idle; - struct completion done; - int cpu; -}; - -void __cpuinit -do_fork_idle(struct work_struct *work) -{ - struct create_idle *c_idle = - container_of(work, struct create_idle, work); - - c_idle->idle = fork_idle(c_idle->cpu); - complete(&c_idle->done); -} - static int __cpuinit -do_boot_cpu (int sapicid, int cpu) +do_boot_cpu (int sapicid, int cpu, struct task_struct *idle) { int timeout; - struct create_idle c_idle = { - .work = __WORK_INITIALIZER(c_idle.work, do_fork_idle), - .cpu = cpu, - .done = COMPLETION_INITIALIZER(c_idle.done), - }; - - /* - * We can't use kernel_thread since we must avoid to - * reschedule the child. - */ - c_idle.idle = get_idle_for_cpu(cpu); - if (c_idle.idle) { - init_idle(c_idle.idle, cpu); - goto do_rest; - } - - schedule_work(&c_idle.work); - wait_for_completion(&c_idle.done); - - if (IS_ERR(c_idle.idle)) - panic("failed fork for CPU %d", cpu); - - set_idle_for_cpu(cpu, c_idle.idle); - -do_rest: - task_for_booting_cpu = c_idle.idle; + task_for_booting_cpu = idle; Dprintk("Sending wakeup vector %lu to AP 0x%x/0x%x.\n", ap_wakeup_vector, cpu, sapicid); set_brendez_area(cpu); @@ -811,7 +756,7 @@ __cpu_up(unsigned int cpu, struct task_struct *tidle) per_cpu(cpu_state, cpu) = CPU_UP_PREPARE; /* Processor goes to start_secondary(), sets online flag */ - ret = do_boot_cpu(sapicid, cpu); + ret = do_boot_cpu(sapicid, cpu, tidle); if (ret < 0) return ret; |