diff options
Diffstat (limited to 'kernel/smp.c')
| -rw-r--r-- | kernel/smp.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index 0564571dcdf7..bd9f94028838 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -15,9 +15,9 @@ #include "smpboot.h" -#ifdef CONFIG_USE_GENERIC_SMP_HELPERS enum { CSD_FLAG_LOCK = 0x01, + CSD_FLAG_WAIT = 0x02, }; struct call_function_data { @@ -124,7 +124,7 @@ static void csd_lock(struct call_single_data *csd) static void csd_unlock(struct call_single_data *csd) { - WARN_ON(!(csd->flags & CSD_FLAG_LOCK)); + WARN_ON((csd->flags & CSD_FLAG_WAIT) && !(csd->flags & CSD_FLAG_LOCK)); /* * ensure we're all done before releasing data: @@ -139,13 +139,15 @@ static void csd_unlock(struct call_single_data *csd) * for execution on the given CPU. data must already have * ->func, ->info, and ->flags set. */ -static -void generic_exec_single(int cpu, struct call_single_data *csd, int wait) +static void generic_exec_single(int cpu, struct call_single_data *csd, int wait) { struct call_single_queue *dst = &per_cpu(call_single_queue, cpu); unsigned long flags; int ipi; + if (wait) + csd->flags |= CSD_FLAG_WAIT; + raw_spin_lock_irqsave(&dst->lock, flags); ipi = list_empty(&dst->list); list_add_tail(&csd->list, &dst->list); @@ -340,6 +342,7 @@ void __smp_call_function_single(int cpu, struct call_single_data *csd, } put_cpu(); } +EXPORT_SYMBOL_GPL(__smp_call_function_single); /** * smp_call_function_many(): Run a function on a set of other CPUs. @@ -459,7 +462,6 @@ int smp_call_function(smp_call_func_t func, void *info, int wait) return 0; } EXPORT_SYMBOL(smp_call_function); -#endif /* USE_GENERIC_SMP_HELPERS */ /* Setup configured maximum number of CPUs to activate */ unsigned int setup_max_cpus = NR_CPUS; @@ -524,6 +526,11 @@ void __init setup_nr_cpu_ids(void) nr_cpu_ids = find_last_bit(cpumask_bits(cpu_possible_mask),NR_CPUS) + 1; } +void __weak smp_announce(void) +{ + printk(KERN_INFO "Brought up %d CPUs\n", num_online_cpus()); +} + /* Called by boot processor to activate the rest. */ void __init smp_init(void) { @@ -540,7 +547,7 @@ void __init smp_init(void) } /* Any cleanup work */ - printk(KERN_INFO "Brought up %ld CPUs\n", (long)num_online_cpus()); + smp_announce(); smp_cpus_done(setup_max_cpus); } |