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author | Ingo Molnar <mingo@elte.hu> | 2008-07-18 19:53:16 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-07-18 19:53:16 +0200 |
commit | 9b610fda0df5d0f0b0c64242e37441ad1b384aac (patch) | |
tree | 0ea14b15f2e6546f37fe18d8ac3dc83077ec0e55 /kernel/softirq.c | |
parent | b8f8c3cf0a4ac0632ec3f0e15e9dc0c29de917af (diff) | |
parent | 5b664cb235e97afbf34db9c4d77f08ebd725335e (diff) | |
download | kernel_samsung_smdk4412-9b610fda0df5d0f0b0c64242e37441ad1b384aac.zip kernel_samsung_smdk4412-9b610fda0df5d0f0b0c64242e37441ad1b384aac.tar.gz kernel_samsung_smdk4412-9b610fda0df5d0f0b0c64242e37441ad1b384aac.tar.bz2 |
Merge branch 'linus' into timers/nohz
Diffstat (limited to 'kernel/softirq.c')
-rw-r--r-- | kernel/softirq.c | 67 |
1 files changed, 19 insertions, 48 deletions
diff --git a/kernel/softirq.c b/kernel/softirq.c index 05f2480..f6b03d5 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -131,23 +131,17 @@ void _local_bh_enable(void) EXPORT_SYMBOL(_local_bh_enable); -void local_bh_enable(void) +static inline void _local_bh_enable_ip(unsigned long ip) { + WARN_ON_ONCE(in_irq() || irqs_disabled()); #ifdef CONFIG_TRACE_IRQFLAGS - unsigned long flags; - - WARN_ON_ONCE(in_irq()); -#endif - WARN_ON_ONCE(irqs_disabled()); - -#ifdef CONFIG_TRACE_IRQFLAGS - local_irq_save(flags); + local_irq_disable(); #endif /* * Are softirqs going to be turned on now: */ if (softirq_count() == SOFTIRQ_OFFSET) - trace_softirqs_on((unsigned long)__builtin_return_address(0)); + trace_softirqs_on(ip); /* * Keep preemption disabled until we are done with * softirq processing: @@ -159,40 +153,20 @@ void local_bh_enable(void) dec_preempt_count(); #ifdef CONFIG_TRACE_IRQFLAGS - local_irq_restore(flags); + local_irq_enable(); #endif preempt_check_resched(); } + +void local_bh_enable(void) +{ + _local_bh_enable_ip((unsigned long)__builtin_return_address(0)); +} EXPORT_SYMBOL(local_bh_enable); void local_bh_enable_ip(unsigned long ip) { -#ifdef CONFIG_TRACE_IRQFLAGS - unsigned long flags; - - WARN_ON_ONCE(in_irq()); - - local_irq_save(flags); -#endif - /* - * Are softirqs going to be turned on now: - */ - if (softirq_count() == SOFTIRQ_OFFSET) - trace_softirqs_on(ip); - /* - * Keep preemption disabled until we are done with - * softirq processing: - */ - sub_preempt_count(SOFTIRQ_OFFSET - 1); - - if (unlikely(!in_interrupt() && local_softirq_pending())) - do_softirq(); - - dec_preempt_count(); -#ifdef CONFIG_TRACE_IRQFLAGS - local_irq_restore(flags); -#endif - preempt_check_resched(); + _local_bh_enable_ip(ip); } EXPORT_SYMBOL(local_bh_enable_ip); @@ -347,9 +321,8 @@ void raise_softirq(unsigned int nr) local_irq_restore(flags); } -void open_softirq(int nr, void (*action)(struct softirq_action*), void *data) +void open_softirq(int nr, void (*action)(struct softirq_action *)) { - softirq_vec[nr].data = data; softirq_vec[nr].action = action; } @@ -360,10 +333,8 @@ struct tasklet_head struct tasklet_struct **tail; }; -/* Some compilers disobey section attribute on statics when not - initialized -- RR */ -static DEFINE_PER_CPU(struct tasklet_head, tasklet_vec) = { NULL }; -static DEFINE_PER_CPU(struct tasklet_head, tasklet_hi_vec) = { NULL }; +static DEFINE_PER_CPU(struct tasklet_head, tasklet_vec); +static DEFINE_PER_CPU(struct tasklet_head, tasklet_hi_vec); void __tasklet_schedule(struct tasklet_struct *t) { @@ -503,8 +474,8 @@ void __init softirq_init(void) &per_cpu(tasklet_hi_vec, cpu).head; } - open_softirq(TASKLET_SOFTIRQ, tasklet_action, NULL); - open_softirq(HI_SOFTIRQ, tasklet_hi_action, NULL); + open_softirq(TASKLET_SOFTIRQ, tasklet_action); + open_softirq(HI_SOFTIRQ, tasklet_hi_action); } static int ksoftirqd(void * __bind_cpu) @@ -645,7 +616,7 @@ static int __cpuinit cpu_callback(struct notifier_block *nfb, p = per_cpu(ksoftirqd, hotcpu); per_cpu(ksoftirqd, hotcpu) = NULL; - sched_setscheduler(p, SCHED_FIFO, ¶m); + sched_setscheduler_nocheck(p, SCHED_FIFO, ¶m); kthread_stop(p); takeover_tasklets(hotcpu); break; @@ -674,12 +645,12 @@ __init int spawn_ksoftirqd(void) /* * Call a function on all processors */ -int on_each_cpu(void (*func) (void *info), void *info, int retry, int wait) +int on_each_cpu(void (*func) (void *info), void *info, int wait) { int ret = 0; preempt_disable(); - ret = smp_call_function(func, info, retry, wait); + ret = smp_call_function(func, info, wait); local_irq_disable(); func(info); local_irq_enable(); |