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Merge branch 'core/softirq' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'core/softirq' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  softirq: remove irqs_disabled warning from local_bh_enable
  softirq: remove initialization of static per-cpu variable
  Remove argument from open_softirq which is always NULL
This commit is contained in:
Linus Torvalds 2008-07-14 15:28:42 -07:00
commit 666484f025
9 changed files with 29 additions and 59 deletions
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2
block/blk-core.c
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@ -2048,7 +2048,7 @@ int __init blk_dev_init(void)
for_each_possible_cpu(i)
INIT_LIST_HEAD(&per_cpu(blk_cpu_done, i));
open_softirq(BLOCK_SOFTIRQ, blk_done_softirq, NULL);
open_softirq(BLOCK_SOFTIRQ, blk_done_softirq);
register_hotcpu_notifier(&blk_cpu_notifier);
return 0;

3
include/linux/interrupt.h
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@ -285,12 +285,11 @@ enum
struct softirq_action
{
void (*action)(struct softirq_action *);
void *data;
};
asmlinkage void do_softirq(void);
asmlinkage void __do_softirq(void);
extern void open_softirq(int nr, void (*action)(struct softirq_action*), void *data);
extern void open_softirq(int nr, void (*action)(struct softirq_action *));
extern void softirq_init(void);
#define __raise_softirq_irqoff(nr) do { or_softirq_pending(1UL << (nr)); } while (0)
extern void raise_softirq_irqoff(unsigned int nr);

2
kernel/hrtimer.c
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@ -1677,7 +1677,7 @@ void __init hrtimers_init(void)
(void *)(long)smp_processor_id());
register_cpu_notifier(&hrtimers_nb);
#ifdef CONFIG_HIGH_RES_TIMERS
open_softirq(HRTIMER_SOFTIRQ, run_hrtimer_softirq, NULL);
open_softirq(HRTIMER_SOFTIRQ, run_hrtimer_softirq);
#endif
}

2
kernel/rcuclassic.c
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@ -543,7 +543,7 @@ static void __cpuinit rcu_online_cpu(int cpu)
rcu_init_percpu_data(cpu, &rcu_ctrlblk, rdp);
rcu_init_percpu_data(cpu, &rcu_bh_ctrlblk, bh_rdp);
open_softirq(RCU_SOFTIRQ, rcu_process_callbacks, NULL);
open_softirq(RCU_SOFTIRQ, rcu_process_callbacks);
}
static int __cpuinit rcu_cpu_notify(struct notifier_block *self,

2
kernel/rcupreempt.c
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@ -1119,7 +1119,7 @@ void __init __rcu_init(void)
for_each_online_cpu(cpu)
rcu_cpu_notify(&rcu_nb, CPU_UP_PREPARE, (void *)(long) cpu);
open_softirq(RCU_SOFTIRQ, rcu_process_callbacks, NULL);
open_softirq(RCU_SOFTIRQ, rcu_process_callbacks);
}
/*

2
kernel/sched.c
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@ -8152,7 +8152,7 @@ void __init sched_init(void)
#endif
#ifdef CONFIG_SMP
open_softirq(SCHED_SOFTIRQ, run_rebalance_domains, NULL);
open_softirq(SCHED_SOFTIRQ, run_rebalance_domains);
#endif
#ifdef CONFIG_RT_MUTEXES

69
kernel/softirq.c
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@ -131,48 +131,11 @@ 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);
#endif
/*
* Are softirqs going to be turned on now:
*/
if (softirq_count() == SOFTIRQ_OFFSET)
trace_softirqs_on((unsigned long)__builtin_return_address(0));
/*
* 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();
}
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);
local_irq_disable();
#endif
/*
* Are softirqs going to be turned on now:
@ -190,10 +153,21 @@ void local_bh_enable_ip(unsigned long ip)
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)
{
_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)

2
kernel/timer.c
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@ -1502,7 +1502,7 @@ void __init init_timers(void)
BUG_ON(err == NOTIFY_BAD);
register_cpu_notifier(&timers_nb);
open_softirq(TIMER_SOFTIRQ, run_timer_softirq, NULL);
open_softirq(TIMER_SOFTIRQ, run_timer_softirq);
}
/**

4
net/core/dev.c
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@ -4585,8 +4585,8 @@ static int __init net_dev_init(void)
dev_boot_phase = 0;
open_softirq(NET_TX_SOFTIRQ, net_tx_action, NULL);
open_softirq(NET_RX_SOFTIRQ, net_rx_action, NULL);
open_softirq(NET_TX_SOFTIRQ, net_tx_action);
open_softirq(NET_RX_SOFTIRQ, net_rx_action);
hotcpu_notifier(dev_cpu_callback, 0);
dst_init();