mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-11-20 08:38:24 +08:00
softirq: remove irqs_disabled warning from local_bh_enable
There's no need to use local_irq_save() over local_irq_disable() in the local_bh_enable code since it is a bug to call it with irqs disabled and do_softirq will enable irqs if there is any pending work. Consolidate the code from local_bh_enable and ..._ip to avoid having a disconnect between them in the warnings they trigger that is currently there. Also always trigger the warning on in_irq(), not just in the trace-irqflags case. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Michael Buesch <mb@bu3sch.de> Cc: David Ellingsworth <david@identd.dyndns.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
parent
4620b49f76
commit
0f476b6d91
@ -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);
|
||||
|
||||
/*
|
||||
|
Loading…
Reference in New Issue
Block a user