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[PATCH] lockdep: add disable/enable_irq_lockdep() API

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lockdep wants to use the disable_irq()/enable_irq() prototypes before they are
provied by the platform's asm/irq.h.  So move them out of the
CONFIG_GENERIC_HARDIRQS define - all architectures have a common prototype for
this anyway.

Add special lockdep variants of irq line disabling/enabling.

These should be used for locking constructs that know that a particular irq
context which is disabled, and which is the only irq-context user of a lock,
that it's safe to take the lock in the irq-disabled section without disabling
hardirqs.

[akpm@osdl.org: build fix]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar 2006-07-03 00:24:27 -07:00 committed by Linus Torvalds
parent a875a69f8b
commit c01d403b2e
1 changed files with 48 additions and 1 deletions
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49
include/linux/interrupt.h
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@ -86,6 +86,41 @@ extern void disable_irq_nosync(unsigned int irq);
extern void disable_irq(unsigned int irq);
extern void enable_irq(unsigned int irq);
/*
* Special lockdep variants of irq disabling/enabling.
* These should be used for locking constructs that
* know that a particular irq context which is disabled,
* and which is the only irq-context user of a lock,
* that it's safe to take the lock in the irq-disabled
* section without disabling hardirqs.
*
* On !CONFIG_LOCKDEP they are equivalent to the normal
* irq disable/enable methods.
*/
static inline void disable_irq_nosync_lockdep(unsigned int irq)
{
disable_irq_nosync(irq);
#ifdef CONFIG_LOCKDEP
local_irq_disable();
#endif
}
static inline void disable_irq_lockdep(unsigned int irq)
{
disable_irq(irq);
#ifdef CONFIG_LOCKDEP
local_irq_disable();
#endif
}
static inline void enable_irq_lockdep(unsigned int irq)
{
#ifdef CONFIG_LOCKDEP
local_irq_enable();
#endif
enable_irq(irq);
}
/* IRQ wakeup (PM) control: */
extern int set_irq_wake(unsigned int irq, unsigned int on);
@ -99,7 +134,19 @@ static inline int disable_irq_wake(unsigned int irq)
return set_irq_wake(irq, 0);
}
#endif
#else /* !CONFIG_GENERIC_HARDIRQS */
/*
* NOTE: non-genirq architectures, if they want to support the lock
* validator need to define the methods below in their asm/irq.h
* files, under an #ifdef CONFIG_LOCKDEP section.
*/
# ifndef CONFIG_LOCKDEP
# define disable_irq_nosync_lockdep(irq) disable_irq_nosync(irq)
# define disable_irq_lockdep(irq) disable_irq(irq)
# define enable_irq_lockdep(irq) enable_irq(irq)
# endif
#endif /* CONFIG_GENERIC_HARDIRQS */
#ifndef __ARCH_SET_SOFTIRQ_PENDING
#define set_softirq_pending(x) (local_softirq_pending() = (x))