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genirq: Add internal state field to irq_desc

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That field will contain internal state information which is not going
to be exposed to anything outside the core code - except via accessor
functions. I'm tired of everyone fiddling in irq_desc.status.

core_internal_state__do_not_mess_with_it is clear enough, annoying to
type and easy to grep for. Offenders will be tracked down and slapped
with stinking trouts.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2011-02-07 20:19:55 +01:00
parent 35e857cbeb
commit dbec07bac6
2 changed files with 8 additions and 1 deletions
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3
include/linux/irqdesc.h
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@ -19,6 +19,7 @@ struct timer_rand_state;
* @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()]
* @action: the irq action chain
* @status: status information
* @core_internal_state__do_not_mess_with_it: core internal status information
* @depth: disable-depth, for nested irq_disable() calls
* @wake_depth: enable depth, for multiple set_irq_wake() callers
* @irq_count: stats field to detect stalled irqs
@ -63,7 +64,7 @@ struct irq_desc {
irq_flow_handler_t handle_irq;
struct irqaction *action; /* IRQ action list */
unsigned int status; /* IRQ status */
unsigned int core_internal_state__do_not_mess_with_it;
unsigned int depth; /* nested irq disables */
unsigned int wake_depth; /* nested wake enables */
unsigned int irq_count; /* For detecting broken IRQs */

6
kernel/irq/internals.h
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@ -1,5 +1,9 @@
/*
* IRQ subsystem internal functions and variables:
*
* Do not ever include this file from anything else than
* kernel/irq/. Do not even think about using any information outside
* of this file for your non core code.
*/
#include <linux/irqdesc.h>
@ -9,6 +13,8 @@
# define IRQ_BITMAP_BITS NR_IRQS
#endif
#define istate core_internal_state__do_not_mess_with_it
extern int noirqdebug;
/*