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| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-08-19 20:50:10 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-16 16:52:32 +0200 |
| commit | 9059d8fa4a3a9153da53da890039f7f956cc9d19 (patch) | |
| tree | 142f12d7843a4000eb9be7dd8a4a933ce2955f72 /include/linux/irq.h | |
| parent | 7f95ec9e4c12fd067febfd57532da1166d75d858 (diff) | |
| download | lwn-9059d8fa4a3a9153da53da890039f7f956cc9d19.tar.gz lwn-9059d8fa4a3a9153da53da890039f7f956cc9d19.zip | |
irq: add irq_desc_without_new
add an irq_desc accessor that will not allocate any sparse entry
but returns failure if there's no entry present.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/irq.h')
| -rw-r--r-- | include/linux/irq.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index cbf471aee1ce..c9ffef7c3b44 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -191,10 +191,23 @@ struct irq_desc { } ____cacheline_internodealigned_in_smp; extern struct irq_desc *irq_to_desc(unsigned int irq); +extern struct irq_desc *__irq_to_desc(unsigned int irq); + +#ifndef CONFIG_HAVE_SPARSE_IRQ + #ifndef CONFIG_HAVE_DYN_ARRAY /* could be removed if we get rid of all irq_desc reference */ extern struct irq_desc irq_desc[NR_IRQS]; +#else +extern struct irq_desc *irq_desc; #endif + +#else + +extern struct irq_desc *sparse_irqs; + +#endif + #define kstat_irqs_this_cpu(DESC) \ ((DESC)->kstat_irqs[smp_processor_id()]) |