diff options
| author | Ingo Molnar <mingo@kernel.org> | 2016-04-13 08:57:03 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-04-13 08:57:03 +0200 |
| commit | 889fac6d67d46a5e781c08fb26fec9016db1c307 (patch) | |
| tree | 7e01d04928f7ce343afff5b77ba13c2f3d083326 /include/linux/interrupt.h | |
| parent | dad38ca64a252144b4ccdfe9730a3fe2b7c61957 (diff) | |
| parent | bf16200689118d19de1b8d2a3c314fc21f5dc7bb (diff) | |
Merge tag 'v4.6-rc3' into perf/core, to refresh the tree
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/interrupt.h')
| -rw-r--r-- | include/linux/interrupt.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 0e95fcc75b2a..9fcabeb07787 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -125,6 +125,16 @@ struct irqaction { extern irqreturn_t no_action(int cpl, void *dev_id); +/* + * If a (PCI) device interrupt is not connected we set dev->irq to + * IRQ_NOTCONNECTED. This causes request_irq() to fail with -ENOTCONN, so we + * can distingiush that case from other error returns. + * + * 0x80000000 is guaranteed to be outside the available range of interrupts + * and easy to distinguish from other possible incorrect values. + */ +#define IRQ_NOTCONNECTED (1U << 31) + extern int __must_check request_threaded_irq(unsigned int irq, irq_handler_t handler, irq_handler_t thread_fn, @@ -673,4 +683,24 @@ extern int early_irq_init(void); extern int arch_probe_nr_irqs(void); extern int arch_early_irq_init(void); +#if defined(CONFIG_FUNCTION_GRAPH_TRACER) || defined(CONFIG_KASAN) +/* + * We want to know which function is an entrypoint of a hardirq or a softirq. + */ +#define __irq_entry __attribute__((__section__(".irqentry.text"))) +#define __softirq_entry \ + __attribute__((__section__(".softirqentry.text"))) + +/* Limits of hardirq entrypoints */ +extern char __irqentry_text_start[]; +extern char __irqentry_text_end[]; +/* Limits of softirq entrypoints */ +extern char __softirqentry_text_start[]; +extern char __softirqentry_text_end[]; + +#else +#define __irq_entry +#define __softirq_entry +#endif + #endif |