| From: Thomas Gleixner <tglx@linutronix.de> |
| Date: Tue, 21 Jul 2009 22:34:14 +0200 |
| Subject: rt: local_irq_* variants depending on RT/!RT |
| |
| Add local_irq_*_(no)rt variant which are mainly used to break |
| interrupt disabled sections on PREEMPT_RT or to explicitely disable |
| interrupts on PREEMPT_RT. |
| |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| |
| --- |
| include/linux/interrupt.h | 2 +- |
| include/linux/irqflags.h | 19 +++++++++++++++++++ |
| 2 files changed, 20 insertions(+), 1 deletion(-) |
| |
| --- a/include/linux/interrupt.h |
| +++ b/include/linux/interrupt.h |
| @@ -211,7 +211,7 @@ extern void devm_free_irq(struct device |
| #ifdef CONFIG_LOCKDEP |
| # define local_irq_enable_in_hardirq() do { } while (0) |
| #else |
| -# define local_irq_enable_in_hardirq() local_irq_enable() |
| +# define local_irq_enable_in_hardirq() local_irq_enable_nort() |
| #endif |
| |
| extern void disable_irq_nosync(unsigned int irq); |
| --- a/include/linux/irqflags.h |
| +++ b/include/linux/irqflags.h |
| @@ -147,4 +147,23 @@ |
| |
| #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */ |
| |
| +/* |
| + * local_irq* variants depending on RT/!RT |
| + */ |
| +#ifdef CONFIG_PREEMPT_RT_FULL |
| +# define local_irq_disable_nort() do { } while (0) |
| +# define local_irq_enable_nort() do { } while (0) |
| +# define local_irq_save_nort(flags) do { local_save_flags(flags); } while (0) |
| +# define local_irq_restore_nort(flags) do { (void)(flags); } while (0) |
| +# define local_irq_disable_rt() local_irq_disable() |
| +# define local_irq_enable_rt() local_irq_enable() |
| +#else |
| +# define local_irq_disable_nort() local_irq_disable() |
| +# define local_irq_enable_nort() local_irq_enable() |
| +# define local_irq_save_nort(flags) local_irq_save(flags) |
| +# define local_irq_restore_nort(flags) local_irq_restore(flags) |
| +# define local_irq_disable_rt() do { } while (0) |
| +# define local_irq_enable_rt() do { } while (0) |
| +#endif |
| + |
| #endif |
