Commit be403401 authored May 07, 2014 by Thomas Gleixner

s390: Avoid call to irq_reserve_irqs()



There is no need to mark the lower interrupts as reserved in order to
exclude them from dynamic allocation.

Provide arch_dynirq_lower_bound() to exclude the lower space.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux390@de.ibm.com
Link: http://lkml.kernel.org/r/20140507154339.811205235@linutronix.de


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent 5fdaf1bf

arch/s390/kernel/irq.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -92,7 +92,6 @@ static const struct irq_class irqclass_sub_desc[NR_ARCH_IRQS] = {

		void __init init_IRQ(void)
		{
		irq_reserve_irqs(0, THIN_INTERRUPT);
		init_cio_interrupts();
		init_airq_interrupts();
		init_ext_interrupts();
		@@ -151,6 +150,11 @@ out:
		return 0;
		}

		unsigned int arch_dynirq_lower_bound(unsigned int from)
		{
		return from < THIN_INTERRUPT ? THIN_INTERRUPT : from;
		}

		/*
		* Switch to the asynchronous interrupt stack for softirq execution.
		*/