Commit-ID: be4034016c11f8913d38fccf692007fab1c50be1
Gitweb: http://git.kernel.org/tip/be4034016c11f8913d38fccf692007fab1c50be1
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Wed, 7 May 2014 15:44:20 +0000
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Fri, 16 May 2014 14:05:22 +0200
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@xxxxxxxxxxxxx>
Reviewed-by: Grant Likely <grant.likely@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: linux390@xxxxxxxxxx
Link: http://lkml.kernel.org/r/20140507154339.811205235@xxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
arch/s390/kernel/irq.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index 2fb0998..99b0b09 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -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.
*/
--
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