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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2013-06-17 14:54:02 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-06-26 21:10:23 +0200
commit48f6b00c6e3190b786c44731b25ac124c81c2247 (patch)
treec06d6ba767544eba04a2cd47db1c303f6a35d9f7 /arch/s390/kernel/irq.c
parent4bdb613ff45ef5f2848584b250f8a65f6d6c5755 (diff)
downloadlinux-48f6b00c6e3190b786c44731b25ac124c81c2247.tar.bz2
s390/irq: store interrupt information in pt_regs
Copy the interrupt parameters from the lowcore to the pt_regs structure in entry[64].S and reduce the arguments of the low level interrupt handler to the pt_regs pointer only. In addition move the test-pending-interrupt loop from do_IRQ to entry[64].S to make sure that interrupt information is always delivered via pt_regs. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/irq.c')
-rw-r--r--arch/s390/kernel/irq.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index dd3c1994b8bd..54b0995514e8 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -234,9 +234,9 @@ int unregister_external_interrupt(u16 code, ext_int_handler_t handler)
}
EXPORT_SYMBOL(unregister_external_interrupt);
-void __irq_entry do_extint(struct pt_regs *regs, struct ext_code ext_code,
- unsigned int param32, unsigned long param64)
+void __irq_entry do_extint(struct pt_regs *regs)
{
+ struct ext_code ext_code;
struct pt_regs *old_regs;
struct ext_int_info *p;
int index;
@@ -248,6 +248,7 @@ void __irq_entry do_extint(struct pt_regs *regs, struct ext_code ext_code,
clock_comparator_work();
}
kstat_incr_irqs_this_cpu(EXTERNAL_INTERRUPT, NULL);
+ ext_code = *(struct ext_code *) &regs->int_code;
if (ext_code.code != 0x1004)
__get_cpu_var(s390_idle).nohz_delay = 1;
@@ -255,7 +256,8 @@ void __irq_entry do_extint(struct pt_regs *regs, struct ext_code ext_code,
rcu_read_lock();
list_for_each_entry_rcu(p, &ext_int_hash[index], entry)
if (likely(p->code == ext_code.code))
- p->handler(ext_code, param32, param64);
+ p->handler(ext_code, regs->int_parm,
+ regs->int_parm_long);
rcu_read_unlock();
irq_exit();
set_irq_regs(old_regs);