[S390] irq: external interrupt code passing

The external interrupt handlers have a parameter called ext_int_code.
Besides the name this paramter does not only contain the ext_int_code
but in addition also the "cpu address" (POP) which caused the external
interrupt.
To make the code a bit more obvious pass a struct instead so the called
function can easily distinguish between external interrupt code and
cpu address. The cpu address field however is named "subcode" since
some external interrupt sources do not pass a cpu address but a
different parameter (or none at all).

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index e8fcd928dc7..b17c42df61c 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -532,7 +532,7 @@ void pfault_fini(void)
 static DEFINE_SPINLOCK(pfault_lock);
 static LIST_HEAD(pfault_list);
 
-static void pfault_interrupt(unsigned int ext_int_code,
+static void pfault_interrupt(struct ext_code ext_code,
                              unsigned int param32, unsigned long param64)
 {
         struct task_struct *tsk;
@@ -545,7 +545,7 @@ static void pfault_interrupt(unsigned int ext_int_code,
          * in the 'cpu address' field associated with the
          * external interrupt. 
          */
-        subcode = ext_int_code >> 16;
+        subcode = ext_code.subcode;
         if ((subcode & 0xff00) != __SUBCODE_MASK)
                 return;
         kstat_cpu(smp_processor_id()).irqs[EXTINT_PFL]++;