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path: root/drivers/s390/cio/cio.c
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Diffstat (limited to 'drivers/s390/cio/cio.c')
-rw-r--r--drivers/s390/cio/cio.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 9e058c4657a3..77f9c92df4b9 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -46,6 +46,9 @@ debug_info_t *cio_debug_msg_id;
debug_info_t *cio_debug_trace_id;
debug_info_t *cio_debug_crw_id;
+DEFINE_PER_CPU_ALIGNED(struct irb, cio_irb);
+EXPORT_PER_CPU_SYMBOL(cio_irb);
+
/*
* Function: cio_debug_init
* Initializes three debug logs for common I/O:
@@ -560,7 +563,7 @@ static irqreturn_t do_cio_interrupt(int irq, void *dummy)
__this_cpu_write(s390_idle.nohz_delay, 1);
tpi_info = (struct tpi_info *) &get_irq_regs()->int_code;
- irb = (struct irb *) &S390_lowcore.irb;
+ irb = &__get_cpu_var(cio_irb);
sch = (struct subchannel *)(unsigned long) tpi_info->intparm;
if (!sch) {
/* Clear pending interrupt condition. */
@@ -609,7 +612,7 @@ void cio_tsch(struct subchannel *sch)
struct irb *irb;
int irq_context;
- irb = (struct irb *)&S390_lowcore.irb;
+ irb = &__get_cpu_var(cio_irb);
/* Store interrupt response block to lowcore. */
if (tsch(sch->schid, irb) != 0)
/* Not status pending or not operational. */
@@ -746,7 +749,7 @@ __clear_io_subchannel_easy(struct subchannel_id schid)
struct tpi_info ti;
if (tpi(&ti)) {
- tsch(ti.schid, (struct irb *)&S390_lowcore.irb);
+ tsch(ti.schid, &__get_cpu_var(cio_irb));
if (schid_equal(&ti.schid, &schid))
return 0;
}