From 780f36d8b3fa9572f731d4fb85067b2e45e6f993 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Mon, 6 Dec 2010 11:16:29 -0600 Subject: xen: Use this_cpu_ops Use this_cpu_ops to reduce code size and simplify things in various places. V3->V4: Move instance of this_cpu_inc_return to a later patchset so that this patch can be applied without infrastructure changes. Cc: Jeremy Fitzhardinge Acked-by: H. Peter Anvin Signed-off-by: Christoph Lameter Signed-off-by: Tejun Heo --- drivers/xen/events.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers/xen/events.c') diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 31af0ac31a98..a10c66dc9dda 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -355,7 +355,7 @@ static void unmask_evtchn(int port) struct evtchn_unmask unmask = { .port = port }; (void)HYPERVISOR_event_channel_op(EVTCHNOP_unmask, &unmask); } else { - struct vcpu_info *vcpu_info = __get_cpu_var(xen_vcpu); + struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu); sync_clear_bit(port, &s->evtchn_mask[0]); @@ -1101,7 +1101,7 @@ static void __xen_evtchn_do_upcall(void) { int cpu = get_cpu(); struct shared_info *s = HYPERVISOR_shared_info; - struct vcpu_info *vcpu_info = __get_cpu_var(xen_vcpu); + struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu); unsigned count; do { @@ -1141,8 +1141,8 @@ static void __xen_evtchn_do_upcall(void) BUG_ON(!irqs_disabled()); - count = __get_cpu_var(xed_nesting_count); - __get_cpu_var(xed_nesting_count) = 0; + count = __this_cpu_read(xed_nesting_count); + __this_cpu_write(xed_nesting_count, 0); } while (count != 1 || vcpu_info->evtchn_upcall_pending); out: -- cgit v1.2.3 From b2e4ae69757cdfef4c612a04f097c1e20489a565 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Mon, 6 Dec 2010 11:40:07 -0600 Subject: xen: Use this_cpu_inc_return __this_cpu_inc_return reduces code and simplifies code. Cc: Jeremy Fitzhardinge Acked-by: H. Peter Anvin Signed-off-by: Christoph Lameter --- drivers/xen/events.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/xen/events.c') diff --git a/drivers/xen/events.c b/drivers/xen/events.c index a10c66dc9dda..65f8637d13cf 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -1109,7 +1109,7 @@ static void __xen_evtchn_do_upcall(void) vcpu_info->evtchn_upcall_pending = 0; - if (__get_cpu_var(xed_nesting_count)++) + if (__this_cpu_inc_return(xed_nesting_count) - 1) goto out; #ifndef CONFIG_X86 /* No need for a barrier -- XCHG is a barrier on x86. */ -- cgit v1.2.3