x86, uv: Remove recursion in uv_heartbeat_enable()

The recursion is not needed and does not improve readability.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
LKML-Reference: <4B45F13E.3040202@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 4 insertions, 5 deletions

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index af5d103bb533..d199dc34f54a 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -475,7 +475,7 @@ static void uv_heartbeat(unsigned long ignored)
 
 static void __cpuinit uv_heartbeat_enable(int cpu)
 {
-        if (!uv_cpu_hub_info(cpu)->scir.enabled) {
+        while (!uv_cpu_hub_info(cpu)->scir.enabled) {
                 struct timer_list *timer = &uv_cpu_hub_info(cpu)->scir.timer;
 
                 uv_set_cpu_scir_bits(cpu, SCIR_CPU_HEARTBEAT|SCIR_CPU_ACTIVITY);
@@ -483,11 +483,10 @@ static void __cpuinit uv_heartbeat_enable(int cpu)
                 timer->expires = jiffies + SCIR_CPU_HB_INTERVAL;
                 add_timer_on(timer, cpu);
                 uv_cpu_hub_info(cpu)->scir.enabled = 1;
-        }
 
-        /* check boot cpu */
-        if (!uv_cpu_hub_info(0)->scir.enabled)
-                uv_heartbeat_enable(0);
+                /* also ensure that boot cpu is enabled */
+                cpu = 0;
+        }
 }
 
 #ifdef CONFIG_HOTPLUG_CPU