[IA64] sn2: add missing put_cpu()

sn_hwperf_op_cpu() uses get_cpu() but is missing a corresponding put_cpu().

Reported-by: Thomas Meyer <thomas@m3y3r.de>
Acked-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
index 30862c0358cd..2de41d44266e 100644
--- a/arch/ia64/sn/kernel/sn2/sn_hwperf.c
+++ b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
@@ -615,11 +615,15 @@ static int sn_hwperf_op_cpu(struct sn_hwperf_op_info *op_info)
                 }
         }
 
-        if (cpu == SN_HWPERF_ARG_ANY_CPU || cpu == get_cpu()) {
-                /* don't care, or already on correct cpu */
+        if (cpu == SN_HWPERF_ARG_ANY_CPU) {
+                /* don't care which cpu */
                 sn_hwperf_call_sal(op_info);
-        }
-        else {
+        } else if (cpu == get_cpu()) {
+                /* already on correct cpu */
+                sn_hwperf_call_sal(op_info);
+                put_cpu();
+        } else {
+                put_cpu();
                 if (use_ipi) {
                         /* use an interprocessor interrupt to call SAL */
                         smp_call_function_single(cpu, sn_hwperf_call_sal,