metag: perf: use hard_processor_id() to get thread

Use hard_processor_id() to get the current thread number rather than
get_cpu() and the hardware thread mapping. There was no matching
put_cpu(), and in any case this should be slightly more efficient.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>

diff --git a/arch/metag/kernel/perf/perf_event.c b/arch/metag/kernel/perf/perf_event.c
index 6210126..54fde35 100644 (file)
--- a/arch/metag/kernel/perf/perf_event.c
+++ b/arch/metag/kernel/perf/perf_event.c
@@ -22,9 +22,9 @@
 #include <linux/slab.h>
 
 #include <asm/core_reg.h>
-#include <asm/hwthread.h>
 #include <asm/io.h>
 #include <asm/irq.h>
+#include <asm/processor.h>
 
 #include "perf_event.h"
 
@@ -651,7 +651,7 @@ static void metag_pmu_enable_counter(struct hw_perf_event *event, int idx)
        }
 
        tmp = ((config & 0xf) << 28) |
-                       ((1 << 24) << cpu_2_hwthread_id[get_cpu()]);
+                       ((1 << 24) << hard_processor_id());
        if (metag_pmu->max_period)
                /*
                 * Cores supporting overflow interrupts may have had the counter