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metag: perf: use hard_processor_id() to get thread

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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>
This commit is contained in:
James Hogan 2013-02-27 16:48:42 +00:00
parent 2033dc54e6
commit 9344de1b1c
1 changed files with 2 additions and 2 deletions
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4
arch/metag/kernel/perf/perf_event.c
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@ -22,9 +22,9 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <asm/core_reg.h> #include <asm/core_reg.h>
#include <asm/hwthread.h>
#include <asm/io.h> #include <asm/io.h>
#include <asm/irq.h> #include <asm/irq.h>
#include <asm/processor.h>
#include "perf_event.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) | tmp = ((config & 0xf) << 28) |
((1 << 24) << cpu_2_hwthread_id[get_cpu()]); ((1 << 24) << hard_processor_id());
if (metag_pmu->max_period) if (metag_pmu->max_period)
/* /*
* Cores supporting overflow interrupts may have had the counter * Cores supporting overflow interrupts may have had the counter