blackfin, perf: Use common PMU interrupt disabled code

Transition to using the new generic PERF_PMU_CAP_NO_INTERRUPT method for
failing a sampling event when no PMU interrupt is available.

Signed-off-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Steven Miao <realmz6@gmail.com>
Cc: adi-buildroot-devel@lists.sourceforge.net
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1406150200360.16738@vincent-weaver-1.umelst.maine.edu
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 7 insertions, 8 deletions

diff --git a/arch/blackfin/kernel/perf_event.c b/arch/blackfin/kernel/perf_event.c
index 974e55496db3..ea2032013cc2 100644
--- a/arch/blackfin/kernel/perf_event.c
+++ b/arch/blackfin/kernel/perf_event.c
@@ -389,14 +389,6 @@ static int bfin_pmu_event_init(struct perf_event *event)
         if (attr->exclude_hv || attr->exclude_idle)
                 return -EPERM;
 
-        /*
-         * All of the on-chip counters are "limited", in that they have
-         * no interrupts, and are therefore unable to do sampling without
-         * further work and timer assistance.
-         */
-        if (hwc->sample_period)
-                return -EINVAL;
-
         ret = 0;
         switch (attr->type) {
         case PERF_TYPE_RAW:
@@ -490,6 +482,13 @@ static int __init bfin_pmu_init(void)
 {
         int ret;
 
+        /*
+         * All of the on-chip counters are "limited", in that they have
+         * no interrupts, and are therefore unable to do sampling without
+         * further work and timer assistance.
+         */
+        pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
+
         ret = perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
         if (!ret)
                 perf_cpu_notifier(bfin_pmu_notifier);