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From:   Qi Liu <liuqi115@huawei.com>
To:     <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>
CC:     <linuxarm@huawei.com>, Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>
Subject: [PATCH v3 1/9] perf: Add EVENT_ATTR_ID to simplify event attributes
Date:   Tue, 8 Jun 2021 11:33:13 +0800
Message-ID: <1623123201-45634-2-git-send-email-liuqi115@huawei.com>
In-Reply-To: <1623123201-45634-1-git-send-email-liuqi115@huawei.com>
References: <1623123201-45634-1-git-send-email-liuqi115@huawei.com>
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Similar EVENT_ATTR macros are defined in many PMU drivers,
like HiSilicon PMU driver, Arm PMU driver, Arm SMMU PMU
driver. So add a generic macro to simplify code.

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Qi Liu <liuqi115@huawei.com>
---
 include/linux/perf_event.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index f5a6a2f..2d510ad 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1576,6 +1576,12 @@ static struct perf_pmu_events_attr _var = {				    \
 	.event_str	= _str,						    \
 };
 
+#define PMU_EVENT_ATTR_ID(_name, _show, _id)				\
+	(&((struct perf_pmu_events_attr[]) {				\
+		{ .attr = __ATTR(_name, 0444, _show, NULL),		\
+		  .id = _id, }						\
+	})[0].attr.attr)
+
 #define PMU_FORMAT_ATTR(_name, _format)					\
 static ssize_t								\
 _name##_show(struct device *dev,					\
-- 
2.7.4