linux-kernel - [PATCH 1/9] perf: Add PMU_FORMAT_ATTR

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Message-Id: <20221201195704.2330866-1-kan.liang@linux.intel.com>
Date:   Thu,  1 Dec 2022 11:56:56 -0800
From:   kan.liang@...ux.intel.com
To:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        linux-kernel@...r.kernel.org
Cc:     ak@...ux.intel.com, eranian@...gle.com, irogers@...gle.com,
        Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH 1/9] perf: Add PMU_FORMAT_ATTR_SHOW

From: Kan Liang <kan.liang@...ux.intel.com>

The macro PMU_FORMAT_ATTR facilitates the definition of both the "show"
function and "format_attr". But it only works for a non-hybrid platform.
For a hybrid platform, the name "format_attr_hybrid_" is used.

The definition of the "show" function can be shared between a non-hybrid
platform and a hybrid platform. Add a new macro PMU_FORMAT_ATTR_SHOW.

No functional change. The PMU_FORMAT_ATTR_SHOW will be used in the
following patch.

Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
---
 include/linux/perf_event.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 0031f7b4d9ab..ab251c737f97 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1661,7 +1661,7 @@ static struct perf_pmu_events_attr _var = {				    \
 		  .id = _id, }						\
 	})[0].attr.attr)
 
-#define PMU_FORMAT_ATTR(_name, _format)					\
+#define PMU_FORMAT_ATTR_SHOW(_name, _format)				\
 static ssize_t								\
 _name##_show(struct device *dev,					\
 			       struct device_attribute *attr,		\
@@ -1670,6 +1670,9 @@ _name##_show(struct device *dev,					\
 	BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE);			\
 	return sprintf(page, _format "\n");				\
 }									\
+
+#define PMU_FORMAT_ATTR(_name, _format)					\
+	PMU_FORMAT_ATTR_SHOW(_name, _format)				\
 									\
 static struct device_attribute format_attr_##_name = __ATTR_RO(_name)
 
-- 
2.35.1