linux-kernel - [PATCH] x86: perf: rapl: use unified perf_event_sysfs

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Date:	Fri, 4 Dec 2015 18:07:41 +0800
From:	Huang Rui <ray.huang@....com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Borislav Petkov <bp@...e.de>, "Ingo Molnar" <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Stephane Eranian <eranian@...gle.com>,
	Andy Lutomirski <luto@...capital.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Dasaratharaman Chandramouli 
	<dasaratharaman.chandramouli@...el.com>,
	Robert Richter <rric@...nel.org>
CC:	<linux-kernel@...r.kernel.org>, <x86@...nel.org>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Tony Li <tony.li@....com>, Huang Rui <ray.huang@....com>
Subject: [PATCH] x86: perf: rapl: use unified perf_event_sysfs_show instead of special interface

Actually, rapl_sysfs_show is a duplicate of perf_event_sysfs_show. We
prefer to use the unified interface.

Signed-off-by: Huang Rui <ray.huang@....com>
---
 arch/x86/kernel/cpu/perf_event_intel_rapl.c | 23 +++++------------------
 1 file changed, 5 insertions(+), 18 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event_intel_rapl.c b/arch/x86/kernel/cpu/perf_event_intel_rapl.c
index ed446bd..6a32df4 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_rapl.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_rapl.c
@@ -109,11 +109,11 @@ static struct kobj_attribute format_attr_##_var =		\
 
 #define RAPL_CNTR_WIDTH 32 /* 32-bit rapl counters */
 
-#define RAPL_EVENT_ATTR_STR(_name, v, str)				\
-static struct perf_pmu_events_attr event_attr_##v = {			\
-	.attr		= __ATTR(_name, 0444, rapl_sysfs_show, NULL),	\
-	.id		= 0,						\
-	.event_str	= str,						\
+#define RAPL_EVENT_ATTR_STR(_name, v, str)					\
+static struct perf_pmu_events_attr event_attr_##v = {				\
+	.attr		= __ATTR(_name, 0444, perf_event_sysfs_show, NULL),	\
+	.id		= 0,							\
+	.event_str	= str,							\
 };
 
 struct rapl_pmu {
@@ -405,19 +405,6 @@ static struct attribute_group rapl_pmu_attr_group = {
 	.attrs = rapl_pmu_attrs,
 };
 
-static ssize_t rapl_sysfs_show(struct device *dev,
-			       struct device_attribute *attr,
-			       char *page)
-{
-	struct perf_pmu_events_attr *pmu_attr = \
-		container_of(attr, struct perf_pmu_events_attr, attr);
-
-	if (pmu_attr->event_str)
-		return sprintf(page, "%s", pmu_attr->event_str);
-
-	return 0;
-}
-
 RAPL_EVENT_ATTR_STR(energy-cores, rapl_cores, "event=0x01");
 RAPL_EVENT_ATTR_STR(energy-pkg  ,   rapl_pkg, "event=0x02");
 RAPL_EVENT_ATTR_STR(energy-ram  ,   rapl_ram, "event=0x03");
-- 
2.1.4

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