linux-kernel - [PATCH -next] clockevents: use DEVICE_ATTR

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Date:   Sun, 23 May 2021 14:58:25 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <tglx@...utronix.de>, <yuehaibing@...wei.com>
CC:     <linux-kernel@...r.kernel.org>
Subject: [PATCH -next] clockevents: use DEVICE_ATTR_<RO|WO> macro

Use DEVICE_ATTR_<RO|WO> helper instead of plain DEVICE_ATTR,
which makes the code a bit shorter and easier to read.

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 kernel/time/clockevents.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index f5490222e134..0056d2bed53e 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -668,9 +668,9 @@ static struct bus_type clockevents_subsys = {
 static DEFINE_PER_CPU(struct device, tick_percpu_dev);
 static struct tick_device *tick_get_tick_dev(struct device *dev);
 
-static ssize_t sysfs_show_current_tick_dev(struct device *dev,
-					   struct device_attribute *attr,
-					   char *buf)
+static ssize_t current_device_show(struct device *dev,
+				   struct device_attribute *attr,
+				   char *buf)
 {
 	struct tick_device *td;
 	ssize_t count = 0;
@@ -682,12 +682,12 @@ static ssize_t sysfs_show_current_tick_dev(struct device *dev,
 	raw_spin_unlock_irq(&clockevents_lock);
 	return count;
 }
-static DEVICE_ATTR(current_device, 0444, sysfs_show_current_tick_dev, NULL);
+static DEVICE_ATTR_RO(current_device);
 
 /* We don't support the abomination of removable broadcast devices */
-static ssize_t sysfs_unbind_tick_dev(struct device *dev,
-				     struct device_attribute *attr,
-				     const char *buf, size_t count)
+static ssize_t unbind_device_store(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t count)
 {
 	char name[CS_NAME_LEN];
 	ssize_t ret = sysfs_get_uname(buf, name, count);
@@ -714,7 +714,7 @@ static ssize_t sysfs_unbind_tick_dev(struct device *dev,
 	mutex_unlock(&clockevents_mutex);
 	return ret ? ret : count;
 }
-static DEVICE_ATTR(unbind_device, 0200, NULL, sysfs_unbind_tick_dev);
+static DEVICE_ATTR_WO(unbind_device);
 
 #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
 static struct device tick_bc_dev = {
-- 
2.17.1