clocksource: Use DEVICE_ATTR_RW/RO/WO to define device attributes

Convert DEVICE_ATTR to DEVICE_ATTR_RW/RO/WO which is the preferred and
simpler way of implementation.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: arnd@arndb.de
Cc: sboyd@codeaurora.org
Cc: broonie@kernel.org
Cc: john.stultz@linaro.org
Link: https://lkml.kernel.org/r/8f35c77e753e957b61187e8e7b2e4a3d61e4a72b.1516167691.git.baolin.wang@linaro.org

diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index c5fdcb1..7ce5346 100644 (file)
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -857,16 +857,16 @@ EXPORT_SYMBOL(clocksource_unregister);
 
 #ifdef CONFIG_SYSFS
 /**
- * sysfs_show_current_clocksources - sysfs interface for current clocksource
+ * current_clocksource_show - sysfs interface for current clocksource
  * @dev:       unused
  * @attr:      unused
  * @buf:       char buffer to be filled with clocksource list
  *
  * Provides sysfs interface for listing current clocksource.
  */
-static ssize_t
-sysfs_show_current_clocksources(struct device *dev,
-                               struct device_attribute *attr, char *buf)
+static ssize_t current_clocksource_show(struct device *dev,
+                                       struct device_attribute *attr,
+                                       char *buf)
 {
        ssize_t count = 0;
 
@@ -895,7 +895,7 @@ ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt)
 }
 
 /**
- * sysfs_override_clocksource - interface for manually overriding clocksource
+ * current_clocksource_store - interface for manually overriding clocksource
  * @dev:       unused
  * @attr:      unused
  * @buf:       name of override clocksource
@@ -904,9 +904,9 @@ ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt)
  * Takes input from sysfs interface for manually overriding the default
  * clocksource selection.
  */
-static ssize_t sysfs_override_clocksource(struct device *dev,
-                                         struct device_attribute *attr,
-                                         const char *buf, size_t count)
+static ssize_t current_clocksource_store(struct device *dev,
+                                        struct device_attribute *attr,
+                                        const char *buf, size_t count)
 {
        ssize_t ret;
 
@@ -920,9 +920,10 @@ static ssize_t sysfs_override_clocksource(struct device *dev,
 
        return ret;
 }
+static DEVICE_ATTR_RW(current_clocksource);
 
 /**
- * sysfs_unbind_current_clocksource - interface for manually unbinding clocksource
+ * unbind_clocksource_store - interface for manually unbinding clocksource
  * @dev:       unused
  * @attr:      unused
  * @buf:       unused
@@ -930,7 +931,7 @@ static ssize_t sysfs_override_clocksource(struct device *dev,
  *
  * Takes input from sysfs interface for manually unbinding a clocksource.
  */
-static ssize_t sysfs_unbind_clocksource(struct device *dev,
+static ssize_t unbind_clocksource_store(struct device *dev,
                                        struct device_attribute *attr,
                                        const char *buf, size_t count)
 {
@@ -954,19 +955,19 @@ static ssize_t sysfs_unbind_clocksource(struct device *dev,
 
        return ret ? ret : count;
 }
+static DEVICE_ATTR_WO(unbind_clocksource);
 
 /**
- * sysfs_show_available_clocksources - sysfs interface for listing clocksource
+ * available_clocksource_show - sysfs interface for listing clocksource
  * @dev:       unused
  * @attr:      unused
  * @buf:       char buffer to be filled with clocksource list
  *
  * Provides sysfs interface for listing registered clocksources
  */
-static ssize_t
-sysfs_show_available_clocksources(struct device *dev,
-                                 struct device_attribute *attr,
-                                 char *buf)
+static ssize_t available_clocksource_show(struct device *dev,
+                                         struct device_attribute *attr,
+                                         char *buf)
 {
        struct clocksource *src;
        ssize_t count = 0;
@@ -990,17 +991,7 @@ sysfs_show_available_clocksources(struct device *dev,
 
        return count;
 }
-
-/*
- * Sysfs setup bits:
- */
-static DEVICE_ATTR(current_clocksource, 0644, sysfs_show_current_clocksources,
-                  sysfs_override_clocksource);
-
-static DEVICE_ATTR(unbind_clocksource, 0200, NULL, sysfs_unbind_clocksource);
-
-static DEVICE_ATTR(available_clocksource, 0444,
-                  sysfs_show_available_clocksources, NULL);
+static DEVICE_ATTR_RO(available_clocksource);
 
 static struct bus_type clocksource_subsys = {
        .name = "clocksource",