[PATCH 3/3] clocksource: Use ATTRIBUTE_GROUPS macro

[Baolin Wang]

Convert to use ATTRIBUTE_GROUPS to define one attribute group pointed by
'groups' of the device, which can avoid issuing device_create_file() many
times.

Signed-off-by: Baolin Wang <baolin.w...@linaro.org>
---
 kernel/time/clocksource.c |   21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 7ce5346..0e974cf 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -993,6 +993,14 @@ static ssize_t available_clocksource_show(struct device 
*dev,
 }
 static DEVICE_ATTR_RO(available_clocksource);
 
+static struct attribute *clocksource_attrs[] = {
+       &dev_attr_current_clocksource.attr,
+       &dev_attr_unbind_clocksource.attr,
+       &dev_attr_available_clocksource.attr,
+       NULL
+};
+ATTRIBUTE_GROUPS(clocksource);
+
 static struct bus_type clocksource_subsys = {
        .name = "clocksource",
        .dev_name = "clocksource",
@@ -1001,6 +1009,7 @@ static ssize_t available_clocksource_show(struct device 
*dev,
 static struct device device_clocksource = {
        .id     = 0,
        .bus    = &clocksource_subsys,
+       .groups = clocksource_groups,
 };
 
 static int __init init_clocksource_sysfs(void)
@@ -1009,17 +1018,7 @@ static int __init init_clocksource_sysfs(void)
 
        if (!error)
                error = device_register(&device_clocksource);
-       if (!error)
-               error = device_create_file(
-                               &device_clocksource,
-                               &dev_attr_current_clocksource);
-       if (!error)
-               error = device_create_file(&device_clocksource,
-                                          &dev_attr_unbind_clocksource);
-       if (!error)
-               error = device_create_file(
-                               &device_clocksource,
-                               &dev_attr_available_clocksource);
+
        return error;
 }
 
-- 
1.7.9.5