[PATCH 1/6] sysfs.h: add __ATTR_RW() macro

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

A number of parts of the kernel created their own version of this, might
as well have the sysfs core provide it instead.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/linux/sysfs.h | 2 ++
 kernel/events/core.c  | 2 --
 mm/backing-dev.c      | 2 --
 3 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index e2cee22..9cd20c8 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -79,6 +79,8 @@ struct attribute_group {
 	.show	= _name##_show,					\
 }
 
+#define __ATTR_RW(_name) __ATTR(_name, 0644, _name##_show, _name##_store)
+
 #define __ATTR_NULL { .attr = { .name = NULL } }
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 1db3af9..45a21ae 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6212,8 +6212,6 @@ perf_event_mux_interval_ms_store(struct device *dev,
 	return count;
 }
 
-#define __ATTR_RW(attr) __ATTR(attr, 0644, attr##_show, attr##_store)
-
 static struct device_attribute pmu_dev_attrs[] = {
 	__ATTR_RO(type),
 	__ATTR_RW(perf_event_mux_interval_ms),
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index d014ee5..e04454c 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -232,8 +232,6 @@ static ssize_t stable_pages_required_show(struct device *dev,
 			bdi_cap_stable_pages_required(bdi) ? 1 : 0);
 }
 
-#define __ATTR_RW(attr) __ATTR(attr, 0644, attr##_show, attr##_store)
-
 static struct device_attribute bdi_dev_attrs[] = {
 	__ATTR_RW(read_ahead_kb),
 	__ATTR_RW(min_ratio),
-- 
1.8.3.rc0.20.gb99dd2e