Driver core: implement uevent suppress in kobject

This patch implements uevent suppress in kobject and removes it
from struct device, based on the following ideas:

1,Uevent sending should be one attribute of kobject, so suppressing it
in kobject layer is more natural than in device layer. By this way,
we can do it for other objects embedded with kobject.

2,It may save several bytes for each instance of struct device.(On my
omap3(32bit ARM) based box, can save 8bytes per device object)

This patch also introduces dev_set|get_uevent_suppress() helpers to
set and query uevent_suppress attribute in case to help kobject
as private part of struct device in future.

[This version is against the latest driver-core patch set of Greg,please
ignore the last version.]

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 11 insertions, 1 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index 4bea53fe8f4c..914c1016dd8f 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -373,7 +373,6 @@ struct device {
         struct device_private   *p;
 
         struct kobject kobj;
-        unsigned                uevent_suppress:1;
         const char              *init_name; /* initial name of the device */
         struct device_type      *type;
 
@@ -465,6 +464,16 @@ static inline void dev_set_drvdata(struct device *dev, void *data)
         dev->driver_data = data;
 }
 
+static inline unsigned int dev_get_uevent_suppress(const struct device *dev)
+{
+        return dev->kobj.uevent_suppress;
+}
+
+static inline void dev_set_uevent_suppress(struct device *dev, int val)
+{
+        dev->kobj.uevent_suppress = val;
+}
+
 static inline int device_is_registered(struct device *dev)
 {
         return dev->kobj.state_in_sysfs;
diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index c9c214d7bba2..58ae8e00fcdd 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -68,6 +68,7 @@ struct kobject {
         unsigned int state_in_sysfs:1;
         unsigned int state_add_uevent_sent:1;
         unsigned int state_remove_uevent_sent:1;
+        unsigned int uevent_suppress:1;
 };
 
 extern int kobject_set_name(struct kobject *kobj, const char *name, ...)