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Commit 46288030 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

kobject core: remove rwsem from struct subsystem 



It isn't used at all by the driver core anymore, and the few usages of
it within the kernel have now all been fixed as most of them were using
it incorrectly.  So remove it.

Now the whole struct subsys can be removed from the system, but that's
for a later patch...

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 2f66858a

include/linux/kobject.h

+0 −2
Original line number Diff line number Diff line
@@ -22,7 +22,6 @@ 
#include <linux/sysfs.h>

#include <linux/compiler.h>

#include <linux/spinlock.h>

#include <linux/rwsem.h>

#include <linux/kref.h>

#include <linux/kernel.h>

#include <linux/wait.h>
@@ -177,7 +176,6 @@ extern struct kobject * kset_find_obj(struct kset *, const char *); 


struct subsystem {

	struct kset		kset;

	struct rw_semaphore	rwsem;

};



#define decl_subsys(_name,_type,_uevent_ops) \

lib/kobject.c

+1 −3
Original line number Diff line number Diff line
@@ -652,7 +652,6 @@ struct kobject * kset_find_obj(struct kset * kset, const char * name) 


void subsystem_init(struct subsystem * s)

{

	init_rwsem(&s->rwsem);

	kset_init(&s->kset);

}
@@ -661,8 +660,7 @@ void subsystem_init(struct subsystem * s) 
 *	@s:	the subsystem we're registering.

 *

 *	Once we register the subsystem, we want to make sure that 

 *	the kset points back to this subsystem for correct usage of 

 *	the rwsem. 

 *	the kset points back to this subsystem.

 */



int subsystem_register(struct subsystem * s)