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[PATCH] Driver core: add generic "subsystem" link to all devices

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Like the SUBSYTEM= key we find in the environment of the uevent, this
creates a generic "subsystem" link in sysfs for every device. Userspace
usually doesn't care at all if its a "class" or a "bus" device. This
provides an unified way to determine the subsytem of a device, regardless
of the way the driver core has created it.

Signed-off-by: Kay Sievers <kay.sievers@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers
2006-06-15 15:31:56 +02:00
committed by Greg Kroah-Hartman
parent 23681e4791
commit b9d9c82b4d
5 changed files with 17 additions and 7 deletions
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7
block/genhd.c
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@@ -17,8 +17,7 @@
#include <linux/buffer_head.h>
#include <linux/mutex.h>
static struct subsystem block_subsys;
struct subsystem block_subsys;
static DEFINE_MUTEX(block_subsys_lock);
/*
@@ -511,9 +510,7 @@ static struct kset_uevent_ops block_uevent_ops = {
.uevent = block_uevent,
};
/* declare block_subsys. */
static decl_subsys(block, &ktype_block, &block_uevent_ops);
decl_subsys(block, &ktype_block, &block_uevent_ops);
/*
* aggregate disk stat collector. Uses the same stats that the sysfs