kset: move /sys/slab to /sys/kernel/slab

/sys/kernel is where these things should go.
Also updated the documentation and tool that used this directory.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/Documentation/vm/slabinfo.c b/Documentation/vm/slabinfo.c
index 7047696..488c1f3 100644
--- a/Documentation/vm/slabinfo.c
+++ b/Documentation/vm/slabinfo.c
@@ -1021,7 +1021,7 @@
 	char *t;
 	int count;
 
-	if (chdir("/sys/slab"))
+	if (chdir("/sys/kernel/slab"))
 		fatal("SYSFS support for SLUB not active\n");
 
 	dir = opendir(".");
diff --git a/Documentation/vm/slub.txt b/Documentation/vm/slub.txt
index d17f324..dcf8bcf 100644
--- a/Documentation/vm/slub.txt
+++ b/Documentation/vm/slub.txt
@@ -63,7 +63,7 @@
 possible to enable debugging manually when the kernel is up. Look at the
 contents of:
 
-/sys/slab/<slab name>/
+/sys/kernel/slab/<slab name>/
 
 Look at the writable files. Writing 1 to them will enable the
 corresponding debug option. All options can be set on a slab that does
diff --git a/mm/slub.c b/mm/slub.c
index 886131c..b6c7946 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4091,7 +4091,8 @@
 	struct kmem_cache *s;
 	int err;
 
-	slab_kset = kset_create_and_add("slab", &slab_uevent_ops, NULL);
+	slab_kset = kset_create_and_add("slab", &slab_uevent_ops,
+					&kernel_kset->kobj);
 	if (!slab_kset) {
 		printk(KERN_ERR "Cannot register slab subsystem.\n");
 		return -ENOSYS;