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From: Christoph Lameter on 9 Jul 2010 15:20
If a slab cache is removed before we have setup sysfs then simply skip over
the sysfs handling.

Cc: Benjamin Herrenschmidt <benh(a)kernel.crashing.org>
Cc: Roland Dreier <rdreier(a)cisco.com>
Signed-off-by: Christoph Lameter <cl(a)linux-foundation.org>

---
mm/slub.c | 7 +++++++
1 file changed, 7 insertions(+)

Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c 2010-07-06 15:13:48.000000000 -0500
+++ linux-2.6/mm/slub.c 2010-07-06 15:15:27.000000000 -0500
@@ -4507,6 +4507,13 @@ static int sysfs_slab_add(struct kmem_ca

static void sysfs_slab_remove(struct kmem_cache *s)
{
+ if (slab_state < SYSFS)
+ /*
+ * Sysfs has not been setup yet so no need to remove the
+ * cache from sysfs.
+ */
+ return;
+
kobject_uevent(&s->kobj, KOBJ_REMOVE);
kobject_del(&s->kobj);
kobject_put(&s->kobj);

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Next: [S+Q2 08/19] slub: Use kmem_cache flags to detect if slab is in debugging mode.