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authorChristoph Lameter <cl@linux.com>2020-06-01 21:45:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-02 10:59:06 -0700
commitd7660ce5914d396242bfc56c8f45ef117101fb58 (patch)
tree22ee5b95973815e7b8603c1d2356580fb7fcee69 /mm/slub.c
parent52f23478081ae0dcdb95d1650ea1e7d52d586829 (diff)
downloadlinux-d7660ce5914d396242bfc56c8f45ef117101fb58.tar.bz2
slub: Remove userspace notifier for cache add/remove
I came across some unnecessary uevents once again which reminded me this. The patch seems to be lost in the leaves of the original discussion [1], so resending. [1] https://lore.kernel.org/r/alpine.DEB.2.21.2001281813130.745@www.lameter.com Kmem caches are internal kernel structures so it is strange that userspace notifiers would be needed. And I am not aware of any use of these notifiers. These notifiers may just exist because in the initial slub release the sysfs code was copied from another subsystem. Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Michal Koutný <mkoutny@suse.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Link: http://lkml.kernel.org/r/20200423115721.19821-1-mkoutny@suse.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slub.c')
-rw-r--r--mm/slub.c17
1 files changed, 1 insertions, 16 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 6972c27ae394..2ae5580433af 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -5715,19 +5715,6 @@ static struct kobj_type slab_ktype = {
.release = kmem_cache_release,
};
-static int uevent_filter(struct kset *kset, struct kobject *kobj)
-{
- struct kobj_type *ktype = get_ktype(kobj);
-
- if (ktype == &slab_ktype)
- return 1;
- return 0;
-}
-
-static const struct kset_uevent_ops slab_uevent_ops = {
- .filter = uevent_filter,
-};
-
static struct kset *slab_kset;
static inline struct kset *cache_kset(struct kmem_cache *s)
@@ -5795,7 +5782,6 @@ static void sysfs_slab_remove_workfn(struct work_struct *work)
#ifdef CONFIG_MEMCG
kset_unregister(s->memcg_kset);
#endif
- kobject_uevent(&s->kobj, KOBJ_REMOVE);
out:
kobject_put(&s->kobj);
}
@@ -5853,7 +5839,6 @@ static int sysfs_slab_add(struct kmem_cache *s)
}
#endif
- kobject_uevent(&s->kobj, KOBJ_ADD);
if (!unmergeable) {
/* Setup first alias */
sysfs_slab_alias(s, s->name);
@@ -5934,7 +5919,7 @@ static int __init slab_sysfs_init(void)
mutex_lock(&slab_mutex);
- slab_kset = kset_create_and_add("slab", &slab_uevent_ops, kernel_kobj);
+ slab_kset = kset_create_and_add("slab", NULL, kernel_kobj);
if (!slab_kset) {
mutex_unlock(&slab_mutex);
pr_err("Cannot register slab subsystem.\n");