Revert "mm/sl[aou]b: Move sysfs_slab_add to common"
This reverts commit 96d17b7be0a9849d381442030886211dbb2a7061 which
caused the following errors at boot:
[ 1.114885] kobject (ffff88001a802578): tried to init an initialized object, something is seriously wrong.
[ 1.114885] Pid: 1, comm: swapper/0 Tainted: G W 3.6.0-rc1+ #6
[ 1.114885] Call Trace:
[ 1.114885] [<ffffffff81273f37>] kobject_init+0x87/0xa0
[ 1.115555] [<ffffffff8127426a>] kobject_init_and_add+0x2a/0x90
[ 1.115555] [<ffffffff8127c870>] ? sprintf+0x40/0x50
[ 1.115555] [<ffffffff81124c60>] sysfs_slab_add+0x80/0x210
[ 1.115555] [<ffffffff81100175>] kmem_cache_create+0xa5/0x250
[ 1.115555] [<ffffffff81cf24cd>] ? md_init+0x144/0x144
[ 1.115555] [<ffffffff81cf25b6>] local_init+0xa4/0x11b
[ 1.115555] [<ffffffff81cf24e1>] dm_init+0x14/0x45
[ 1.115836] [<ffffffff810001ba>] do_one_initcall+0x3a/0x160
[ 1.116834] [<ffffffff81cc2c90>] kernel_init+0x133/0x1b7
[ 1.117835] [<ffffffff81cc25c4>] ? do_early_param+0x86/0x86
[ 1.117835] [<ffffffff8171aff4>] kernel_thread_helper+0x4/0x10
[ 1.118401] [<ffffffff81cc2b5d>] ? start_kernel+0x33f/0x33f
[ 1.119832] [<ffffffff8171aff0>] ? gs_change+0xb/0xb
[ 1.120325] ------------[ cut here ]------------
[ 1.120835] WARNING: at fs/sysfs/dir.c:536 sysfs_add_one+0xc1/0xf0()
[ 1.121437] sysfs: cannot create duplicate filename '/kernel/slab/:t-0000016'
[ 1.121831] Modules linked in:
[ 1.122138] Pid: 1, comm: swapper/0 Tainted: G W 3.6.0-rc1+ #6
[ 1.122831] Call Trace:
[ 1.123074] [<ffffffff81195ce1>] ? sysfs_add_one+0xc1/0xf0
[ 1.123833] [<ffffffff8103adfa>] warn_slowpath_common+0x7a/0xb0
[ 1.124405] [<ffffffff8103aed1>] warn_slowpath_fmt+0x41/0x50
[ 1.124832] [<ffffffff81195ce1>] sysfs_add_one+0xc1/0xf0
[ 1.125337] [<ffffffff81195eb3>] create_dir+0x73/0xd0
[ 1.125832] [<ffffffff81196221>] sysfs_create_dir+0x81/0xe0
[ 1.126363] [<ffffffff81273d3d>] kobject_add_internal+0x9d/0x210
[ 1.126832] [<ffffffff812742a3>] kobject_init_and_add+0x63/0x90
[ 1.127406] [<ffffffff81124c60>] sysfs_slab_add+0x80/0x210
[ 1.127832] [<ffffffff81100175>] kmem_cache_create+0xa5/0x250
[ 1.128384] [<ffffffff81cf24cd>] ? md_init+0x144/0x144
[ 1.128833] [<ffffffff81cf25b6>] local_init+0xa4/0x11b
[ 1.129831] [<ffffffff81cf24e1>] dm_init+0x14/0x45
[ 1.130305] [<ffffffff810001ba>] do_one_initcall+0x3a/0x160
[ 1.130831] [<ffffffff81cc2c90>] kernel_init+0x133/0x1b7
[ 1.131351] [<ffffffff81cc25c4>] ? do_early_param+0x86/0x86
[ 1.131830] [<ffffffff8171aff4>] kernel_thread_helper+0x4/0x10
[ 1.132392] [<ffffffff81cc2b5d>] ? start_kernel+0x33f/0x33f
[ 1.132830] [<ffffffff8171aff0>] ? gs_change+0xb/0xb
[ 1.133315] ---[ end trace 2703540871c8fab7 ]---
[ 1.133830] ------------[ cut here ]------------
[ 1.134274] WARNING: at lib/kobject.c:196 kobject_add_internal+0x1f5/0x210()
[ 1.134829] kobject_add_internal failed for :t-0000016 with -EEXIST, don't try to register things with the same name in the same directory.
[ 1.135829] Modules linked in:
[ 1.136135] Pid: 1, comm: swapper/0 Tainted: G W 3.6.0-rc1+ #6
[ 1.136828] Call Trace:
[ 1.137071] [<ffffffff81273e95>] ? kobject_add_internal+0x1f5/0x210
[ 1.137830] [<ffffffff8103adfa>] warn_slowpath_common+0x7a/0xb0
[ 1.138402] [<ffffffff8103aed1>] warn_slowpath_fmt+0x41/0x50
[ 1.138830] [<ffffffff811955a3>] ? release_sysfs_dirent+0x73/0xf0
[ 1.139419] [<ffffffff81273e95>] kobject_add_internal+0x1f5/0x210
[ 1.139830] [<ffffffff812742a3>] kobject_init_and_add+0x63/0x90
[ 1.140429] [<ffffffff81124c60>] sysfs_slab_add+0x80/0x210
[ 1.140830] [<ffffffff81100175>] kmem_cache_create+0xa5/0x250
[ 1.141829] [<ffffffff81cf24cd>] ? md_init+0x144/0x144
[ 1.142307] [<ffffffff81cf25b6>] local_init+0xa4/0x11b
[ 1.142829] [<ffffffff81cf24e1>] dm_init+0x14/0x45
[ 1.143307] [<ffffffff810001ba>] do_one_initcall+0x3a/0x160
[ 1.143829] [<ffffffff81cc2c90>] kernel_init+0x133/0x1b7
[ 1.144352] [<ffffffff81cc25c4>] ? do_early_param+0x86/0x86
[ 1.144829] [<ffffffff8171aff4>] kernel_thread_helper+0x4/0x10
[ 1.145405] [<ffffffff81cc2b5d>] ? start_kernel+0x33f/0x33f
[ 1.145828] [<ffffffff8171aff0>] ? gs_change+0xb/0xb
[ 1.146313] ---[ end trace 2703540871c8fab8 ]---
Conflicts:
mm/slub.c
Signed-off-by: Pekka Enberg <penberg@kernel.org>
diff --git a/mm/slab.h b/mm/slab.h
index 67aeaa2..7deeb44 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -38,13 +38,10 @@
#ifdef CONFIG_SLUB
struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
size_t align, unsigned long flags, void (*ctor)(void *));
-extern int sysfs_slab_add(struct kmem_cache *s);
#else
static inline struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
size_t align, unsigned long flags, void (*ctor)(void *))
{ return NULL; }
-static inline int sysfs_slab_add(struct kmem_cache *s) { return 0; }
-
#endif
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 651a3c6..9c21725 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -155,14 +155,6 @@
return NULL;
}
- if (s->refcount == 1) {
- err = sysfs_slab_add(s);
- if (err)
- printk(KERN_WARNING "kmem_cache_create(%s) failed to"
- " create sysfs entry. Error %d\n",
- name, err);
- }
-
return s;
}
EXPORT_SYMBOL(kmem_cache_create);
diff --git a/mm/slub.c b/mm/slub.c
index 0b122d8..dafd465 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -202,10 +202,12 @@
enum track_item { TRACK_ALLOC, TRACK_FREE };
#ifdef CONFIG_SYSFS
+static int sysfs_slab_add(struct kmem_cache *);
static int sysfs_slab_alias(struct kmem_cache *, const char *);
static void sysfs_slab_remove(struct kmem_cache *);
#else
+static inline int sysfs_slab_add(struct kmem_cache *s) { return 0; }
static inline int sysfs_slab_alias(struct kmem_cache *s, const char *p)
{ return 0; }
static inline void sysfs_slab_remove(struct kmem_cache *s) { }
@@ -3943,7 +3945,20 @@
int __kmem_cache_create(struct kmem_cache *s, unsigned long flags)
{
- return kmem_cache_open(s, flags);
+ int err;
+
+ err = kmem_cache_open(s, flags);
+ if (err)
+ return err;
+
+ mutex_unlock(&slab_mutex);
+ err = sysfs_slab_add(s);
+ mutex_lock(&slab_mutex);
+
+ if (err)
+ kmem_cache_close(s);
+
+ return err;
}
#ifdef CONFIG_SMP
@@ -5233,7 +5248,7 @@
return name;
}
-int sysfs_slab_add(struct kmem_cache *s)
+static int sysfs_slab_add(struct kmem_cache *s)
{
int err;
const char *name;