diff options
Diffstat (limited to 'drivers/mtd/ubi/build.c')
| -rw-r--r-- | drivers/mtd/ubi/build.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c index 5490a73deca..44c852144a9 100644 --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -67,6 +67,9 @@ struct ubi_device *ubi_devices[UBI_MAX_DEVICES]; /* Root UBI "class" object (corresponds to '/<sysfs>/class/ubi/') */ struct class *ubi_class; +/* Slab cache for lock-tree entries */ +struct kmem_cache *ubi_ltree_slab; + /* "Show" method for files in '/<sysfs>/class/ubi/' */ static ssize_t ubi_version_show(struct class *class, char *buf) { @@ -687,6 +690,20 @@ static void detach_mtd_dev(struct ubi_device *ubi) ubi_msg("mtd%d is detached from ubi%d", mtd_num, ubi_num); } +/** + * ltree_entry_ctor - lock tree entries slab cache constructor. + * @obj: the lock-tree entry to construct + * @cache: the lock tree entry slab cache + * @flags: constructor flags + */ +static void ltree_entry_ctor(struct kmem_cache *cache, void *obj) +{ + struct ubi_ltree_entry *le = obj; + + le->users = 0; + init_rwsem(&le->mutex); +} + static int __init ubi_init(void) { int err, i, k; @@ -709,6 +726,12 @@ static int __init ubi_init(void) if (err) goto out_class; + ubi_ltree_slab = kmem_cache_create("ubi_ltree_slab", + sizeof(struct ubi_ltree_entry), 0, + 0, <ree_entry_ctor); + if (!ubi_ltree_slab) + goto out_version; + /* Attach MTD devices */ for (i = 0; i < mtd_devs; i++) { struct mtd_dev_param *p = &mtd_dev_param[i]; @@ -724,6 +747,8 @@ static int __init ubi_init(void) out_detach: for (k = 0; k < i; k++) detach_mtd_dev(ubi_devices[k]); + kmem_cache_destroy(ubi_ltree_slab); +out_version: class_remove_file(ubi_class, &ubi_version); out_class: class_destroy(ubi_class); @@ -737,6 +762,7 @@ static void __exit ubi_exit(void) for (i = 0; i < n; i++) detach_mtd_dev(ubi_devices[i]); + kmem_cache_destroy(ubi_ltree_slab); class_remove_file(ubi_class, &ubi_version); class_destroy(ubi_class); } |