This patches dm-log.c. In dm-register-dirty-log-type, I didn't seem any reason for the try_module_get to be within locked region of code. So I moved it. I also added the error return case, in the event try_module_get() fails. I added THIS_MODULE intializers to the _core_type and _disk_type declarations. This isn't strictly necessary, but I think is good for consistency. I reordered the __init declaration in dm_dirty_log_init() I removed dm_dirty_log_init and dm_dirty_log_exit() from the EXPORT_SYMBOL() list. diff -ur linux-2.6.6-rc2-udm1-original/drivers/md/dm-log.c linux-2.6.6-rc2-udm1-patched/drivers/md/dm-log.c --- linux-2.6.6-rc2-udm1-original/drivers/md/dm-log.c 2004-04-28 11:41:52.000000000 -0700 +++ linux-2.6.6-rc2-udm1-patched/drivers/md/dm-log.c 2004-04-28 20:15:59.000000000 -0700 @@ -17,10 +17,11 @@ int dm_register_dirty_log_type(struct dirty_log_type *type) { + if (!try_module_get(type->module)) + return -EINVAL; + spin_lock(&_lock); type->use_count = 0; - try_module_get(type->module); - list_add(&type->list, &_log_types); spin_unlock(&_lock); @@ -567,6 +568,7 @@ static struct dirty_log_type _core_type = { .name = "core", + .module = THIS_MODULE, .ctr = core_ctr, .dtr = core_dtr, .get_region_size = core_get_region_size, @@ -582,6 +584,7 @@ static struct dirty_log_type _disk_type = { .name = "disk", + .module = THIS_MODULE, .ctr = disk_ctr, .dtr = disk_dtr, .suspend = disk_flush, @@ -597,7 +600,7 @@ .get_sync_count = core_get_sync_count }; -__init int dm_dirty_log_init(void) +int __init dm_dirty_log_init(void) { int r; @@ -622,7 +625,5 @@ EXPORT_SYMBOL(dm_register_dirty_log_type); EXPORT_SYMBOL(dm_unregister_dirty_log_type); -EXPORT_SYMBOL(dm_dirty_log_init); -EXPORT_SYMBOL(dm_dirty_log_exit); EXPORT_SYMBOL(dm_create_dirty_log); EXPORT_SYMBOL(dm_destroy_dirty_log);