untested
---
drivers/md/dm-log.c | 16 ++++------------
1 files changed, 4 insertions(+), 12 deletions(-)
Index: linux-2.6.28-rc9/drivers/md/dm-log.c
===================================================================
--- linux-2.6.28-rc9.orig/drivers/md/dm-log.c 2008-12-22 18:28:06.000000000 +0000
+++ linux-2.6.28-rc9/drivers/md/dm-log.c 2008-12-22 20:18:20.000000000 +0000
@@ -20,7 +20,6 @@ struct dm_dirty_log_internal {
struct dm_dirty_log_type *type;
struct list_head list;
- long use;
};
static LIST_HEAD(_log_types);
@@ -44,12 +43,8 @@ static struct dm_dirty_log_internal *_ge
spin_lock(&_lock);
log_type = __find_dirty_log_type(name);
- if (log_type) {
- if (!log_type->use && !try_module_get(log_type->type->module))
- log_type = NULL;
- else
- log_type->use++;
- }
+ if (log_type && !try_module_get(log_type->type->module))
+ log_type = NULL;
spin_unlock(&_lock);
@@ -120,10 +115,7 @@ static void put_type(struct dm_dirty_log
if (!log_type)
goto out;
- if (!--log_type->use)
- module_put(type->module);
-
- BUG_ON(log_type->use < 0);
+ module_put(type->module);
out:
spin_unlock(&_lock);
@@ -173,7 +165,7 @@ int dm_dirty_log_type_unregister(struct
return -EINVAL;
}
- if (log_type->use) {
+ if (type->module && module_refcount(type->module)) {
spin_unlock(&_lock);
return -ETXTBSY;
}