Review: do not hold dm_reg_lock spinlock when calling dm_add_fsys_entry()

Index: linux/fs/dmapi/dmapi_register.c
===================================================================
@@ -252,6 +252,7 @@ dm_add_fsys_entry(
 		fsrp->fr_next = dm_registers;
 		dm_registers = fsrp;
 		dm_fsys_cnt++;
+		mutex_spinunlock(&dm_reg_lock, lc);
 #ifdef CONFIG_PROC_FS
 		{
 		char buf[100];

@@ -262,7 +263,6 @@ dm_add_fsys_entry(
 		entry->owner = THIS_MODULE;
 		}
 #endif
-		mutex_spinunlock(&dm_reg_lock, lc);
 		return(0);
 	}