kobject_add failed for psmouse with -EEXIST, don't try to register things with the same name in the same directory.
 [<c0104419>] dump_trace+0x69/0x1af
 [<c0104577>] show_trace_log_lvl+0x18/0x2c
 [<c0104b50>] show_trace+0xf/0x11
 [<c0104c53>] dump_stack+0x15/0x17
 [<c02a19f7>] kobject_add+0x162/0x18b
 [<c02a1aea>] kobject_register+0x19/0x30
 [<c0133705>] sys_init_module+0x1397/0x1829
 [<c0103603>] syscall_call+0x7/0xb
 [<b7ea1dfe>] 0xb7ea1dfe
 =======================