@@ -691,49 +691,23 @@ struct go7007 *go7007_alloc(const struct go7007_board_info *board,
struct device *dev)
{
struct go7007 *go;
- int i;
go = kzalloc(sizeof(struct go7007), GFP_KERNEL);
if (go == NULL)
return NULL;
go->dev = dev;
go->board_info = board;
- go->board_id = 0;
go->tuner_type = -1;
- go->channel_number = 0;
- go->name[0] = 0;
mutex_init(&go->hw_lock);
init_waitqueue_head(&go->frame_waitq);
spin_lock_init(&go->spinlock);
go->status = STATUS_INIT;
- memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
- go->i2c_adapter_online = 0;
- go->interrupt_available = 0;
init_waitqueue_head(&go->interrupt_waitq);
- go->input = 0;
go7007_update_board(go);
- go->encoder_h_halve = 0;
- go->encoder_v_halve = 0;
- go->encoder_subsample = 0;
go->format = V4L2_PIX_FMT_MJPEG;
go->bitrate = 1500000;
go->fps_scale = 1;
- go->pali = 0;
go->aspect_ratio = GO7007_RATIO_1_1;
- go->gop_size = 0;
- go->ipb = 0;
- go->closed_gop = 0;
- go->repeat_seqhead = 0;
- go->seq_header_enable = 0;
- go->gop_header_enable = 0;
- go->dvd_mode = 0;
- go->interlace_coding = 0;
- for (i = 0; i < 4; ++i)
- go->modet[i].enable = 0;
- for (i = 0; i < 1624; ++i)
- go->modet_map[i] = 0;
- go->audio_deliver = NULL;
- go->audio_enabled = 0;
return go;
}
In go7007_alloc() kzalloc() is used for struct go7007 allocation. It means that there is no need in zeroing any members, because kzalloc will take care of it. Removing these reduntant initialization steps increases execution speed a lot: Before: + 86.802 us | go7007_alloc(); After: + 29.595 us | go7007_alloc(); Fixes: 866b8695d67e8 ("Staging: add the go7007 video driver") Signed-off-by: Pavel Skripkin <paskripkin@gmail.com> --- drivers/media/usb/go7007/go7007-driver.c | 26 ------------------------ 1 file changed, 26 deletions(-)