Re: [PATCH] zram: Replace pr_* with dev_*

[Sergey Senozhatsky]

On (08/04/15 20:22), Salah Triki wrote:
> This patch replaces pr_info/pr_warn/pr_err with
> dev_info/dev_warn/dev_err.

Hi,

what's the benefit?

	-ss

> Signed-off-by: Salah Triki <salah.triki@xxxxxxx>
> ---
>  drivers/block/zram/zram_drv.c | 40 +++++++++++++++++++++++-----------------
>  1 file changed, 23 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
> index fb655e8..8eecb72 100644
> --- a/drivers/block/zram/zram_drv.c
> +++ b/drivers/block/zram/zram_drv.c
> @@ -333,7 +333,8 @@ static ssize_t max_comp_streams_store(struct device *dev,
>  	down_write(&zram->init_lock);
>  	if (init_done(zram)) {
>  		if (!zcomp_set_max_streams(zram->comp, num)) {
> -			pr_info("Cannot change max compression streams\n");
> +			dev_warn(dev, "Cannot change max compression streams to %d",
> +				num);
>  			ret = -EINVAL;
>  			goto out;
>  		}
> @@ -368,7 +369,7 @@ static ssize_t comp_algorithm_store(struct device *dev,
>  	down_write(&zram->init_lock);
>  	if (init_done(zram)) {
>  		up_write(&zram->init_lock);
> -		pr_info("Can't change algorithm for initialized device\n");
> +		dev_warn(dev, "Can't change algorithm for initialized device");
>  		return -EBUSY;
>  	}
>  	strlcpy(zram->compressor, buf, sizeof(zram->compressor));
> @@ -508,14 +509,15 @@ static struct zram_meta *zram_meta_alloc(int device_id, u64 disksize)
>  	num_pages = disksize >> PAGE_SHIFT;
>  	meta->table = vzalloc(num_pages * sizeof(*meta->table));
>  	if (!meta->table) {
> -		pr_err("Error allocating zram address table\n");
> +		dev_err("Error allocating zram address table for device %d",
> +			device_id);
>  		goto out_error;
>  	}
>  
>  	snprintf(pool_name, sizeof(pool_name), "zram%d", device_id);
>  	meta->mem_pool = zs_create_pool(pool_name, GFP_NOIO | __GFP_HIGHMEM);
>  	if (!meta->mem_pool) {
> -		pr_err("Error creating memory pool\n");
> +		dev_err("Error creating memory pool for device %d", device_id);
>  		goto out_error;
>  	}
>  
> @@ -587,7 +589,8 @@ static int zram_decompress_page(struct zram *zram, char *mem, u32 index)
>  
>  	/* Should NEVER happen. Return bio error if it does. */
>  	if (unlikely(ret)) {
> -		pr_err("Decompression failed! err=%d, page=%u\n", ret, index);
> +		dev_err(disk_to_dev(zram->disk), "Decompression failed! err=%d, page=%u",
> +			ret, index);
>  		return ret;
>  	}
>  
> @@ -621,7 +624,7 @@ static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec,
>  		uncmem = user_mem;
>  
>  	if (!uncmem) {
> -		pr_info("Unable to allocate temp memory\n");
> +		dev_warn("Unable to allocate temp memory");
>  		ret = -ENOMEM;
>  		goto out_cleanup;
>  	}
> @@ -706,7 +709,8 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index,
>  	}
>  
>  	if (unlikely(ret)) {
> -		pr_err("Compression failed! err=%d\n", ret);
> +		dev_err(disk_to_dev(zram->disk), "Compression failed! err=%d",
> +			ret);
>  		goto out;
>  	}
>  	src = zstrm->buffer;
> @@ -718,7 +722,7 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index,
>  
>  	handle = zs_malloc(meta->mem_pool, clen);
>  	if (!handle) {
> -		pr_info("Error allocating memory for compressed page: %u, size=%zu\n",
> +		dev_warn(dev, "Error allocating memory for compressed page: %u, size=%zu",
>  			index, clen);
>  		ret = -ENOMEM;
>  		goto out;
> @@ -1037,7 +1041,7 @@ static ssize_t disksize_store(struct device *dev,
>  
>  	comp = zcomp_create(zram->compressor, zram->max_comp_streams);
>  	if (IS_ERR(comp)) {
> -		pr_info("Cannot initialise %s compressing backend\n",
> +		dev_info(dev, "Cannot initialise %s compressing backend",
>  				zram->compressor);
>  		err = PTR_ERR(comp);
>  		goto out_free_meta;
> @@ -1045,7 +1049,7 @@ static ssize_t disksize_store(struct device *dev,
>  
>  	down_write(&zram->init_lock);
>  	if (init_done(zram)) {
> -		pr_info("Cannot change disksize for initialized device\n");
> +		dev_warn(dev, "Cannot change disksize for initialized device");
>  		err = -EBUSY;
>  		goto out_destroy_comp;
>  	}
> @@ -1204,7 +1208,7 @@ static int zram_add(void)
>  
>  	queue = blk_alloc_queue(GFP_KERNEL);
>  	if (!queue) {
> -		pr_err("Error allocating disk queue for device %d\n",
> +		dev_err("Error allocating disk queue for device %d",
>  			device_id);
>  		ret = -ENOMEM;
>  		goto out_free_idr;
> @@ -1215,7 +1219,7 @@ static int zram_add(void)
>  	/* gendisk structure */
>  	zram->disk = alloc_disk(1);
>  	if (!zram->disk) {
> -		pr_warn("Error allocating disk structure for device %d\n",
> +		dev_warn("Error allocating disk structure for device %d",
>  			device_id);
>  		ret = -ENOMEM;
>  		goto out_free_queue;
> @@ -1264,14 +1268,15 @@ static int zram_add(void)
>  	ret = sysfs_create_group(&disk_to_dev(zram->disk)->kobj,
>  				&zram_disk_attr_group);
>  	if (ret < 0) {
> -		pr_warn("Error creating sysfs group");
> +		dev_warn(disk_to_dev(zram->disk), "Error creating sysfs group");
>  		goto out_free_disk;
>  	}
>  	strlcpy(zram->compressor, default_compressor, sizeof(zram->compressor));
>  	zram->meta = NULL;
>  	zram->max_comp_streams = 1;
>  
> -	pr_info("Added device: %s\n", zram->disk->disk_name);
> +	dev_info(disk_to_dev(zram->disk), "Added device: %s",
> +		zram->disk->disk_name);
>  	return device_id;
>  
>  out_free_disk:
> @@ -1319,7 +1324,8 @@ static int zram_remove(struct zram *zram)
>  	zram_reset_device(zram);
>  	bdput(bdev);
>  
> -	pr_info("Removed device: %s\n", zram->disk->disk_name);
> +	dev_info(disk_to_dev(zram->disk), "Removed device: %s",
> +		zram->disk->disk_name);
>  
>  	idr_remove(&zram_index_idr, zram->disk->first_minor);
>  	blk_cleanup_queue(zram->disk->queue);
> @@ -1404,13 +1410,13 @@ static int __init zram_init(void)
>  
>  	ret = class_register(&zram_control_class);
>  	if (ret) {
> -		pr_warn("Unable to register zram-control class\n");
> +		dev_warn("Unable to register zram-control class");
>  		return ret;
>  	}
>  
>  	zram_major = register_blkdev(0, "zram");
>  	if (zram_major <= 0) {
> -		pr_warn("Unable to get major number\n");
> +		dev_warn("Unable to get major number");
>  		class_unregister(&zram_control_class);
>  		return -EBUSY;
>  	}
> -- 
> 1.9.1
> 
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