Re: [RFC][PATCH] printk: Add option to append kernel version to the dict

[Sergey Senozhatsky]

Hello,

On (05/13/16 13:58), Calvin Owens wrote:
[..]
> +#if defined(CONFIG_PRINTK_APPEND_UNAME)
> +static ssize_t msg_print_ext_uname(char *buf, size_t size)
> +{
> +	return scnprintf(buf, size, " UNAME=%s\n", init_utsname()->release);
> +}
> +#else
> +static ssize_t msg_print_ext_uname(char *buf, size_t size)
> +{
> +	return 0;
> +}
> +#endif
> +
>  /* /dev/kmsg - userspace message inject/listen interface */
>  struct devkmsg_user {
>  	u64 seq;
> @@ -2305,6 +2317,8 @@ skip:
>  						sizeof(ext_text) - ext_len,
>  						log_dict(msg), msg->dict_len,
>  						log_text(msg), msg->text_len);
> +			ext_len += msg_print_ext_uname(ext_text + ext_len,
> +						sizeof(ext_text) - ext_len);
>  		}

what if there is no place left for init_utsname() after msg_print_ext_header() + msg_print_ext_body()?
do you need init_utsname in every message? or just in WARN/ERR ones?

	-ss