Re: printk: what is going on with additional newlines?

Joe Perches
2017-09-18T02:22:35Z

On Mon, 2017-09-18 at 09:46 +0900, Sergey Senozhatsky wrote:
> there is another reason why I think that, yes, we probably better do
> it some other way. and the reason is that not every message that looks
> like !PREFIX (does not start with KERN_SOH_ASCII) is _actually_ a
> !PREFIX message. the normal/usual way is to have something like
>
> printk(KERN_SOH_ASCII %d " foo bar / %s %s\n", "foo", "bar");
>
> but some messages look like
>
> printk("%s", KERN_SOH_ASCII %d "foo bar\n");

There are no messages that look like that.

There are 2 entries somewhat like that though

net/bridge/netfilter/ebt_log.c: printk(KERN_SOH "%c%s IN=%s OUT=%s MAC source = %pM MAC dest = %pM proto = 0x%04x",
net/netfilter/nf_log_common.c:  nf_log_buf_add(m, KERN_SOH "%c%sIN=%s OUT=%s ",