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

Sergey Senozhatsky
2017-08-30T01:01:27Z

Hello,

On (08/29/17 19:50), Steven Rostedt wrote:
[..]
> > A private buffer has none of those issues.
>
> What about using the seq_buf*() then?
>
> struct seq_buf s;
>
> buf = kmalloc(mysize);
> seq_buf_init(&s, buf, mysize);
>
> seq_printf(&s,"blah blah %d", bah_blah);
> [...]
> seq_printf(&s, "my last print\n");
>
> printk("%.*s", s.len, s.buffer);
>
> kfree(buf);

could do. for a single continuation line printk("%.*s", s.len, s.buffer)
this will work perfectly fine. for a more general case - backtraces, dumps,
etc. - this requires some tweaks.

-ss