Re: [PATCH 3/4] printk/btrfs: Handle more message headers

[Joe Perches]

On Thu, 2016-10-27 at 17:52 +0200, Petr Mladek wrote:
> Note that 3 bytes should be enough for the header buffer. I am not
> sure where the 4 bytes came from. Maybe it expected that both
> KERN_SOH and the log level strings end with '\0' but they
> are concatenated.

I believe it was from when KERN_<LEVEL> was ascii "<[0-7]>"
and not KERN_SOH "[0-7]".  I just didn't change the size.

see: commit e2aed8dfa50b ("btrfs: use printk_get_level and printk_skip_level, add __printf, fix fallout")