On Wed, 20 Jun 2018 11:44:13 +0900
Linus Torvalds [off-list ref] wrote:

On Wed, Jun 20, 2018 at 11:34 AM Steven Rostedt [off-list ref] wrote:

quoted

Perhaps we should do an audit of the console drivers and remove all
printk, pr_* , WARN*, BUG* from them.  

Only the actual _printing_ parts.

No because they are normally rather useful because that port isn't the
console. If you trylock it as I suggested then at least you'd just drop
the recursive cases and get messages otherwise.

Really that's all that you need - log the message to whichever console
targets you can currently safely do so. If it's none well there was
always the proposed morse code keyboard light driver 8)

Alan