On Thu, 2020-09-24 at 12:28 +0200, Peter Zijlstra wrote: > On Mon, Sep 21, 2020 at 06:22:12PM +0200, Daniel Bristot de Oliveira wrote: > > While testing hotplug I got this BUG: > > It was caused by printk() inside a code section protected by a > > raw_spin_lock() that ended up calling a serial console that > > uses a regular spin_lock(). > > > > Use the printk_deferred() to avoid calling the serial console > > in a raw_spin_lock() protected section. > > I consider printk_deferred() to be a bug, can't we just wait for the new > printk implementation to land so we don't need all this nonsense?
It will be good to do a sed fixup for all these printk_deferred uses soon, but in the meantime isn't it useful to avoid BUGs?
