Re: [PATCH 2/4] serial: core: fix broken sysrq port unlock

From: Andy Shevchenko
Date: Tue Jun 02 2020 - 10:48:44 EST

On Tue, Jun 2, 2020 at 5:03 PM Johan Hovold <johan@xxxxxxxxxx> wrote:
> Commit d6e1935819db ("serial: core: Allow processing sysrq at port
> unlock time") worked around a circular locking dependency by adding
> helpers used to defer sysrq processing to when the port lock was
> released.
> A later commit unfortunately converted these inline helpers to exported
> functions despite the fact that the unlock helper was restoring irq
> flags, something which needs to be done in the same function that saved
> them (e.g. on SPARC).

I'm not familiar with sparc, can you elaborate a bit what is ABI /
architecture lock implementation background?

With Best Regards,
Andy Shevchenko