Re: [PATCH v6 24/29] watchdog/hardlockup: Use parse_option_str() to handle "nmi_watchdog"

[Ricardo Neri]

On Tue, May 10, 2022 at 08:46:41PM +1000, Nicholas Piggin wrote:
> Excerpts from Ricardo Neri's message of May 6, 2022 10:00 am:
> > Prepare hardlockup_panic_setup() to handle a comma-separated list of
> > options. Thus, it can continue parsing its own command-line options while
> > ignoring parameters that are relevant only to specific implementations of
> > the hardlockup detector. Such implementations may use an early_param to
> > parse their own options.
> 
> It can't really handle comma separated list though, until the next
> patch. nmi_watchdog=panic,0 does not make sense, so you lost error
> handling of that.

Yes that is true. All possible combinations need to be checked.

> 
> And is it kosher to double handle options like this? I'm sure it
> happens but it's ugly.
> 
> Would you consider just add a new option for x86 and avoid changing
> this? Less code and patches.

Sure, I can not modify this code and add a x86-specific command-line
option.

Thanks and BR,
Ricardo