linux-kernel - Re: [PATCH] checkpatch: avoid default n

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Date:   Wed, 3 Jul 2019 19:22:30 +0800
From:   Miles Chen <miles.chen@...iatek.com>
To:     Joe Perches <joe@...ches.com>
CC:     Andy Whitcroft <apw@...onical.com>, <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <wsd_upstream@...iatek.com>
Subject: Re: [PATCH] checkpatch: avoid default n

On Wed, 2019-07-03 at 01:42 -0700, Joe Perches wrote:
> On Wed, 2019-07-03 at 16:30 +0800, Miles Chen wrote:
> > This change reports a warning when "default n" is used.
> > 
> > I have seen several "remove default n" patches, so I think
> > it might be helpful to add this test in checkpatch.
> > 
> > tested:
> > WARNING: 'default n' is the default value, no need to write it explicitly.
> > +       default n
> 
> I don't think this is reasonable as there are
> several uses like:
> 
> 		default y
> 		default n if <foo>
> 
> For instance:
> 
> arch/alpha/Kconfig-config ALPHA_WTINT
> arch/alpha/Kconfig-     bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
> arch/alpha/Kconfig-     default y if ALPHA_QEMU
> arch/alpha/Kconfig:     default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
> arch/alpha/Kconfig:     default n if !ALPHA_SRM && !ALPHA_GENERIC
> 
> 
Thanks for your comment, perhaps we can just deal with the "default n$"
case?

like:
+         $line =~ /^\+\s*\bdefault n$/) {