linux-kernel - Re: [RFC][PATCH] tags: Fix DEFINE_PER

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Message-ID: <20160301163707.GF3965@htj.duckdns.org>
Date:	Tue, 1 Mar 2016 11:37:07 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>, rjw@...ysocki.net,
	konrad.wilk@...cle.com, Ingo Molnar <mingo@...nel.org>,
	paulmck@...ux.vnet.ibm.com, davem@...emloft.net,
	linux-acpi@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [RFC][PATCH] tags: Fix DEFINE_PER_CPU expansions

Hello, Peter.

On Tue, Mar 01, 2016 at 11:26:25AM +0100, Peter Zijlstra wrote:
> 
> $ make tags
>   GEN     tags
> ctags: Warning: drivers/acpi/processor_idle.c:64: null expansion of name pattern "\1"
> ctags: Warning: drivers/xen/events/events_2l.c:41: null expansion of name pattern "\1"
> ctags: Warning: kernel/locking/lockdep.c:151: null expansion of name pattern "\1"
> ctags: Warning: kernel/rcu/rcutorture.c:133: null expansion of name pattern "\1"
> ctags: Warning: kernel/rcu/rcutorture.c:135: null expansion of name pattern "\1"
> ctags: Warning: kernel/workqueue.c:323: null expansion of name pattern "\1"
> ctags: Warning: net/ipv4/syncookies.c:53: null expansion of name pattern "\1"
> ctags: Warning: net/ipv6/syncookies.c:44: null expansion of name pattern "\1"
> ctags: Warning: net/rds/page.c:45: null expansion of name pattern "\1"
> 
> Which are all the result of the DEFINE_PER_CPU pattern:
> 
> scripts/tags.sh:200:	'/\<DEFINE_PER_CPU([^,]*, *\([[:alnum:]_]*\)/\1/v/'
> scripts/tags.sh:201:	'/\<DEFINE_PER_CPU_SHARED_ALIGNED([^,]*, *\([[:alnum:]_]*\)/\1/v/'
> 
> The below cures them. All except the workqueue one are within reasonable
> distance of the 80 char limit. TJ do you have any preference on how to
> fix the wq one, or shall we just not care its too long?

Urgh... I really hate the fact that we're putting on arbitrary
formatting constraints to compensate for shortcomings in an
out-of-line utility.  Can't it do multiline regex?

Thanks.

-- 
tejun