linux-kernel - Re: linux-next: build warnings after merge of the kbuild tree

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Date:	Wed, 8 Jun 2016 19:56:38 -0700
From:	Kees Cook <keescook@...omium.org>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Michal Marek <mmarek@...e.cz>,
	Linux-Next <linux-next@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Emese Revfy <re.emese@...il.com>
Subject: Re: linux-next: build warnings after merge of the kbuild tree

On Wed, Jun 8, 2016 at 7:22 PM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> Hi Michal,
>
> After merging the kbuild tree, today's linux-next build (x86_64
> allmodconfig) produced these warnings:
>
> Cyclomatic Complexity 1 scripts/mod/devicetable-offsets.c:main
> Cyclomatic Complexity 1 kernel/bounds.c:foo
> Cyclomatic Complexity 1 arch/x86/kernel/asm-offsets_64.c:main
> Cyclomatic Complexity 1 arch/x86/kernel/asm-offsets.c:common
> Cyclomatic Complexity 5 arch/x86/ia32/audit.c:ia32_classify_syscall
>
> and so on (many, many of these - about 635,000 :-()

Congratulations on having the gcc plugin development headers
successfully installed! ;)

> Introduced (presumably) by commits
>
>   6b90bd4ba40b ("GCC plugin infrastructure")
>   0dae776c6bf3 ("Add Cyclomatic complexity GCC plugin")
>
> I have disabled CONFIG_GCC_PLUGIN_CYC_COMPLEXITY (by making it depend
> on CONFIG_BROKEN) until it is not enabled by default.

Ah, yes, that should default to off. We'll get a fix landed ASAP.

-Kees

-- 
Kees Cook
Chrome OS & Brillo Security