linux-kernel - Re: [PATCH v2 07/12] rbtree: adjust root color in rb_insert

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Date:	Fri, 31 Aug 2012 12:25:10 +0300
From:	Alexander Shishkin <alexander.shishkin@...el.com>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Michel Lespinasse <walken@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, acme@...hat.com
Subject: Re: [PATCH v2 07/12] rbtree: adjust root color in rb_insert_color() only when necessary

Adrian Hunter <adrian.hunter@...el.com> writes:

> On 31/08/12 11:15, Andrew Morton wrote:
>> On Fri, 31 Aug 2012 01:07:24 -0700 Michel Lespinasse <walken@...gle.com> wrote:
>> 
>>> On Fri, Aug 31, 2012 at 1:01 AM, Adrian Hunter <adrian.hunter@...el.com> wrote:
>>>> This breaks tools/perf build in linux-next:
>>>>
>>>> ../../lib/rbtree.c: In function 'rb_insert_color':
>>>> ../../lib/rbtree.c:95:9: error: 'true' undeclared (first use in this function)
>>>> ../../lib/rbtree.c:95:9: note: each undeclared identifier is reported only once for each function it appears in
>>>> ../../lib/rbtree.c: In function '__rb_erase_color':
>>>> ../../lib/rbtree.c:216:9: error: 'true' undeclared (first use in this function)
>>>> ../../lib/rbtree.c: In function 'rb_erase':
>>>> ../../lib/rbtree.c:368:2: error: unknown type name 'bool'
>>>> make: *** [util/rbtree.o] Error 1
>>>
>>> I thought Andrew had a patch
>>> rbtree-adjust-root-color-in-rb_insert_color-only-when-necessary-fix-perf-compilation
>>> that fixed this though a Makefile change ?
>> 
>> Yup.  But it's unclear why we should include the header via the cc
>> command line?
>
> Dunno
>
> AFAICS tools/perf/util/include/linux is for fixing up the
> differences between kernel headers and exported kernel headers.
> Hence my change:
>
> diff --git a/tools/perf/util/include/linux/rbtree.h b/tools/perf/util/include/linux/rbtree.h
> index 7a243a1..2a030c5 100644
> --- a/tools/perf/util/include/linux/rbtree.h
> +++ b/tools/perf/util/include/linux/rbtree.h
> @@ -1 +1,2 @@
> +#include <stdbool.h>
>  #include "../../../../include/linux/rbtree.h"
>
> Alex?

Whichever color like best. :) Consider my initial patch a bugreport.

Regards,
--
Alex
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