linux-kernel - Re: [PATCH v4] perf: bpf: Fix build breakage due to libbpf

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Date:	Sat, 9 Jan 2016 10:03:20 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	"Wangnan (F)" <wangnan0@...wei.com>,
	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
	linuxppc-dev@...ts.ozlabs.org, Jiri Olsa <jolsa@...nel.org>,
	linux-kernel@...r.kernel.org, sukadev@...ux.vnet.ibm.com,
	Philip Li <philip.li@...el.com>
Subject: Re: [PATCH v4] perf: bpf: Fix build breakage due to libbpf

Hi Arnaldo,

On Fri, Jan 08, 2016 at 10:46:08AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Jan 08, 2016 at 09:31:46PM +0800, Wangnan (F) escreveu:
> > On 2016/1/8 20:51, Arnaldo Carvalho de Melo wrote:
> > >Em Fri, Jan 08, 2016 at 11:09:35AM +0530, Naveen N. Rao escreveu:
> > >>On 2016/01/07 05:39PM, Arnaldo Carvalho de Melo wrote:
> > >>>Em Thu, Jan 07, 2016 at 12:28:15PM +0530, Naveen N. Rao escreveu:
> > >>>>On 2015/12/17 09:19AM, Arnaldo Carvalho de Melo wrote:
> > >>>>>Em Thu, Dec 17, 2015 at 10:37:14AM +0530, Naveen N. Rao escreveu:
> > >>>>Arnaldo,
> > >>>>Can you please push at least the initial 3 patches of this for v4.4?
> > >>>>Wang Nan has posted v6 here:
> > >>>>http://thread.gmane.org/gmane.linux.kernel/2110626
> > >>>So I tried it again today, from the v6, the latest patch with that
> > >>>subject line in my inbox, and I get this, after applying the first three
> > >>>patches:
> 
> > >>>$ make -C tools clean > /dev/null
> > >>>$ make -C tools/perf build-test
> > >>Thanks, and sorry for the slip-up there - I should've caught that.
> > >The important thing is that it gets caught before getting to Ingo, let
> > >alone Linus, but if you get it before me, I'd appreciate as well 8-)
>  
> > Is it possible to ask Fengguang Wu to help us adding perf building test
> > in his kbuild testing system?
> 
> I was thinking about this yesterday, when, IIRC, a change made by Kan
> Liang (IIRC) to a kernel/events/ file, in the kernel proper, triggered a
> warning about some casts and I got a warning, since I was in the commig
> log CC list.
> 
> Since perf is in the kernel sources, and since we have the 'make -C
> tools/perf build-test' harness, that would be really great to have it
> hooked into the 0day bot...

Yes it should be handy to do so.
CC Philip, he's now maintaining the 0day system.

Thanks,
Fengguang