linux-kernel - Re: [PATCH 2/2] perf ppc64le: Fix probe location when using DWARF

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Date:	Thu, 11 Aug 2016 14:40:35 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Cc:	Anton Blanchard <anton@...ba.org>, linux-kernel@...r.kernel.org,
	peterz@...radead.org, mingo@...hat.com,
	alexander.shishkin@...ux.intel.com, bsingharora@...il.com,
	naveen.n.rao@...ux.vnet.ibm.com, ananth@...ibm.com,
	mhiramat@...nel.org, wangnan0@...wei.com, namhyung@...nel.org,
	Hemant Kumar <hemant@...ux.vnet.ibm.com>
Subject: Re: [PATCH 2/2] perf ppc64le: Fix probe location when using DWARF

Em Thu, Aug 11, 2016 at 11:49:00AM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Thu, Aug 11, 2016 at 06:51:39PM +0530, Ravi Bangoria escreveu:
> > On Thursday 11 August 2016 05:20 PM, Arnaldo Carvalho de Melo wrote:
> > > Can you please provide a better explanation? I had to look at the patch
> > > to understand what it was fixing, and then the patch adds LIBELF_SUPPORT
> > > ifdefs while the patch description, talks about DWARF.

> > Yes. Explanation could have been better. Apologies for that.

> > arch__post_process_probe_trace_events() calls get_target_map() to prepare
> > symbol table. get_target_map() is defined inside util/probe-event.c.

> > probe-event.c will only get included in perf binary if CONFIG_LIBELF is set.
> > Hence arch__post_process_probe_trace_events() needs to be defined inside
> > #ifdef HAVE_LIBELF_SUPPORT to solve compilation error.
 
> > Please let me know if any doubts.
 
> Thanks, that is better, will add this there.

But the patch his mangled, you use:

User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101
        Thunderbird/38.5.1

Please read Documentation/email-clients.txt, there are ways to fix the
sending of patches.

I fixed it up this time, there were two instances like:

[acme@...et linux]$ patch -p1 < /wb/1.patch 
patching file tools/perf/arch/powerpc/util/sym-handling.c
patch: **** malformed patch at line 33: @@ -118,5 +119,6 @@ void arch__post_process_probe_trace_events(struct 

it breaks down long lines ;-\

[acme@...et linux]$

- Arnaldo