linux-kernel - Re: [PATCH 06/54] perf tools: Add API to config maps in bpf object

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Date:	Mon, 22 Feb 2016 12:17:10 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	"Wangnan (F)" <wangnan0@...wei.com>
Cc:	Alexei Starovoitov <ast@...nel.org>,
	Brendan Gregg <brendan.d.gregg@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Cody P Schafer <dev@...yps.com>,
	"David S. Miller" <davem@...emloft.net>,
	He Kuang <hekuang@...wei.com>,
	Jérémie Galarneau 
	<jeremie.galarneau@...icios.com>, Jiri Olsa <jolsa@...nel.org>,
	Kirill Smelkov <kirr@...edi.com>,
	Li Zefan <lizefan@...wei.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>, pi3orama@....com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/54] perf tools: Add API to config maps in bpf object

Em Mon, Feb 22, 2016 at 12:05:36PM +0800, Wangnan (F) escreveu:
> 
> 
> On 2016/2/19 21:53, Arnaldo Carvalho de Melo wrote:
> >Sorry for the top post, but the message below didn't made it thru due to
> >local problems as I recently switched notebooks, my postfix setup barfed
> >this one :-\
> >
> >This is what I have in my tmp.perf/bpf_map:
> >
> >https://git.kernel.org/cgit/linux/kernel/git/acme/linux.git/commit/?h=tmp.perf/bpf_map&id=5c78fe3c5a944ba7f9a85f59548295211f3d252c
> >
> >Please take a look and see if you're ok with it,
> 
> I agree your change, but the commit you mentioned has a bug
> which I have already fixed in Feb. 19 patch set:
> 
> At bpf_map__config_value:
> 
> +        if (!term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
> +                pr_debug("ERROR: wrong value type\n");
> +                return -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE;
> +        }
> 
> Should use
> 
>          if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
> 
> I'll switch 'maps' to 'map' as you did in my tree and send this
> patch again. (still based on perf/core, so I can solve potential
> conflicts in my side).

Ok, going thru the patchkit again, noticed the only change was the above
one for this patch, thanks:


uet linux]$ interdiff /wb/1.patch /tmp/acme.patch 
diff -u b/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
--- b/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -897,7 +897,7 @@
 		return -BPF_LOADER_ERRNO__OBJCONF_CONF;
 	}
 
-	if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM) {
+	if (!term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
 		pr_debug("ERROR: wrong value type\n");
 		return -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE;
 	}
[acme@...et linux]$