linux-kernel - Re: perf eBPF patch ordering. was: Re: perf test LLVM was: Re: [GIT PULL 00/39] perf tools: filtering events using eBPF programs

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Message-ID: <20150804155557.GB3126@kernel.org>
Date:	Tue, 4 Aug 2015 12:55:57 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	"Wangnan (F)" <wangnan0@...wei.com>
Cc:	pi3orama <pi3orama@....com>, He Kuang <hekuang@...wei.com>,
	Li Zefan <lizefan@...wei.com>,
	Alexei Starovoitov <ast@...mgrid.com>,
	Xia Kaixu <xiakaixu@...wei.com>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
	David Ahern <dsahern@...il.com>,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: perf eBPF patch ordering.  was: Re: perf test LLVM was: Re: [GIT
 PULL 00/39] perf tools: filtering events using eBPF programs

Em Tue, Aug 04, 2015 at 06:39:39PM +0800, Wangnan (F) escreveu:
> Just realized that 'tempnam' is not safe. Switch to mkdtemp. Please see the
> new version:
> 
> https://github.com/WangNan0/linux/commit/bd02aed760c4a35fec4483d24c158799f05f6f9e
> 
> and pull request update:
> 
> The following changes since commit 922cc21746202956acb41c89a6190bb50805fa31:
> 
>   perf tools: Introduce llvm config options (2015-07-31 12:17:50 -0300)
> 
> are available in the git repository at:
> 
>   https://github.com/WangNan0/linux.git ebpf

Ok, but I am checking patch by patch to see if the changes I made are
kept, and for the first one, it wasn't (the second one is the cset in
your newest github tree: cceb9fed5722dc78730e7ed739b75ece4476740f, the
other is for my tree, that was rebased, but the contents should be the
same as what is in my  perf/ebpf branch in git.kernel.org), I'm keeping
my version, will check the others:

[acme@...icio linux]$ gdiff f696ecb01b519ae8273b2876b45678b920767f8a cceb9fed5722dc78730e7ed739b75ece4476740f
--- /tmp/gdiff.f696ecb01b519ae8273b2876b45678b920767f8a.y3ojwYFV0g	2015-08-04 12:53:29.898525129 -0300
+++ /tmp/gdiff.cceb9fed5722dc78730e7ed739b75ece4476740f.1ximzKA8ST	2015-08-04 12:53:29.900525095 -0300
@@ -1,4 +1,4 @@
-commit f696ecb01b519ae8273b2876b45678b920767f8a
+commit cceb9fed5722dc78730e7ed739b75ece4476740f
 Author: Wang Nan <wangnan0@...wei.com>
 Date:   Thu Jun 11 10:31:09 2015 +0000
 
@@ -14,20 +14,8 @@
         source code path is injected into shell command using environment
         variable using force_set_env().
     
-      Commiter notice:
-    
-      When building with DEBUG=1 we get a compiler error that gets fixed with
-      the same approach described in commit b236512280fb:
-    
-        perf kmem: Fix compiler warning about may be accessing uninitialized variable
-    
-        The last argument to strtok_r doesn't need to be initialized, its
-        just a placeholder to make this routine reentrant, but gcc doesn't know
-        about that and complains, breaking the build, fix it by setting it to
-        NULL.
-    
     Signed-off-by: Wang Nan <wangnan0@...wei.com>
-    Acked-by: Alexei Starovoitov <ast@...mgrid.com>
+    Cc: Alexei Starovoitov <ast@...mgrid.com>
     Cc: Brendan Gregg <brendan.d.gregg@...il.com>
     Cc: Daniel Borkmann <daniel@...earbox.net>
     Cc: David Ahern <dsahern@...il.com>
@@ -43,7 +32,7 @@
     Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
 
 diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c
-index 472e8cd69361..7d01fcc23aa8 100644
+index 472e8cd69361..08e2eb1354e3 100644
 --- a/tools/perf/util/llvm-utils.c
 +++ b/tools/perf/util/llvm-utils.c
 @@ -43,3 +43,228 @@ int perf_llvm_config(const char *var, const char *value)
@@ -55,7 +44,7 @@
 +search_program(const char *def, const char *name,
 +	       char *output)
 +{
-+	char *env, *path, *tmp = NULL;
++	char *env, *path, *tmp;
 +	char buf[PATH_MAX];
 +	int ret;
 +

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