Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Reply-To: muriloo@linux.ibm.com
Subject: Re: [PATCH] perf session: Fix undeclared 'oe'
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     linux-kernel@vger.kernel.org, stable@vger.kernel.org,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Andi Kleen <ak@linux.intel.com>,
        Arnaldo Carvalho de Melo <acme@redhat.com>,
        David Carrillo-Cisneros <davidcc@google.com>,
        He Kuang <hekuang@huawei.com>, Ingo Molnar <mingo@redhat.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Paul Mackerras <paulus@samba.org>,
        Paul Turner <pjt@google.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Sasha Levin <alexander.levin@microsoft.com>,
        Simon Que <sque@chromium.org>,
        Stephane Eranian <eranian@google.com>,
        Wang Nan <wangnan0@huawei.com>
References: <20180411184135.27664-1-muriloo@linux.ibm.com>
 <20180411193353.GA5656@kroah.com>
From:   =?UTF-8?Q?Murilo_Opsfelder_Ara=c3=bajo?= <muriloo@linux.ibm.com>
Openpgp: preference=signencrypt
Autocrypt: addr=muriloo@linux.ibm.com; prefer-encrypt=mutual; keydata=
 xsBNBFC2LJYBCADMXZCh0JjMe5T/r1QaUHwCCCvyVaMVniJyTBaqUXPujCaddOKJF+Qhnpnp
 0QJfOr/mnpeXe/HXHw1ICEBlMLfgR+VzQKvb7PHCtrKLEhCKeQOhmII4sxvpUfV/zjZBqp9z
 1ljZ+QJLr2j7mkKwdc1tZ2fyhev1OkbeeRgs3vAN1YMzN4BA1qRvID6BJBVE0SaMM0V4TxOH
 kjmA91n+B9rC3PQk03gN+7UAbrat3DQEAhLvrRyL3ncOWO6uayN7a5LvxxtrJrHJpaNcWdGD
 aUWXEfLsD4wD3xzldReOejqgxn2NOhvWa1P7MptwgXNYgPNLZ5nEVQLtD/CP37lS5KibABEB
 AAHNLk11cmlsbyBPcHNmZWxkZXIgQXJhdWpvIDxtdXJpbG9Ab3BzZmVsZGVyLmNvbT7CwHsE
 EwECACUCGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheABQJQti/pAhkBAAoJEJThzGhIzw44
 IaAIALToGEGjp1E4Cvr6BoznLPDoWMmfiGeyekZihS/SsANM4hAV9982x4BXRjde4wICSMEt
 sBy+t0FUKr4gbNGzAb10P1OifLfqwlPfpHkolvd71hCBS3CDvnwoADDKcIttKqSy6EsSFPX7
 5qqX/G2gVBjmZTxfj54EjQ7QE2EQdkqX1Rj/BBaiUyDtWjpIzieRdnkAkjKY0iOU7jX9Z8aD
 LcIijXgD6x594peuhORXMeBMmcdKOylKeS7JzRln37xHs5HYzSr2BMFm9Cvh7L4n4zL2UuJ9
 7HhcXbAyhlU/slRjeBNnn0X4JRZmmgpYoxOcrP/3iZvlXDf+qMzoxd4H0I3OwE0EULYslgEI
 AJpuIIHFGV4l3aneSjMLRRX94w+n9HmOQWG3pcqVyv0rnhr9qnov7HTNQ+kPw6eXFWTxHXJD
 4++eGizTHdtptcw73G8bzBs8hj9N85DTYon3doIEtQwRQdvd3I/oLL8PyKvRGmrJ17Aecprf
 69OIqp43SIuH5rQ9u7uIS2dKxql+3v0VE5IcARyF82k8Ys7Jf0OtIFoIZRIF8sQkGFGJHlfa
 w0dMdfkvm9+ASUYJyCi1ggyyd46l4XTjAPs1wQwyLRmJ4aleL5FiXdTNNQ8SmYGDy17werKL
 fWcgqOZC/Z3cEK1LvYUzcqGrf8/3bsP2QMfvFmPEV4W2Co0DqPDxg1UAEQEAAcLAXwQYAQIA
 CQUCULYslgIbDAAKCRCU4cxoSM8OOJPBB/4ld3N0LoT57XIZj2ZCJ0C9VdknlE9QTEG2huD0
 mVAL2Em3ZydgJz/TWXEKAMO50OHDvHiRFutFGZtHZuhCDgENQCaRvyI/xfi/UUA29J8Ahg2l
 zaICSEXwAuFZnecurvgTX2ioZNPrri2rgjKqEB+uJhkYXAziMCFSq1m+blREfjipiPKnTcLB
 EYizy8CewE2qHW2whXiYO7E+UPg186pF86bXiNYpEJSWB9z7ZlFsHE+ABngUjqrrCAmoteTK
 URTzrqPMFaiUrColsoulJamkbEn7amM9pN285U3CFREnsRv5m7TmSnPhZbBzAbEeHEaeqwO3
 xFlpAuK/RlKTJ/9D
Organization: IBM
Date:   Wed, 11 Apr 2018 17:21:29 -0300
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.7.0
MIME-Version: 1.0
In-Reply-To: <20180411193353.GA5656@kroah.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 8bit
Message-Id: <82d8f577-bbbb-0419-bf41-057522eb3f30@linux.ibm.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 04/11/2018 04:33 PM, Greg Kroah-Hartman wrote:
> On Wed, Apr 11, 2018 at 03:41:35PM -0300, Murilo Opsfelder Araujo wrote:
>> Using linux-3.18.y branch, perf build fails with the following:
>>
>>     $ make -s -j16 -C tools/perf V=1 WERROR=0 NO_LIBUNWIND=1 HAVE_CPLUS_DEMANGLE=1 NO_GTK2=1 NO_LIBNUMA=1 NO_STRLCPY=1 NO_BIONIC=1 prefix=/usr DESTDIR=/tmp/builddir/build all
>>     [...]
>>     util/session.c: In function ‘__perf_session__process_pipe_events’:
>>     util/session.c:1093:36: error: ‘oe’ undeclared (first use in this function)
>>       ordered_events__set_copy_on_queue(oe, true);
>>                                         ^
>>     util/session.c:1093:36: note: each undeclared identifier is reported only once for each function it appears in
>>
>> This patch fixes it for linux-3.18.y branch.
> 
> Why is this failing now?  Has it always been broken?  Is there an
> upstream patch that fixed this instead?
> 

Hi, Greg.

We've caught this build issue this week. I'm not sure since when it's
failing.

The upstream patch that fixes this is:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fa713a4eb9cebe5dec71b1bd11429603e17d841d

commit fa713a4eb9cebe5dec71b1bd11429603e17d841d
Author: Arnaldo Carvalho de Melo <acme@redhat.com>
Date:   Tue Mar 3 11:48:12 2015 -0300

    perf ordered_events: Untangle from perf_session

But it doesn't apply straightforwardly.  At
fa713a4eb9cebe5dec71b1bd11429603e17d841d, perf API and perf_evlist
struct are slightly different from linux-3.18.y.

A list of upstream patches for a clean backport (I think) would be:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=54245fdc357613633954bfd38cffb71cb9def067

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=75be989a7a18e9666efd92b846ee48bed79e8086

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=313e53b08e99b1dacf9ea2b0fbe97890db1ea95f

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9fa8727aa4d98d35ca50ef9cd8a50c6468af921d

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fa713a4eb9cebe5dec71b1bd11429603e17d841d

Do you prefer all above patches backported to linux-3.18.y or just the
one-line fix I sent?

>> Fixes: 95b33b99cdd6 ("perf inject: Copy events when reordering events in pipe mode")
> 
> Was this just a bad backport?

Some patches were left behind, I guess.

> 
> thanks,
> 
> greg k-h
> 

Cheers
Murilo