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Re: [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V Sockets

Started bykbuild test robot <lkp@intel.com>
First post2016-07-19 19:20 +0200
Last post2016-07-20 06:30 +0200
Articles 6 — 4 participants

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  Re: [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V Sockets kbuild test robot <lkp@intel.com> - 2016-07-19 19:20 +0200
    RE: [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V Sockets Dexuan Cui <decui@microsoft.com> - 2016-07-20 03:50 +0200
      Re: [kbuild-all] [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V  Sockets Fengguang Wu <lkp@intel.com> - 2016-07-20 04:00 +0200
      Re: [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V Sockets David Miller <davem@davemloft.net> - 2016-07-20 05:00 +0200
        Re: [kbuild-all] [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V  Sockets Fengguang Wu <lkp@intel.com> - 2016-07-20 05:10 +0200
        RE: [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V Sockets Dexuan Cui <decui@microsoft.com> - 2016-07-20 06:30 +0200

#1446607 — Re: [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V Sockets

Fromkbuild test robot <lkp@intel.com>
Date2016-07-19 19:20 +0200
SubjectRe: [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V Sockets
Message-ID<rWGQx-6Of-11@gated-at.bofh.it>

[Multipart message — attachments visible in raw view] — view raw

Hi,

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Dexuan-Cui/introduce-Hyper-V-VM-Sockets-hv_sock/20160715-223433
config: x86_64-randconfig-a0-07191719 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   net/hv_sock/af_hvsock.c: In function 'hvsock_open_connection':
   net/hv_sock/af_hvsock.c:693: warning: 'hvsk' may be used uninitialized in this function
   net/hv_sock/af_hvsock.c:693: warning: 'new_hvsk' may be used uninitialized in this function
   net/hv_sock/af_hvsock.c:697: warning: 'new_sk' may be used uninitialized in this function
   net/hv_sock/af_hvsock.c: In function 'hvsock_sendmsg_wait':
   net/hv_sock/af_hvsock.c:1053: warning: 'ret' may be used uninitialized in this function
>> net/hv_sock/af_hvsock.o: warning: objtool: hvsock_on_channel_cb()+0x1d: function has unreachable instruction

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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#1446879

FromDexuan Cui <decui@microsoft.com>
Date2016-07-20 03:50 +0200
Message-ID<rWOO5-3gp-1@gated-at.bofh.it>
In reply to#1446607
> From: kbuild test robot [mailto:lkp@intel.com]
> Sent: Wednesday, July 20, 2016 1:10
> 
> Hi,
> 
> [auto build test WARNING on net-next/master]
> 
> url:    https://github.com/0day-ci/linux/commits/Dexuan-Cui/introduce-
> Hyper-V-VM-Sockets-hv_sock/20160715-223433
> config: x86_64-randconfig-a0-07191719 (attached as .config)
> compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=x86_64
> 
> All warnings (new ones prefixed by >>):
> 
>    net/hv_sock/af_hvsock.c: In function 'hvsock_open_connection':
>    net/hv_sock/af_hvsock.c:693: warning: 'hvsk' may be used uninitialized in
> this function
>    net/hv_sock/af_hvsock.c:693: warning: 'new_hvsk' may be used
> uninitialized in this function
>    net/hv_sock/af_hvsock.c:697: warning: 'new_sk' may be used uninitialized
> in this function
>    net/hv_sock/af_hvsock.c: In function 'hvsock_sendmsg_wait':
>    net/hv_sock/af_hvsock.c:1053: warning: 'ret' may be used uninitialized in
> this function
> >> net/hv_sock/af_hvsock.o: warning: objtool: hvsock_on_channel_cb()+0x1d:
> function has unreachable instruction

These warnings are all false alarms.

Thanks,
-- Dexuan

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#1446881 — Re: [kbuild-all] [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V Sockets

FromFengguang Wu <lkp@intel.com>
Date2016-07-20 04:00 +0200
SubjectRe: [kbuild-all] [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V Sockets
Message-ID<rWOXL-3jD-1@gated-at.bofh.it>
In reply to#1446879
Yes, sorry for the noises!

>> >> net/hv_sock/af_hvsock.o: warning: objtool: hvsock_on_channel_cb()+0x1d:
>> function has unreachable instruction
>
>These warnings are all false alarms.
>
>Thanks,
>-- Dexuan
>_______________________________________________
>kbuild-all mailing list
>kbuild-all@lists.01.org
>https://lists.01.org/mailman/listinfo/kbuild-all

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#1446906

FromDavid Miller <davem@davemloft.net>
Date2016-07-20 05:00 +0200
Message-ID<rWPTP-41h-17@gated-at.bofh.it>
In reply to#1446879
From: Dexuan Cui <decui@microsoft.com>
Date: Wed, 20 Jul 2016 01:48:18 +0000

>> From: kbuild test robot [mailto:lkp@intel.com]
>> Sent: Wednesday, July 20, 2016 1:10
>> 
>> Hi,
>> 
>> [auto build test WARNING on net-next/master]
>> 
>> url:    https://github.com/0day-ci/linux/commits/Dexuan-Cui/introduce-
>> Hyper-V-VM-Sockets-hv_sock/20160715-223433
>> config: x86_64-randconfig-a0-07191719 (attached as .config)
>> compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
>> reproduce:
>>         # save the attached .config to linux build tree
>>         make ARCH=x86_64
>> 
>> All warnings (new ones prefixed by >>):
>> 
>>    net/hv_sock/af_hvsock.c: In function 'hvsock_open_connection':
>>    net/hv_sock/af_hvsock.c:693: warning: 'hvsk' may be used uninitialized in
>> this function
>>    net/hv_sock/af_hvsock.c:693: warning: 'new_hvsk' may be used
>> uninitialized in this function
>>    net/hv_sock/af_hvsock.c:697: warning: 'new_sk' may be used uninitialized
>> in this function
>>    net/hv_sock/af_hvsock.c: In function 'hvsock_sendmsg_wait':
>>    net/hv_sock/af_hvsock.c:1053: warning: 'ret' may be used uninitialized in
>> this function
>> >> net/hv_sock/af_hvsock.o: warning: objtool: hvsock_on_channel_cb()+0x1d:
>> function has unreachable instruction
> 
> These warnings are all false alarms.

But you still have to quiet them.

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#1446915 — Re: [kbuild-all] [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V Sockets

FromFengguang Wu <lkp@intel.com>
Date2016-07-20 05:10 +0200
SubjectRe: [kbuild-all] [PATCH v17 net-next 1/1] hv_sock: introduce Hyper-V Sockets
Message-ID<rWQ3v-4jO-11@gated-at.bofh.it>
In reply to#1446906
On Tue, Jul 19, 2016 at 07:52:53PM -0700, David Miller wrote:
>From: Dexuan Cui <decui@microsoft.com>
>Date: Wed, 20 Jul 2016 01:48:18 +0000
>
>>> From: kbuild test robot [mailto:lkp@intel.com]
>>> Sent: Wednesday, July 20, 2016 1:10
>>>
>>> Hi,
>>>
>>> [auto build test WARNING on net-next/master]
>>>
>>> url:    https://github.com/0day-ci/linux/commits/Dexuan-Cui/introduce-
>>> Hyper-V-VM-Sockets-hv_sock/20160715-223433
>>> config: x86_64-randconfig-a0-07191719 (attached as .config)
>>> compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
>>> reproduce:
>>>         # save the attached .config to linux build tree
>>>         make ARCH=x86_64
>>>
>>> All warnings (new ones prefixed by >>):
>>>
>>>    net/hv_sock/af_hvsock.c: In function 'hvsock_open_connection':
>>>    net/hv_sock/af_hvsock.c:693: warning: 'hvsk' may be used uninitialized in
>>> this function
>>>    net/hv_sock/af_hvsock.c:693: warning: 'new_hvsk' may be used
>>> uninitialized in this function
>>>    net/hv_sock/af_hvsock.c:697: warning: 'new_sk' may be used uninitialized
>>> in this function
>>>    net/hv_sock/af_hvsock.c: In function 'hvsock_sendmsg_wait':
>>>    net/hv_sock/af_hvsock.c:1053: warning: 'ret' may be used uninitialized in
>>> this function
>>> >> net/hv_sock/af_hvsock.o: warning: objtool: hvsock_on_channel_cb()+0x1d:
>>> function has unreachable instruction
>>
>> These warnings are all false alarms.
>
>But you still have to quiet them.

Agreed.

However the last warning

        objtool: hvsock_on_channel_cb()+0x1d: function has unreachable instruction

is my fault -- it turns out to be a problem with old gcc-4.4 and
gcc-4.6 which we enabled 2 days ago. I just disabled reporting this
odd warning because it complaints on ~10000 functions all over the
place, which can only be sanely fixed in the toolchain.

Thanks,
Fengguang

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#1446952

FromDexuan Cui <decui@microsoft.com>
Date2016-07-20 06:30 +0200
Message-ID<rWRiV-52m-17@gated-at.bofh.it>
In reply to#1446906
> From: David Miller [mailto:davem@davemloft.net]
> >> From: kbuild test robot [mailto:lkp@intel.com]
> >> [auto build test WARNING on net-next/master]
> >>
> >> url:    https://github.com/0day-ci/linux/commits/Dexuan-Cui/introduce-
> >> Hyper-V-VM-Sockets-hv_sock/20160715-223433
> >> config: x86_64-randconfig-a0-07191719 (attached as .config)
> >> compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
> >> reproduce:
> >>         # save the attached .config to linux build tree
> >>         make ARCH=x86_64
> >>
> >> All warnings (new ones prefixed by >>):
> >>
> >>    net/hv_sock/af_hvsock.c: In function 'hvsock_open_connection':
> >>    net/hv_sock/af_hvsock.c:693: warning: 'hvsk' may be used uninitialized
> in
> >> this function
> >>    net/hv_sock/af_hvsock.c:693: warning: 'new_hvsk' may be used
> >> uninitialized in this function
> >>    net/hv_sock/af_hvsock.c:697: warning: 'new_sk' may be used
> uninitialized
> >> in this function
> >>    net/hv_sock/af_hvsock.c: In function 'hvsock_sendmsg_wait':
> >>    net/hv_sock/af_hvsock.c:1053: warning: 'ret' may be used uninitialized
> in
> >> this function
> >> >> net/hv_sock/af_hvsock.o: warning: objtool:
> hvsock_on_channel_cb()+0x1d:
> >> function has unreachable instruction
> >
> > These warnings are all false alarms.
> 
> But you still have to quiet them.

Sure. Will do.

Thanks,
-- Dexuan

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