From: Jan Blunck <jblunck@infradead.org>
To: Shreyansh Jain <shreyansh.jain@nxp.com>
Cc: dev@dpdk.org, David Marchand <david.marchand@6wind.com>,
Thomas Monjalon <thomas.monjalon@6wind.com>,
Ferruh Yigit <ferruh.yigit@intel.com>,
jianbo.liu@linaro.org, Jan Viktorin <viktorin@rehivetech.com>
Subject: Re: [dpdk-dev] [PATCH v2 01/12] eal: define container_of macro
Date: Fri, 16 Dec 2016 09:14:29 +0100 [thread overview]
Message-ID: <CALe+Z02=wKpjadYrA6JUHaoG5WH=MG7Y581fFeTry7K0mbBL1Q@mail.gmail.com> (raw)
In-Reply-To: <3310c320-fa39-cd8c-ab77-ced20daa5073@nxp.com>
On Wed, Dec 14, 2016 at 6:12 AM, Shreyansh Jain <shreyansh.jain@nxp.com> wrote:
> On Wednesday 14 December 2016 03:54 AM, Jan Blunck wrote:
>>
>> On Tue, Dec 13, 2016 at 2:37 PM, Shreyansh Jain <shreyansh.jain@nxp.com>
>> wrote:
>>>
>>> From: Jan Blunck <jblunck@infradead.org>
>>>
>>> This macro is based on Jan Viktorin's original patch but also checks the
>>> type of the passed pointer against the type of the member.
>>>
>>> Signed-off-by: Jan Viktorin <viktorin@rehivetech.com>
>>> [shreyansh.jain@nxp.com: Fix checkpatch error]
>>> Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>
>>> [jblunck@infradead.org: add type checking and __extension__]
>>> Signed-off-by: Jan Blunck <jblunck@infradead.org>
>>>
>>> --
>>> v2:
>>> - fix checkpatch error
>>> ---
>>> lib/librte_eal/common/include/rte_common.h | 21 +++++++++++++++++++++
>>> 1 file changed, 21 insertions(+)
>>>
>>> diff --git a/lib/librte_eal/common/include/rte_common.h
>>> b/lib/librte_eal/common/include/rte_common.h
>>> index db5ac91..3eb8d11 100644
>>> --- a/lib/librte_eal/common/include/rte_common.h
>>> +++ b/lib/librte_eal/common/include/rte_common.h
>>> @@ -331,6 +331,27 @@ rte_bsf32(uint32_t v)
>>> #define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER)
>>> #endif
>>>
>>> +/**
>>> + * Return pointer to the wrapping struct instance.
>>> + *
>>> + * Example:
>>> + *
>>> + * struct wrapper {
>>> + * ...
>>> + * struct child c;
>>> + * ...
>>> + * };
>>> + *
>>> + * struct child *x = obtain(...);
>>> + * struct wrapper *w = container_of(x, struct wrapper, c);
>>> + */
>>> +#ifndef container_of
>>> +#define container_of(ptr, type, member) (__extension__ ({
>>> \
>>> + typeof(((type *)0)->member) * _ptr = (ptr); \
>>> + (type *)(((char *)_ptr) - offsetof(type,
>>> member));\
>>> + }))
>>
>>
>> This is a checkpatch false positive. It should be fine to ignore this.
>> IIRC we already discussed this before.
>
>
> I too thought something similar was discussed. I tried searching the
> archives but couldn't find anything - thus, I thought probably I was
> hallucinating :P
>
> So, you want me to revert back the '()' change? Does it impact the expansion
> of this macro?
We haven't added this on any other usage of the __extension__ keyword
in the existing code. From my perspective it is more consistent to
revert it.
Anyone else with an opinion here? David? Thomas?
>
>>
>>
>>> +#endif
>>> +
>>> #define _RTE_STR(x) #x
>>> /** Take a macro value and get a string version of it */
>>> #define RTE_STR(x) _RTE_STR(x)
>>> --
>>> 2.7.4
>>>
>>
>
next prev parent reply other threads:[~2016-12-16 8:14 UTC|newest]
Thread overview: 132+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-04 10:11 [dpdk-dev] [PATCH 00/13] Introducing EAL Bus-Device-Driver Model Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 01/13] eal: define container_of macro Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 02/13] eal/bus: introduce bus abstraction Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 03/13] test: add basic bus infrastructure tests Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 04/13] eal/bus: add scan and match support Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 05/13] eal/bus: add support for inserting a device on a bus Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 06/13] eal: integrate bus scan and probe with EAL Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 07/13] pci: replace probe and remove handlers with rte_driver Shreyansh Jain
2016-12-08 17:50 ` Ferruh Yigit
2016-12-09 4:59 ` Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 08/13] eal: enable probe and remove from bus infrastructure Shreyansh Jain
2016-12-06 10:45 ` Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 09/13] pci: split match and probe function Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 10/13] eal/pci: generalize args of PCI scan/match towards RTE device/driver Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 11/13] pci: Pass rte_pci_addr to functions instead of separate args Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 12/13] eal: enable PCI bus Shreyansh Jain
2016-12-04 10:11 ` [dpdk-dev] [PATCH 13/13] eal/pci: remove PCI probe and init calls Shreyansh Jain
2016-12-06 20:52 ` [dpdk-dev] [PATCH 00/13] Introducing EAL Bus-Device-Driver Model David Marchand
2016-12-07 9:55 ` Shreyansh Jain
2016-12-07 12:17 ` David Marchand
2016-12-07 13:10 ` Shreyansh Jain
2016-12-07 13:24 ` Thomas Monjalon
2016-12-08 5:04 ` Shreyansh Jain
2016-12-08 7:21 ` Thomas Monjalon
2016-12-08 7:53 ` Shreyansh Jain
2016-12-12 14:35 ` Jianbo Liu
2016-12-13 6:56 ` Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 00/12] " Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 01/12] eal: define container_of macro Shreyansh Jain
2016-12-13 22:24 ` Jan Blunck
2016-12-14 5:12 ` Shreyansh Jain
2016-12-16 8:14 ` Jan Blunck [this message]
2016-12-16 9:23 ` Adrien Mazarguil
2016-12-16 10:47 ` Jan Blunck
2016-12-16 11:21 ` Adrien Mazarguil
2016-12-16 11:54 ` Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 02/12] eal/bus: introduce bus abstraction Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 03/12] test: add basic bus infrastructure tests Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 04/12] eal/bus: add scan, match and insert support Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 05/12] eal: integrate bus scan and probe with EAL Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 06/12] eal: add probe and remove support for rte_driver Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 07/12] eal: enable probe from bus infrastructure Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 08/12] pci: split match and probe function Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 09/12] eal/pci: generalize args of PCI scan/match towards RTE device/driver Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 10/12] pci: Pass rte_pci_addr to functions instead of separate args Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 11/12] eal: enable PCI bus Shreyansh Jain
2016-12-13 13:37 ` [dpdk-dev] [PATCH v2 12/12] drivers: update PMDs to use rte_driver probe and remove Shreyansh Jain
2016-12-13 13:52 ` Andrew Rybchenko
2016-12-13 15:07 ` Ferruh Yigit
2016-12-14 5:14 ` Shreyansh Jain
2016-12-14 5:11 ` Shreyansh Jain
2016-12-14 9:49 ` Shreyansh Jain
2016-12-15 21:36 ` Jan Blunck
2016-12-26 9:14 ` Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 00/12] Introducing EAL Bus-Device-Driver Model Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 01/12] eal: define container_of macro Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 02/12] eal/bus: introduce bus abstraction Shreyansh Jain
2016-12-20 12:37 ` Hemant Agrawal
2016-12-20 13:17 ` Jan Blunck
2016-12-20 13:51 ` Shreyansh Jain
2016-12-20 17:11 ` Stephen Hemminger
2016-12-21 7:11 ` Shreyansh Jain
2016-12-21 15:38 ` Jan Blunck
2016-12-21 23:33 ` Stephen Hemminger
2016-12-22 5:12 ` Shreyansh Jain
2016-12-22 5:52 ` Shreyansh Jain
2016-12-25 17:39 ` Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 03/12] test: add basic bus infrastructure tests Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 04/12] eal/bus: add scan, match and insert support Shreyansh Jain
2016-12-16 13:25 ` Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 05/12] eal: integrate bus scan and probe with EAL Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 06/12] eal: add probe and remove support for rte_driver Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 07/12] eal: enable probe from bus infrastructure Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 08/12] pci: split match and probe function Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 09/12] eal/pci: generalize args of PCI scan/match towards RTE device/driver Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 10/12] pci: Pass rte_pci_addr to functions instead of separate args Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 11/12] eal: enable PCI bus and PCI test framework Shreyansh Jain
2016-12-16 13:20 ` Shreyansh Jain
2016-12-16 13:10 ` [dpdk-dev] [PATCH v3 12/12] drivers: update PMDs to use rte_driver probe and remove Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 00/12] Introducing EAL Bus-Device-Driver Model Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 01/12] eal/bus: introduce bus abstraction Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 02/12] test: add basic bus infrastructure tests Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 03/12] eal/bus: add scan, match and insert support Shreyansh Jain
2016-12-26 13:27 ` Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 04/12] eal: integrate bus scan and probe with EAL Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 05/12] eal: add probe and remove support for rte_driver Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 06/12] eal: enable probe from bus infrastructure Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 07/12] pci: split match and probe function Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 08/12] eal/pci: generalize args of PCI scan/match towards RTE device/driver Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 09/12] pci: Pass rte_pci_addr to functions instead of separate args Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 10/12] eal: enable PCI bus and PCI test framework Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 11/12] drivers: update PMDs to use rte_driver probe and remove Shreyansh Jain
2016-12-26 12:50 ` [dpdk-dev] [PATCH v4 12/12] eal/bus: add bus iteration macros Shreyansh Jain
2016-12-26 13:23 ` [dpdk-dev] [PATCH v5 00/12] Introducing EAL Bus-Device-Driver Model Shreyansh Jain
2016-12-26 13:23 ` [dpdk-dev] [PATCH v5 01/12] eal/bus: introduce bus abstraction Shreyansh Jain
2017-01-03 21:52 ` Thomas Monjalon
2017-01-06 10:31 ` Shreyansh Jain
2017-01-06 14:55 ` Thomas Monjalon
2017-01-09 6:24 ` Shreyansh Jain
2017-01-09 15:22 ` Ferruh Yigit
2017-01-10 4:07 ` Shreyansh Jain
2016-12-26 13:23 ` [dpdk-dev] [PATCH v5 02/12] test: add basic bus infrastructure tests Shreyansh Jain
2016-12-26 13:23 ` [dpdk-dev] [PATCH v5 03/12] eal/bus: add scan, match and insert support Shreyansh Jain
2016-12-26 13:23 ` [dpdk-dev] [PATCH v5 04/12] eal: integrate bus scan and probe with EAL Shreyansh Jain
2017-01-03 21:46 ` Thomas Monjalon
2017-01-06 10:38 ` Shreyansh Jain
2017-01-06 12:00 ` Shreyansh Jain
2017-01-06 13:46 ` Thomas Monjalon
2017-01-09 6:35 ` Shreyansh Jain
2017-01-08 12:21 ` Rosen, Rami
2017-01-09 6:34 ` Shreyansh Jain
2016-12-26 13:23 ` [dpdk-dev] [PATCH v5 05/12] eal: add probe and remove support for rte_driver Shreyansh Jain
2017-01-03 22:05 ` Thomas Monjalon
2017-01-06 11:44 ` Shreyansh Jain
2017-01-06 15:26 ` Thomas Monjalon
2017-01-09 6:28 ` Shreyansh Jain
2016-12-26 13:23 ` [dpdk-dev] [PATCH v5 06/12] eal: enable probe from bus infrastructure Shreyansh Jain
2016-12-26 13:24 ` [dpdk-dev] [PATCH v5 07/12] pci: split match and probe function Shreyansh Jain
2017-01-03 22:08 ` Thomas Monjalon
2016-12-26 13:24 ` [dpdk-dev] [PATCH v5 08/12] eal/pci: generalize args of PCI scan/match towards RTE device/driver Shreyansh Jain
2017-01-03 22:13 ` Thomas Monjalon
2017-01-06 12:03 ` Shreyansh Jain
2016-12-26 13:24 ` [dpdk-dev] [PATCH v5 09/12] pci: Pass rte_pci_addr to functions instead of separate args Shreyansh Jain
2016-12-26 13:24 ` [dpdk-dev] [PATCH v5 10/12] eal: enable PCI bus and PCI test framework Shreyansh Jain
2016-12-26 13:24 ` [dpdk-dev] [PATCH v5 11/12] drivers: update PMDs to use rte_driver probe and remove Shreyansh Jain
2017-01-09 15:19 ` Ferruh Yigit
2017-01-09 16:18 ` Ferruh Yigit
2017-01-10 4:09 ` Shreyansh Jain
2016-12-26 13:24 ` [dpdk-dev] [PATCH v5 12/12] eal/bus: add bus iteration macros Shreyansh Jain
2017-01-03 22:15 ` Thomas Monjalon
2017-01-03 22:22 ` [dpdk-dev] [PATCH v5 00/12] Introducing EAL Bus-Device-Driver Model Thomas Monjalon
2017-01-06 6:27 ` Shreyansh Jain
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