From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Olivier Matz <olivier.matz@6wind.com>,
dev@dpdk.org, Jingjing Wu <jingjing.wu@intel.com>,
Beilei Xing <beilei.xing@intel.com>
Subject: Re: [dpdk-dev] [PATCH 04/10] net/i40e: fix compilation with -Og
Date: Fri, 6 Oct 2017 00:24:48 +0100 [thread overview]
Message-ID: <bd0de0a4-0de6-56b0-9bdc-e3252f4e5f77@intel.com> (raw)
In-Reply-To: <20170911151333.5727-5-olivier.matz@6wind.com>
On 9/11/2017 4:13 PM, Olivier Matz wrote:
> The compilation with gcc-6.3.0 and EXTRA_CFLAGS=-Og gives the following
> error:
>
> CC i40e_adminq.o
> i40e_adminq.c: In function ‘i40e_clean_arq_element’:
> i40e_adminq.c:1145:56: error: ‘ntu’ may be used uninitialized in
> this function [-Werror=maybe-uninitialized]
> *pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc);
> ~~~~~^~~~~~
>
> Depending on what is defined, ntu actually be used without being
> initialized. Fix it by initializing it to 0, despite this is probably
> not the proper fix. Moreover, the error is located in base/ directory,
> which contains driver code common to several platforms (not only dpdk).
This practically seems false positive because driver makefile hard-coded
both defines.
Also ntu used before this location, not sure warning generated for here.
Overall I am for fixing the compile warning, but for decision maintainer
cc'ed because this being base code update requires maintainer
communicate other channels to reflect update into base code.
>
> Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
> ---
> drivers/net/i40e/base/i40e_adminq.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/i40e/base/i40e_adminq.c b/drivers/net/i40e/base/i40e_adminq.c
> index 8cc8c5eca..27c133323 100644
> --- a/drivers/net/i40e/base/i40e_adminq.c
> +++ b/drivers/net/i40e/base/i40e_adminq.c
> @@ -1047,7 +1047,7 @@ enum i40e_status_code i40e_clean_arq_element(struct i40e_hw *hw,
> u16 desc_idx;
> u16 datalen;
> u16 flags;
> - u16 ntu;
> + u16 ntu = 0;
>
> /* pre-clean the event info */
> i40e_memset(&e->desc, 0, sizeof(e->desc), I40E_NONDMA_MEM);
>
next prev parent reply other threads:[~2017-10-05 23:24 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-11 15:13 [dpdk-dev] [PATCH 00/10] " Olivier Matz
2017-09-11 15:13 ` [dpdk-dev] [PATCH 01/10] net/bnxt: " Olivier Matz
2017-09-11 15:13 ` [dpdk-dev] [PATCH 02/10] net/qede: " Olivier Matz
2017-09-11 18:22 ` Patil, Harish
2017-09-11 15:13 ` [dpdk-dev] [PATCH 03/10] net/virtio: " Olivier Matz
2017-10-05 23:17 ` Ferruh Yigit
2017-10-05 23:28 ` Ferruh Yigit
2017-10-06 6:43 ` Maxime Coquelin
2017-10-06 18:43 ` Ferruh Yigit
2017-09-11 15:13 ` [dpdk-dev] [PATCH 04/10] net/i40e: " Olivier Matz
2017-10-05 23:24 ` Ferruh Yigit [this message]
2017-10-11 6:20 ` Wu, Jingjing
2017-10-11 7:52 ` Olivier MATZ
2017-09-11 15:13 ` [dpdk-dev] [PATCH 05/10] uio: " Olivier Matz
2017-09-11 15:13 ` [dpdk-dev] [PATCH 06/10] cmdline: " Olivier Matz
2017-09-11 15:13 ` [dpdk-dev] [PATCH 07/10] metrics: " Olivier Matz
2017-09-11 15:13 ` [dpdk-dev] [PATCH 08/10] lpm6: " Olivier Matz
2017-10-06 0:18 ` Ferruh Yigit
2017-10-26 10:42 ` Bruce Richardson
2017-10-26 18:54 ` Ferruh Yigit
2017-09-11 15:13 ` [dpdk-dev] [PATCH 09/10] app/test-crypto-perf: fix memory leak Olivier Matz
2017-10-05 9:29 ` De Lara Guarch, Pablo
2017-09-11 15:13 ` [dpdk-dev] [PATCH 10/10] app/test-crypto-perf: fix compilation with -Og Olivier Matz
2017-10-05 9:36 ` De Lara Guarch, Pablo
2017-09-11 15:28 ` [dpdk-dev] [PATCH 00/10] " Bruce Richardson
2017-10-06 0:26 ` Ferruh Yigit
2017-10-06 7:31 ` Olivier MATZ
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