DPDK patches and discussions
 help / color / mirror / Atom feed
From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Marc Sune <marc.sune@bisdn.de>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] KNI: fix compilation warning 'missing-field-initializers'
Date: Wed, 22 Oct 2014 12:00:46 +0200
Message-ID: <1818029.CqCeQSHIe6@xps13> (raw)
In-Reply-To: <54477DBD.1090701@bisdn.de>

2014-10-22 11:49, Marc Sune:
> On 22/10/14 10:50, Thomas Monjalon wrote:
> > 2014-10-22 10:42, Marc Sune:
> >> The mutex needs to be initialized to RTE_SPINLOCK_INITIALIZER(0) too, or
> >> move the initialization of the mutex to rte_kni_init().
> > RTE_SPINLOCK_INITIALIZER is { 0 }
> > By initializing one field, all other fields are set to 0, so spinlock also.
> > Just choose one field and it's OK.
> > It should be tested with ICC also but I think it's OK.
> 
> Seems that you are right, at least for C99:
> 
>     C99 Standard 6.7.8.21
> 
>          If there are fewer initializers in a brace-enclosed list than
>     there are elements or members of an aggregate, or fewer characters
>     in a string literal used to initialize an array of known size than
>     there are elements in the array, the remainder of the aggregate
>     shall be initialized implicitly the same as objects that have static
>     storage duration.
> 
> 
> I am not sure if there can be problems with other C dialects (e.g. C11), 
> I don't have the std here. So to prevent any problem with them (could 
> produce a dead-lock during first rte_kni_alloc() that could be difficult 
> to troubleshoot), I would still explicitly initialize the mutex, in one 
> or the other way.
> 
> Just tell me if you agree and which one you prefer.

No problem for initializing mutex.

> I don't have an ICC license. I am always trying it with GCC and clang.

That's why it's the Intel job to support ICC in DPDK :)

-- 
Thomas

  parent reply	other threads:[~2014-10-22  9:52 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-17 22:51 [dpdk-dev] [PATCH v4] KNI: use a memzone pool for KNI alloc/release Marc Sune
2014-10-21  4:57 ` Zhang, Helin
2014-10-21  8:29 ` Thomas Monjalon
2014-10-21 10:52   ` Marc Sune
2014-10-22  5:51     ` Liu, Jijiang
2014-10-22  7:10       ` [dpdk-dev] [PATCH] KNI: fix compilation warning 'missing-field-initializers' Marc Sune
2014-10-22  7:14         ` Marc Sune
2014-10-22  8:11         ` Liu, Jijiang
2014-10-22  8:37         ` Thomas Monjalon
2014-10-22  8:42           ` Marc Sune
2014-10-22  8:50             ` Thomas Monjalon
2014-10-22  9:49               ` Marc Sune
2014-10-22  9:59                 ` Richardson, Bruce
2014-10-22 10:00                 ` Thomas Monjalon [this message]
2014-10-22 10:23                   ` [dpdk-dev] [PATCH v2] " Marc Sune
2014-10-22 10:35                     ` Thomas Monjalon

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1818029.CqCeQSHIe6@xps13 \
    --to=thomas.monjalon@6wind.com \
    --cc=dev@dpdk.org \
    --cc=marc.sune@bisdn.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

DPDK patches and discussions

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://inbox.dpdk.org/dev/0 dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dev dev/ https://inbox.dpdk.org/dev \
		dev@dpdk.org
	public-inbox-index dev

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git