linux-kernel - Re: [PATCH 2/7] ipc: fix trivial warning

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Date:	Mon, 19 Oct 2009 17:50:21 +0300
From:	Felipe Contreras <felipe.contreras@...il.com>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	linux-kernel@...r.kernel.org,
	Heiko Carstens <heiko.carstens@...ibm.com>
Subject: Re: [PATCH 2/7] ipc: fix trivial warning

On Mon, Oct 19, 2009 at 5:12 PM, Jiri Kosina <jkosina@...e.cz> wrote:
> On Mon, 19 Oct 2009, Felipe Contreras wrote:
>
>> Commit a0d092f introduced the following warning:
>> ipc/msg.c: In function ?msgctl_down?:
>> ipc/msg.c:415: warning: ?msqid64? may be used uninitialized in this function
>>
>> Signed-off-by: Felipe Contreras <felipe.contreras@...il.com>
>> ---
>>  ipc/msg.c |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/ipc/msg.c b/ipc/msg.c
>> index 2ceab7f..085bd58 100644
>> --- a/ipc/msg.c
>> +++ b/ipc/msg.c
>> @@ -412,7 +412,7 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,
>>                      struct msqid_ds __user *buf, int version)
>>  {
>>       struct kern_ipc_perm *ipcp;
>> -     struct msqid64_ds msqid64;
>> +     struct msqid64_ds uninitialized_var(msqid64);
>>       struct msg_queue *msq;
>>       int err;
>
> What gcc are you using? I am not getting any warning at least with gcc
> "(SUSE Linux) 4.3.1 20080507 (prerelease) [gcc-4_3-branch revision
> 135036]"

gcc (GCC) 4.4.1 20090725 (Red Hat 4.4.1-2)

Since I moved to Fedora 11 I get more warnings than other people,
possibly because gcc 4.4.

-- 
Felipe Contreras
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