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Re: [Qemu-devel] [PATCH qemu v18 4/5] vfio/spapr: Create DMA window dyna

From: Alexey Kardashevskiy
Subject: Re: [Qemu-devel] [PATCH qemu v18 4/5] vfio/spapr: Create DMA window dynamically (SPAPR IOMMU v2)
Date: Thu, 23 Jun 2016 14:55:32 +1000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1

On 23/06/16 13:59, Alexey Kardashevskiy wrote:

>> ret is not initialized and it is used in "fail:".
>> hw/vfio/common.c: In function ‘vfio_listener_region_add’:
>> hw/vfio/common.c:493:30: error: ‘ret’ may be used uninitialized in this
>> function [-Werror=maybe-uninitialized]
>>              container->error = ret;
> Oh. Thanks for reporting. I use cross gcc and there must be something I am
> doing wrong as I do not see these warnings but I do see them when compile
> with native compiler...

Ah, figured out - gcc -O2 enables the warning, and I always configure with
--enable-debug so gcc is not getting -O2. Will pay attention to this from
now on.


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