linux-kernel - Re: tools/virtio: Compile errors

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Message-ID: <CAEH94LiYeGoDAcboi9u1gna_v4cxL+Hc33cGL4ExMxtj+ss6qA@mail.gmail.com>
Date:	Mon, 9 Apr 2012 16:49:14 +0800
From:	Zhi Yong Wu <zwu.kernel@...il.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Dongsu Park <advance38@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: tools/virtio: Compile errors

On Mon, Apr 9, 2012 at 3:55 PM, Michael S. Tsirkin <mst@...hat.com> wrote:
> On Mon, Apr 09, 2012 at 03:41:36PM +0800, Zhi Yong Wu wrote:
>> On Mon, Apr 9, 2012 at 3:33 PM, Michael S. Tsirkin <mst@...hat.com> wrote:
>> > On Mon, Apr 09, 2012 at 02:02:53PM +0800, Zhi Yong Wu wrote:
>> >> On Thu, Feb 9, 2012 at 12:47 AM, Michael S. Tsirkin <mst@...hat.com> wrote:
>> >> > On Wed, Feb 08, 2012 at 05:04:05PM +0100, Dongsu Park wrote:
>> >> >> Hi,
>> >> >>
>> >> >> there are compile problems under tools/virtio.
>> >> >> If I simply run make,
>> >> >>
>> >> >> ~/linuxsrc/linux-3.2/tools/virtio $ make
>> >> >> gcc -g -O2 -Wall -I. -I ../../usr/include/ -Wno-pointer-sign
>> >> >> -fno-strict-overflow  -MMD   -c -o virtio_ring.o
>> >> >> ../../drivers/virtio/virtio_ring.c
>> >> >> ../../drivers/virtio/virtio_ring.c:24:26: fatal error: linux/module.h:
>> >> >> No such file or directory
>> >> >> compilation terminated.
>> >> >> make: *** [virtio_ring.o] Error 1
>> >> >
>> >> >
>> >> >> By the way, my system is Ubuntu 11.10 with Kernel 3.2.
>> >> >>
>> >> >> Cheers,
>> >> >> Dongsu
>> >> >
>> >> > This patch is missing - I'll put it upstream.
>> >> >
>> >> > --->
>> >> >
>> >> > tools/virtio: add module.h stub
>> >> >
>> >> > make it build with linux 3.2
>> >> >
>> >> > Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
>> >> >
>> >> > diff --git a/tools/virtio/linux/module.h b/tools/virtio/linux/module.h
>> >> > new file mode 100644
>> >> > index 0000000..96868eb
>> >> > --- /dev/null
>> >> > +++ b/tools/virtio/linux/module.h
>> >> > @@ -0,0 +1,3 @@
>> >> > +#ifndef LINUX_MODULE_H
>> >> > +#define LINUX_MODULE_H
>> >> > +#endif
>> >> After the patch was applied in my env, i met another issue.
>> >> [root@f15 virtio]# make test
>> >> cc -g -O2 -Wall -I. -I ../../usr/include/ -Wno-pointer-sign
>> >> -fno-strict-overflow  -MMD   -c -o virtio_ring.o
>> >> ../../drivers/virtio/virtio_ring.c
>> >> ../../drivers/virtio/virtio_ring.c: In function \u2018virtqueue_add_buf\u2019:
>> >> ../../drivers/virtio/virtio_ring.c:277:2: warning: implicit
>> >> declaration of function \u2018wmb\u2019
>> >> [-Wimplicit-function-declaration]
>> >> ../../drivers/virtio/virtio_ring.c: In function \u2018virtqueue_get_buf\u2019:
>> >> ../../drivers/virtio/virtio_ring.c:437:2: warning: implicit
>> >> declaration of function \u2018rmb\u2019
>> >> [-Wimplicit-function-declaration]
>> >> cc   virtio_test.o virtio_ring.o   -o virtio_test
>> >> virtio_ring.o: In function `virtqueue_add_buf':
>> >> /home/zwu/work/kernel/vhost-scsi/tools/virtio/../../drivers/virtio/virtio_ring.c:277:
>> >> undefined reference to `wmb'
>> >> virtio_ring.o: In function `virtqueue_get_buf':
>> >> /home/zwu/work/kernel/vhost-scsi/tools/virtio/../../drivers/virtio/virtio_ring.c:437:
>> >> undefined reference to `rmb'
>> >> collect2: ld returned 1 exit status
>> >> make: *** [virtio_test] Error 1
>> >
>> > On which kernel version does this trigger?
>> [root@f15 linux-2.6]# git log
>> commit e22057c8599373e5caef0bc42bdb95d2a361ab0d
>> Merge: 496b919 df7a3ee
>> Author: Linus Torvalds <torvalds@...ux-foundation.org>
>> Date:   Sat Mar 24 12:20:25 2012 -0700
>
> Update to 3.4-rc2 and most of the issues go away
> (there's still a build breakage with a missing
> flag to dev_cleanup, I'm fixing this up for now
> you can just pass false).
thanks.
By the way,  what does it mean as below?
[root@f15 virtio]# ./virtio_test
spurious wakeus: 0x4
[root@f15 virtio]# ./virtio_test -h
Usage: virtio_test [--help] [--no-indirect] [--no-event-idx]
spurious wakeus: 0x2
[root@f15 virtio]# ./virtio_test --no-indirect
spurious wakeus: 0x4
[root@f15 virtio]# ./virtio_test --no-event-idx
spurious wakeus: 0x7
[root@f15 virtio]# ./virtio_test
spurious wakeus: 0x5
[root@f15 virtio]# ./virtio_test
spurious wakeus: 0x2
[root@f15 virtio]# ./virtio_test
spurious wakeus: 0x3
[root@f15 virtio]# ./virtio_test
spurious wakeus: 0x5
[root@f15 virtio]# ./virtio_test
spurious wakeus: 0x4


>



-- 
Regards,

Zhi Yong Wu
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