Messages in this thread | | | Date | Wed, 20 Jul 2016 09:09:01 +0800 | From | Fengguang Wu <> | Subject | Re: [kbuild-all] drivers/virtio/virtio_balloon.o: warning: objtool: release_pages_balloon()+0x98: function has unreachable instruction |
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Hi Cornelia, Michael,
Sorry please ignore this one -- it looks like false warning from old gcc 4.4 and 4.6 -- we just enabled old compiler tests triggered thousands of these warnings..
Thanks, Fengguang
On Wed, Jul 20, 2016 at 01:33:15AM +0800, kbuild test robot wrote: >tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master >head: 47ef4ad2684d380dd6d596140fb79395115c3950 >commit: 87c9403b0d1de4676b0bd273eea68fcf6de68e68 virtio_balloon: fix PFN format for virtio-1 >date: 8 weeks ago >config: x86_64-randconfig-a0-07191719 (attached as .config) >compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7 >reproduce: > git checkout 87c9403b0d1de4676b0bd273eea68fcf6de68e68 > # save the attached .config to linux build tree > make ARCH=x86_64 > >All warnings (new ones prefixed by >>): > > drivers/virtio/virtio_balloon.c: In function 'update_balloon_stats': > drivers/virtio/virtio_balloon.c:249: warning: 'events[2]' is used uninitialized in this function > drivers/virtio/virtio_balloon.c:251: warning: 'events[3]' is used uninitialized in this function > drivers/virtio/virtio_balloon.c:232: warning: 'events[12]' is used uninitialized in this function > drivers/virtio/virtio_balloon.c:239: note: 'events[12]' was declared here > drivers/virtio/virtio_balloon.c:232: warning: 'events[11]' is used uninitialized in this function > drivers/virtio/virtio_balloon.c:239: note: 'events[11]' was declared here >>> drivers/virtio/virtio_balloon.o: warning: objtool: release_pages_balloon()+0x98: function has unreachable instruction > >--- >0-DAY kernel test infrastructure Open Source Technology Center >https://lists.01.org/pipermail/kbuild-all Intel Corporation
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