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
---
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