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| author | Bernhard Beschow | 2022-09-10 17:11:17 +0200 |
|---|---|---|
| committer | Laurent Vivier | 2022-09-29 21:07:39 +0200 |
| commit | ad9f958db5c48b9501905002a19e80b221dc7186 (patch) | |
| tree | 05e2561471d96798dec7bab0012f47b6f4532722 /hw/virtio | |
| parent | Merge tag 'pull-request-2022-09-28' of https://gitlab.com/thuth/qemu into sta... (diff) | |
| download | qemu-ad9f958db5c48b9501905002a19e80b221dc7186.tar.gz qemu-ad9f958db5c48b9501905002a19e80b221dc7186.tar.xz qemu-ad9f958db5c48b9501905002a19e80b221dc7186.zip | |
hw/virtio/vhost-shadow-virtqueue: Silence GCC error "maybe-uninitialized"
GCC issues a false positive warning, resulting in build failure with -Werror:
In file included from /usr/include/glib-2.0/glib.h:114,
from src/include/glib-compat.h:32,
from src/include/qemu/osdep.h:144,
from ../src/hw/virtio/vhost-shadow-virtqueue.c:10:
In function ‘g_autoptr_cleanup_generic_gfree’,
inlined from ‘vhost_handle_guest_kick’ at ../src/hw/virtio/vhost-shadow-virtqueue.c:292:42:
/usr/include/glib-2.0/glib/glib-autocleanups.h:28:3: error: ‘elem’ may be used uninitialized [-Werror=maybe-uninitialized]
28 | g_free (*pp);
| ^~~~~~~~~~~~
../src/hw/virtio/vhost-shadow-virtqueue.c: In function ‘vhost_handle_guest_kick’:
../src/hw/virtio/vhost-shadow-virtqueue.c:292:42: note: ‘elem’ was declared here
292 | g_autofree VirtQueueElement *elem;
| ^~~~
cc1: all warnings being treated as errors
There is actually no problem since "elem" is initialized in both branches.
Silence the warning by initializig it with "NULL".
$ gcc --version
gcc (GCC) 12.2.0
Fixes: 9c2ab2f1ec333be8614cc12272d4b91960704dbe ("vhost: stop transfer elem ownership in vhost_handle_guest_kick")
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220910151117.6665-1-shentey@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'hw/virtio')
| -rw-r--r-- | hw/virtio/vhost-shadow-virtqueue.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c index e8e5bbc368..596d4434d2 100644 --- a/hw/virtio/vhost-shadow-virtqueue.c +++ b/hw/virtio/vhost-shadow-virtqueue.c @@ -289,7 +289,7 @@ static void vhost_handle_guest_kick(VhostShadowVirtqueue *svq) virtio_queue_set_notification(svq->vq, false); while (true) { - g_autofree VirtQueueElement *elem; + g_autofree VirtQueueElement *elem = NULL; int r; if (svq->next_guest_avail_elem) { |