[PATCH 00/19] -Werror=maybe-uninitialized fixes

[marcandre . lureau]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Hi,

Depending on -Doptimization=<value>, GCC (13.2.1 here) produces different
maybe-uninitialized warnings:
- g: produces -Werror=maybe-uninitialized errors
- 0: clean build
- 1: produces -Werror=maybe-uninitialized errors
- 2: clean build
- 3: produces few -Werror=maybe-uninitialized errors
- s: produces -Werror=maybe-uninitialized errors

Most are false-positive, because prior LOCK_GUARD should guarantee an
initialization path. Few of them are a bit trickier. Finally, I found
a potential related memory leak.

thanks

Marc-André Lureau (19):
  util/coroutine: fix -Werror=maybe-uninitialized false-positive
  util/timer: with -Werror=maybe-uninitialized false-positive
  hw/qxl: fix -Werror=maybe-uninitialized false-positives
  nbd: with -Werror=maybe-uninitialized false-positive
  block/mirror: fix -Werror=maybe-uninitialized false-positive
  block/stream: fix -Werror=maybe-uninitialized false-positives
  hw/ahci: fix -Werror=maybe-uninitialized false-positive
  hw/vhost-scsi: fix -Werror=maybe-uninitialized
  hw/sdhci: fix -Werror=maybe-uninitialized false-positive
  hw/rdma: fix -Werror=maybe-uninitialized false-positive
  migration/block: fix -Werror=maybe-uninitialized false-positive
  migration: fix -Werror=maybe-uninitialized false-positives
  hw/virtio-blk: fix -Werror=maybe-uninitialized false-positive
  plugins: fix -Werror=maybe-uninitialized false-positive
  migration: fix -Werror=maybe-uninitialized false-positive
  tests: fix -Werror=maybe-uninitialized
  hw/nvme: fix -Werror=maybe-uninitialized
  hw/virtio: fix -Werror=maybe-uninitialized
  RFC: hw/virtio: a potential leak fix

 block/mirror.c                     | 2 +-
 block/stream.c                     | 6 +++---
 hw/block/virtio-blk.c              | 2 +-
 hw/display/qxl.c                   | 4 ++--
 hw/ide/ahci.c                      | 3 ++-
 hw/nvme/ctrl.c                     | 2 +-
 hw/rdma/rdma_backend.c             | 2 +-
 hw/scsi/vhost-scsi.c               | 2 +-
 hw/sd/sdhci.c                      | 2 +-
 hw/virtio/vhost-shadow-virtqueue.c | 6 ++++--
 migration/block.c                  | 2 +-
 migration/dirtyrate.c              | 4 ++--
 migration/migration.c              | 2 +-
 migration/ram.c                    | 2 +-
 nbd/client-connection.c            | 2 +-
 plugins/loader.c                   | 2 +-
 tests/unit/test-bdrv-drain.c       | 2 +-
 tests/unit/test-block-iothread.c   | 2 +-
 util/qemu-coroutine.c              | 2 +-
 util/qemu-timer.c                  | 6 +++---
 20 files changed, 30 insertions(+), 27 deletions(-)

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2.44.0