Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

Fix race condition that can cause a crash at startup.

# -----BEGIN PGP SIGNATURE-----
#
# iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmQsVJoUHHBib256aW5p
# QHJlZGhhdC5jb20ACgkQv/vSX3jHroPnWgf/SRc2eAtWtLDkIhjszkfK8TVeQzzS
# wD0pobk/8MNyj+EW/wV+/HsR3U8oNvHsAnzB4+RKd7YGhPxHwDvqC+hNm5HS8u4g
# gY+LhvwirFB7RkP0dDd4yt1BX6emylyFjUpM+QxlrwuorQ5wfRaIh77ex349rnq8
# fp8Kw53VpBWscyp3S3AYlQMRN3NGPH9JdeDtWap0AHFGA+PeBR2VCOuJ3xUJF62T
# xyacGGe3JXNUcFJVKR8PMDBO1FeJgl4Y7k0idHK/mcpOPj6HYFN3EV863XdP8Foa
# mv9h2DXRuIpFJEj//0GQAVDw+F8BFofjZaPeRNAoX+oE3I4CnZhVC5uG/w==
# =Ttdf
# -----END PGP SIGNATURE-----
# gpg: Signature made Tue 04 Apr 2023 17:47:22 BST
# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* tag 'for-upstream' of https://gitlab.com/bonzini/qemu:
  kvm: dirty-ring: Fix race with vcpu creation

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>