osdep: Make qemu_madvise() to set errno in all cases

The unspoken premise of qemu_madvise() is that errno is set on
error. And it is mostly the case except for posix_madvise() which
is documented to return either zero (on success) or a positive
error number. This means, we must set errno ourselves. And while
at it, make the function return a negative value on error, just
like other error paths do.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-ID: <af17113e7c1f2cc909ffd36d23f5a411b63b8764.1717584048.git.mprivozn@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

0 files changed, 0 insertions, 0 deletions