tap: Remove unnecessary global tun_ns_fd

tap_ns_tun(), which runs in an ephemeral thread puts the fd it opens into
the global variable tun_ns_fd to communicate it back to the main thread
in tap_sock_tun_init().

However, the only thing tap_sock_tun_init() does with it is copies it to
c->fd_tap and everything else uses it from there.  tap_ns_tun() already
has access to the context structure, so we might as well store the value
directly in there rather than having a global as an intermediate.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

0 files changed, 0 insertions, 0 deletions