migration/multifd: Remove p->quit from recv side

Like we did on the sending side, replace the p->quit per-channel flag
with a global atomic 'exiting' flag.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/r/20240220224138.24759-5-farosas@suse.de
Signed-off-by: Peter Xu <peterx@redhat.com>
1 file changed