udp: Don't handle tap receive batch size calculation within a #define

UDP_MAX_FRAMES gives the maximum number of datagrams we'll ever handle as a
batch for sizing our buffers and control structures.  The subtly different
UDP_TAP_FRAMES gives the maximum number of datagrams we'll actually try to
receive at once for tap packets in the current configuration.

This depends on the mode, meaning that the macro has a non-obvious
dependency on the usual 'c' context variable being available.  We only use
it in one place, so it makes more sense to open code this.  Add an
explanatory comment while we're there.

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