drop_monitor: convert to modular building

When I first wrote drop monitor I wrote it to just build monolithically.  There
is no reason it can't be built modularly as well, so lets give it that
flexibiity.

I've tested this by building it as both a module and monolithically, and it
seems to work quite well

Change notes:

v2)
* fixed for_each_present_cpu loops to be more correct as per Eric D.
* Converted exit path failures to BUG_ON as per Ben H.

v3)
* Converted del_timer to del_timer_sync to close race noted by Ben H.

Signed-off-by: Neil Horman <[email protected]>
CC: "David S. Miller" <[email protected]>
CC: Eric Dumazet <[email protected]>
CC: Ben Hutchings <[email protected]>
Reviewed-by: Ben Hutchings <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Neil Horman 2012-05-17 10:04:00 +00:00 • committed by David S. Miller
commit cad456d5ab
2 changed files with 45 additions and 3 deletions

View file

@ -296,7 +296,7 @@ config NET_TCPPROBE
module will be called tcp_probe.
config NET_DROP_MONITOR
boolean "Network packet drop alerting service"
tristate "Network packet drop alerting service"
depends on INET && EXPERIMENTAL && TRACEPOINTS
---help---
This feature provides an alerting service to userspace in the