Turning off some or all kernel log messages

[Andrew Barr]

When I am connected wirelessly for any significant length of time to my HostAP 
box, the kernel logs are filled with messages like these:

wifi0: STA 00:0d:88:51:61:3a TX rate lowered to 20

Sometimes those messages are all that's output by dmesg. Is there any way to 
quiet down the verbosity of HostAP logging? I looked for both a module 
parameter and a Makefile option, but I couldn't find any way to change the 
verbosity of logging.

Andrew