How to find macro defination in source code ?

[Michael Ellerman]

On Sat, 2010-06-19 at 00:47 +0800, wilbur.chan wrote:
> For example, a macro in serial driver 8250.c , SERIAL_PORT_DFNS ,I
> can't find where it is implement.

It looks to be in 8250.c, so I don't know why you can't find it.

> Is there any solutions to find a macro defination in code ?

# make tags
# vi -t SERIAL_PORT_DFNS

Or in general:
http://ctags.sourceforge.net/

cheers
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