using #define preprocessor

[TongEng Chiah <techiah@yahoo.com>]

i read through some kernel codes and notice the use of
#define

i was wondering whether i can made use of it in the
way described below

i want to write a module called MYMODULE
in this module i define: #define mymodule

so in the kernel codes, i want to add in some
conditions

#ifdef mymodule
   blah
   blah
#endif

the codes will only be run if MYMODULE has been loaded
else, the codes won't run.

is what i described above possible?
how can it be done?

Thanks

 

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