how can I find where is the macro or function deifined

Ahmed Soliman ahmedsoliman0x666 at
Tue Jul 28 12:03:16 EDT 2015

when I used libc I never memorized where each function is located
beyond the basics (for example I never knew if strlen is in string.h
or ctype.h or strlib.h )
I just check out the functions man pages by man strlen
is their such functionality for the kernel where I dont need to
memorize the dependencies for example if MODULE_LICENSE is in kernel.h
or module.h with out using the internel to google them .

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