how can I find where is the macro or function deifined

[navych@126.com (Navy Cheng)]

On Tue, Jul 28, 2015 at 06:03:16PM +0200, Ahmed Soliman wrote:
> Hi;
> 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 .
> 
*make tags* in the root directory of the kernel tree. Then a file named TAGS
is created. TAGS is treated as one part of the tree when *git status*. You
can load it with Vim or emacs. Google it for details.