On Mon, Jul 16, 2012 at 4:52 PM, Aft nix [off-list ref] wrote:

Hi,

The macro expansion of __read_mostly :

#define __read_mostly __attribute__((__section__(".data..read_mostly"))

This one is from cache.h

__init:
#define __init          __section(.init.text) __cold notrace

from init.h

__exit:

#define __exit          __section(.exit.text) __exitused __cold notrace

After searching through net i have not found any good explanation of
what is happening there.

Additonal question : I have heard about various "linker magic"
employed in kernel development. Any information
regarding this will be wonderful.

cheers

--
-aft

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Using __init means the function code will be removed - saving RAM space
i.e., one cannot call the function declared with __init once the
initialization is done. I just know the meaning but I am not sure of how it
works. This may provide some info on your question even though it did not
answer your question.

Hope this Helps,
Sannu K
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