On Mon, Jul 16, 2012 at 4:52 PM, Aft nix <aftnix@xxxxxxxxx> 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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