Re: [RFC] gcc feature request: Moving blocks into sections

From: H. Peter Anvin
Date: Mon Aug 05 2013 - 14:34:09 EST

On 08/05/2013 11:20 AM, Linus Torvalds wrote:
> Of course, it would be good to optimize static_key_false() itself -
> right now those static key jumps are always five bytes, and while they
> get nopped out, it would still be nice if there was some way to have
> just a two-byte nop (turning into a short branch) *if* we can reach
> another jump that way..For small functions that would be lovely. Oh
> well.

That would definitely require gcc support. It would be useful, but
probably requires a lot of machinery.


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