Messages in this thread | | | Date | Fri, 9 Apr 2021 23:39:49 +0200 | From | Peter Zijlstra <> | Subject | Re: static_branch/jump_label vs branch merging |
| |
On Fri, Apr 09, 2021 at 05:07:15PM -0400, David Malcolm wrote:
> You've built a very specific thing out of asm-goto to fulfil the tough > requirements you outlined above - as well as the nops, there's a thing > in another section to contend with. > > How to merge these asm-goto constructs?
By calling the function less, you emit less of them. Which then brings us back to the whole pure/const thing.
> Doing so feels very special-case to the kernel and not something that > other GCC users would find useful.
Doesn't it boil down to 'fixing' the pure/const vs asm-goto interaction? I could imagine that having that interaction fixed could allow other creative uses.
| |