Re: [RFC PATCH] bit_spinlock: introduce smp_cond_load_relaxed

[Gao Xiang]

On 2018/10/13 15:22, Gao Xiang wrote:
> For other architectures like x86/arm64, I think they could implement
> smp_cond_load_* later.

Sorry about that, I mean "amd64".

Actually I don't have performance numbers to proof that now. I think
it really depends on the detailed architecture hardware implementation.

In my opinion, I just think it is better to wrap it up rather than
do open-coded all around...
do {
  cpu_relax()
} while(...);

I was just cleaning up EROFS file system, and saw these piece of code
(bit_spinlock) by chance. Therefore I write a patch to get some idea
about it....

Thanks,
Gao Xiang