Re: [PATCH 1/7] rust: file: add Rust abstraction for `struct file`

[Boqun Feng]

On Thu, Nov 30, 2023 at 11:42:26AM +0100, Peter Zijlstra wrote:
> On Wed, Nov 29, 2023 at 09:08:14AM -0800, Boqun Feng wrote:
> 
> > But but but, I then realized we have asm goto in C but Rust doesn't
> > support them, and I haven't thought through how hard tht would be..
> 
> You're kidding right?
> 

I'm not, but I've found this:

	https://github.com/Amanieu/rfcs/blob/inline-asm/text/0000-inline-asm.md#asm-goto

seems to me, the plan for this is something like below:

	asm!(
		"cmp {}, 42",
		"jeq {}",
		in(reg) val,
		label { println!("a"); },
		fallthrough { println!("b"); }
    	);

But it's not implemented yet. Cc Josh in case that he knows more about
this.

Regards,
Boqun

> I thought we *finally* deprecated all compilers that didn't support
> asm-goto and x86 now mandates asm-goto to build, and then this toy
> language comes around ?
> 
> What a load of crap ...