On Thu, 27 Jun 2024 19:38:06 +0200
Oleg Nesterov [off-list ref] wrote:

...

 > > > +arch_initcall(check_emit_break);
 > > > +
 > >
 > > I wouldn't even bother with this, but whatever.
 >
 > Agreed, this looks a bit ugly. I did this only because I can not test
 > this (hopefully trivial) patch and the maintainers didn't reply.

The LoongArch maintainer Huacai told me offline to reply this thread today.

 > If LoongArch boots at least once with this change, this run-time check
 > can be removed.

I will test it next Monday.

 > And just in case... I didn't dare to make a more "generic" change, but
 > perhaps KPROBE_BP_INSN and KPROBE_SSTEPBP_INSN should be redefined the
 > same way for micro-optimization. In this case __emit_break() should be
 > probably moved into arch/loongarch/include/asm/inst.h.

Yeah. I think so too.

Thanks,
Tiezhu