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Date: Thu, 25 Jan 2024 14:10:25 -0500
From: Rich Felker <>
To: "Ignotas \"gns\" WANG" <>
Cc: "" <>
Subject: Re: [PATCH] riscv: correct symbol version of

On Thu, Jan 25, 2024 at 02:05:34PM -0500, Rich Felker wrote:
> On Thu, Jan 25, 2024 at 04:55:16PM +0000, Ignotas "gns" WANG wrote:
> > Hi,
> > 
> > I'm porting LuaJIT to RISC-V, our binary built with musl would
> > occasionally SIGILL at patched JIT insns. It looks that musl's
> > __riscv_flush_icache is faulty, which may be the cause of this cache
> > coherency issue.
> > 
> > For the patch, see the attachments.
> > 
> > Since I'm not a subscriber to the musl list, CC me please.
> Just to be clear, this was always wrong, not a change on the kernel
> side where either symbol version might be seen depending on kernel
> version, right?

OK, answering my own question. The original Linux commit introducing
riscv vdso, e2c0cdfba7f69925afc92b20cd9835d81e11a4f1, has:

+       LINUX_4.15 {

and 921ebd8f2c081b3cf6c3b29ef4103eef3ff26054 adds
__riscv_flush_icache under that. So apparently the version was just
miscopied/typo when added to musl.

I'll apply this right away and it'll be in the upcoming release.


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