Re: [trace:trace/core 16/16] WARNING: modpost: vmlinux: section mismatch in reference: trace_printk_init_buffers.part.0+0xc8 (section: .text.unlikely) -> initcall_level_names (section: .init.data)

On Thu, 30 Jul 2026 14:04:20 +0700
Woradorn Laodhanadhaworn <[email protected]> wrote:

> I reproduced this locally with commit
> `c33330b2ec170dd38b3284a72bc6a07a49cc9a65`, and it also reports:
> 
> WARNING: modpost: vmlinux: section mismatch in reference:
> trace_printk_init_buffers.part.0+0xc8 (section: .text.unlikely) ->
> initcall_level_names (section: .init.data)
> 
> Then I tried the same configuration and reproduction steps with the parent
> commit, `b6ccdca8d11c28338776811f0b9024d92c4bedb4`. It doesn't report anything
> related to `modpost: vmlinux: section mismatch in reference:
> trace_printk_init_buffers.part`.

Did you do a "make mrproper" between both builds?

> 
> So it looks like this commit introduced the warning. I'm not sure where to look
> yet, but I'll dig into `modpost.c` to understand the root cause. If you have any 
> suggestions on where I should start looking, I'd really appreciate them.
> 
> Also, I'd like to ask how urgent this issue is. It might take me some time to
> find the root cause.

It's only a warning with the W=1 build. There's many other warnings there
too, so I don't think it's high priority.

Thanks,

-- Steve