Subject: Re: linux-next: build failure after merge of the ftrace tree

From: Masami Hiramatsu (Google) <[email-masked]>
Date: Mon, 6 Oct 2025 09:31:23 +0900

On Thu, 2 Oct 2025 16:50:38 +0100
Mark Brown <[email-masked]> wrote:

> Hi all,
> 
> After merging the ftrace tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
> 
> /tmp/next/build/kernel/trace/trace_wprobe.c: In function '__register_trace_wprobe':
> /tmp/next/build/kernel/trace/trace_wprobe.c:176:20: error: cast to generic address space pointer from disjoint '__seg_gs' address space pointer [-Werror]
>   176 |         if (IS_ERR((void * __force)tw->bp_event)) {
>       |                    ^
> /tmp/next/build/kernel/trace/trace_wprobe.c:177:35: error: cast to generic address space pointer from disjoint '__seg_gs' address space pointer [-Werror]
>   177 |                 int ret = PTR_ERR((void * __force)tw->bp_event);
>       |                                   ^
> 
> Caused by commit
> 
>    eaa7b0b3b9875 ("tracing: wprobe: Add watchpoint probe event based on hardware breakpoint")
> 
> I have used the version from 20250929 instead.

Oops, this is the error. Thanks for reporting!

-- 
Masami Hiramatsu (Google) <[email-masked]>