linux-kernel - Re: [PATCH] ftrace: x86: Fix a compile error about get_kernel

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Message-Id: <20250213090334.dc00185d643d96722dab9902@kernel.org>
Date: Thu, 13 Feb 2025 09:03:34 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Peter Zijlstra <peterz@...radead.org>, "Masami Hiramatsu (Google)"
 <mhiramat@...nel.org>, Gabriel de Perthuis <g2p.code@...il.com>, Haiyue
 Wang <haiyuewa@....com>, Sami Tolvanen <samitolvanen@...gle.com>, Mark
 Rutland <mark.rutland@....com>, Thomas Gleixner <tglx@...utronix.de>, Ingo
 Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen
 <dave.hansen@...ux.intel.com>, "H . Peter Anvin" <hpa@...or.com>,
 x86@...nel.org, linux-trace-kernel@...r.kernel.org, LKML
 <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ftrace: x86: Fix a compile error about
 get_kernel_nofault()

On Tue, 11 Feb 2025 10:50:02 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> On Tue, 11 Feb 2025 11:09:14 +0100
> Peter Zijlstra <peterz@...radead.org> wrote:
> 
> > I was aiming my patch for x86/core, but if there's a reason to expedite
> > them, I can stick it in x86/urgent I suppose.
> > 
> > Just need a reason -- what's this compile error nonsense about, my
> > kernels build just fine?
> 
> Masami,
> 
> Do you have a config that fails to build without this fix? If so, can you
> please reply with it, and then this can go in as a quick fix.

Let me share the config. But as Sami pointed, the combination of 
CONFIG_GENDWARFKSYMS and CONFIG_FUNCTION_TRACER caused this issue.

Thank you,

> 
> Thanks,
> 
> -- Steve

-- 
Masami Hiramatsu (Google) <mhiramat@...nel.org>

Download attachment "build-error.kconfig" of type "application/octet-stream" (191001 bytes)