linux-kernel - Re: Fwd: error: 'const_pcpu_hot' causes a section type conflict with 'pcpu

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Message-ID: <8734ng4e91.ffs@tglx>
Date: Wed, 07 Aug 2024 16:08:26 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: Bagas Sanjaya <bagasdotme@...il.com>, Linux Kernel Mailing List
 <linux-kernel@...r.kernel.org>, x86@...nel.org
Cc: Uros Bizjak <ubizjak@...il.com>, Ingo Molnar <mingo@...nel.org>, Linus
 Torvalds <torvalds@...ux-foundation.org>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 "H. Peter Anvin" <hpa@...or.com>, Josh Poimboeuf <jpoimboe@...nel.org>,
 Breno Leitao <leitao@...ian.org>, Kent Overstreet
 <kent.overstreet@...ux.dev>, Takashi Iwai <tiwai@...e.de>, "Russell King
 (Oracle)" <rmk+kernel@...linux.org.uk>, Mark Brown <broonie@...nel.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Arnd Bergmann
 <arnd@...db.de>, Stas Sergeev <stsp2@...dex.ru>, mrwizardwizard
 <terrym3201@...tonmail.com>
Subject: Re: Fwd: error: 'const_pcpu_hot' causes a section type conflict
 with 'pcpu_hot' when compiling with -flto

On Sat, Aug 03 2024 at 10:55, Bagas Sanjaya wrote:
>> when compiling linux kernel 6.9-6.10 with -flto
>>
>> compiler outputs:
>>
>> ./arch/x86/include/asm/current.h:42:25: error: 'const_pcpu_hot' causes a section type conflict with 'pcpu_hot' const_pcpu_hot);
>
> He could reproduce the build error on mainline:

That's caused by:

  ed2f752e0e0a ("x86/percpu: Introduce const-qualified const_pcpu_hot to micro-optimize code generation")

Uros?

Thanks,

        tglx