linux-kernel - Re: [PATCH] x86: coco: mark cc_mask as __maybe

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Message-ID: <lpkdubngmzv4vwmkykh7vl37jxwhfdnqwnahumwk3ualctv5bx@eka4www55vki>
Date: Wed, 5 Mar 2025 11:02:42 +0200
From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To: Arnd Bergmann <arnd@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, 
	Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, 
	Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>, Rick Edgecombe <rick.p.edgecombe@...el.com>, 
	Tom Lendacky <thomas.lendacky@....com>, Arnd Bergmann <arnd@...db.de>, "H. Peter Anvin" <hpa@...or.com>, 
	"Jason A. Donenfeld" <Jason@...c4.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: coco: mark cc_mask as __maybe_unused

On Tue, Mar 04, 2025 at 03:33:34PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> When extra warnings are enabled, the cc_mask definition in asm/coco.h
> causes a build failure with gcc:
> 
> arch/x86/include/asm/coco.h:28:18: error: 'cc_mask' defined but not used [-Werror=unused-const-variable=]
>    28 | static const u64 cc_mask = 0;
> 
> Mark this one as __maybe_unused.
> 
> Fixes: a0a8d15a798b ("x86/tdx: Preserve shared bit on mprotect()")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Reviewed-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

-- 
  Kiryl Shutsemau / Kirill A. Shutemov