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From: Dave Hansen <dave.hansen@intel.com>
To: Xin Li <xin@zytor.com>, kernel test robot <lkp@intel.com>,
	linux-kernel@vger.kernel.org
Cc: oe-kbuild-all@lists.linux.dev, tglx@linutronix.de,
	mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com,
	x86@kernel.org, hpa@zytor.com, peterz@infradead.org,
	andrew.cooper3@citrix.com, stable@vger.kernel.org
Subject: Re: [PATCH v1 1/1] x86/fred/signal: Prevent single-step upon ERETU completion
Date: Thu, 22 May 2025 10:54:43 -0700	[thread overview]
Message-ID: <8342ee1c-5adc-4a6a-b4ee-f7d3b42a6528@intel.com> (raw)
In-Reply-To: <83b013fb-2057-4097-ac8c-b5c38d019a0f@zytor.com>

On 5/22/25 10:33, Xin Li wrote:
>>>> arch/x86/include/asm/sighandling.h:44:21: error: 'struct pt_regs'
>>>> has no member named 'fred_ss'
>>        44 |                 regs->fred_ss.swevent = 0;
>>           |                     ^~
>>
> 
> Hmm, this statement is under IS_ENABLED(CONFIG_X86_FRED), which should

The compiler still _compiles_ unreachable statements:

	if (0)
		foo = bar.bar;

An #ifdef will keep the compiler out completely, of course. That's
probably the best thing in this case, especially since it'll be tucked
away in a header.

  parent reply	other threads:[~2025-05-22 17:54 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-05-22  6:05 Xin Li (Intel)
2025-05-22  7:20 ` H. Peter Anvin
2025-05-22 17:10   ` Xin Li
2025-05-22 17:20 ` kernel test robot
2025-05-22 17:33   ` Xin Li
2025-05-22 17:51     ` Andrew Cooper
2025-05-23  6:23       ` Xin Li
2025-05-22 17:54     ` Dave Hansen [this message]
2025-05-23  6:24       ` Xin Li

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