linux-kernel - Re: [PATCH v6 3/5] x86/cpufeatures: Generate a feature mask header based on build config

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Message-ID: <20250305220455.GOZ8jKh4bGqplm2UhF@fat_crate.local>
Date: Wed, 5 Mar 2025 23:04:55 +0100
From: Borislav Petkov <bp@...en8.de>
To: Xin Li <xin@...or.com>
Cc: "H. Peter Anvin" <hpa@...or.com>, "Aithal, Srikanth" <sraithal@....com>,
	linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
	tglx@...utronix.de, mingo@...hat.com, dave.hansen@...ux.intel.com,
	x86@...nel.org, will@...nel.org, peterz@...radead.org,
	yury.norov@...il.com, akpm@...ux-foundation.org, acme@...nel.org,
	namhyung@...nel.org, brgerst@...il.com, andrew.cooper3@...rix.com,
	nik.borisov@...e.com
Subject: Re: [PATCH v6 3/5] x86/cpufeatures: Generate a feature mask header
 based on build config

On Tue, Mar 04, 2025 at 11:30:43PM -0800, Xin Li wrote:
> > Why do you even need featuremasks_hdr as a prereq?
> 
> I'm not sure I'm calling it a prereq; 

That's what this is called:

https://www.gnu.org/software/make/manual/html_node/Rule-Introduction.html

A prerequisite to a target, latter being "archheaders" in this case.

> Sorry for the build noise.  Ofc they should be zapped.
> 
> BTW, I'm asking if this build check could be added to Intel-LKP.

Good idea.

> However it needs to change Makefile in the root directory, which is not
> maintained in tip, so I will send a separate patch to KERNEL BUILD
> maintainers and list.  Make sense?

Ditto.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette