linux-kernel - Re: [PATCH] x86/resctrl: Fix unneeded variable warning reported by kernel test robot

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Date: Thu, 25 Jan 2024 00:41:54 +0100
From: Borislav Petkov <bp@...en8.de>
To: Reinette Chatre <reinette.chatre@...el.com>
Cc: Babu Moger <babu.moger@....com>, corbet@....net, fenghua.yu@...el.com,
	tglx@...utronix.de, mingo@...hat.com, dave.hansen@...ux.intel.com,
	x86@...nel.org, hpa@...or.com, paulmck@...nel.org,
	rdunlap@...radead.org, tj@...nel.org, peterz@...radead.org,
	yanjiewtw@...il.com, kim.phillips@....com, lukas.bulwahn@...il.com,
	seanjc@...gle.com, jmattson@...gle.com, leitao@...ian.org,
	jpoimboe@...nel.org, rick.p.edgecombe@...el.com,
	kirill.shutemov@...ux.intel.com, jithu.joseph@...el.com,
	kai.huang@...el.com, kan.liang@...ux.intel.com,
	daniel.sneddon@...ux.intel.com, pbonzini@...hat.com,
	sandipan.das@....com, ilpo.jarvinen@...ux.intel.com,
	peternewman@...gle.com, maciej.wieczor-retman@...el.com,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	eranian@...gle.com
Subject: Re: [PATCH] x86/resctrl: Fix unneeded variable warning reported by
 kernel test robot

On Thu, Jan 25, 2024 at 12:34:24AM +0100, Borislav Petkov wrote:
> On Wed, Jan 24, 2024 at 03:03:15PM -0800, Reinette Chatre wrote:
> > Since you are the one that decides the rules for inclusion you can make this
> > check to be one where checkpatch.pl can be ignored. No objection from me if
> > you choose to do so (and I will note the precedent for future patches).
> 
> Nah, that's not nearly as important for you to change your workflow.
> 
> What I'd suggest, though, is to sanity-check what checkpatch suggests and
> ask yourself whether it always makes sense.

Dammit, there's a reason I don't use this abomination:

$ cat /tmp/0001-x86-resctrl-Remove-redundant-variable-in-mbm_config_.patch | ./scripts/checkpatch.pl

WARNING: Prefer a maximum 75 chars per line (possible unwrapped commit description?)
#9: 
      commit 54e35eb8611c ("x86/resctrl: Read supported bandwidth sources from CPUID").


WTF?!

I have a line underneath which is even one char longer:

"  commit 92bd5a139033 ("x86/resctrl: Add interface to write mbm_total_bytes_config")"

but it doesn't complain about it.

What a bunch of crap.

I'm writing it as a maximally readable commit message and that's it.
Human-readable beats any script, any day of the week.

Thx.

-- 
Regards/Gruss,
    Boris.

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