linux-kernel - Re: [PATCH 07/22] x86/srso: Remove default case in srso_select

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Message-ID: <20230823061814.GFZOWkpi9KapibyswG@fat_crate.local>
Date:   Wed, 23 Aug 2023 08:18:14 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Josh Poimboeuf <jpoimboe@...nel.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Babu Moger <babu.moger@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>, David.Kaplan@....com,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        Nikolay Borisov <nik.borisov@...e.com>,
        gregkh@...uxfoundation.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 07/22] x86/srso: Remove default case in
 srso_select_mitigation()

On Sun, Aug 20, 2023 at 06:19:04PM -0700, Josh Poimboeuf wrote:
> Remove the default case so a compiler warning gets printed

There are other similar cases in this file. We should make it an
explicit rule that this file - being special and security-sensitive and
all - should handle all switch cases explicitly so that it is obvious
what gets selected and that people think about every possible option
when doing a switch-case.

> if we forget one of the enums.

No "we" please - make that passive voice.

Thx.

-- 
Regards/Gruss,
    Boris.

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