linux-kernel - Re: [RFC PATCH v3 06/15] jump_label: Add forceful jump label type

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Message-ID: <20241121202106.nqybif4yru57wgu3@jpoimboe>
Date: Thu, 21 Nov 2024 12:21:06 -0800
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: Valentin Schneider <vschneid@...hat.com>
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Subject: Re: [RFC PATCH v3 06/15] jump_label: Add forceful jump label type

On Thu, Nov 21, 2024 at 04:51:09PM +0100, Valentin Schneider wrote:
> Okay so forcing the IPI for .noinstr patching lets us get rid of all the
> force_ipi faff; however I would still want the special marking to tell
> objtool "yep we're okay with this one", and still get warnings when a new
> .noinstr key gets added so we double think about it.

Yeah.  Though, instead of DECLARE_STATIC_KEY_FALSE_NOINSTR adding a new
jump label type, it could just add an objtool annotation pointing to the
key.  If that's the way we're going I could whip up a patch if that
would help.

-- 
Josh