linux-kernel - Re: [PATCH] x86/irqflags: Fix build failure

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Message-ID: <b6c93e2b-a3d8-448a-8783-697715b968ea@suse.com>
Date: Mon, 19 Jan 2026 14:52:44 +0100
From: Jürgen Groß <jgross@...e.com>
To: Borislav Petkov <bp@...en8.de>
Cc: linux-kernel@...r.kernel.org, x86@...nel.org,
 Thomas Gleixner <tglx@...nel.org>, Ingo Molnar <mingo@...hat.com>,
 Dave Hansen <dave.hansen@...ux.intel.com>, "H. Peter Anvin" <hpa@...or.com>,
 kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] x86/irqflags: Fix build failure

On 19.01.26 14:28, Borislav Petkov wrote:
> On Mon, Jan 19, 2026 at 12:52:50PM +0100, Jürgen Groß wrote:
>> So do you want me to resend the series triggering the issue with this patch
>> prepended, or are you fine with applying this patch to the tip branch for
>> the next merge window, and wait for the other series to get the needed Acks?
> 
> Or, you could redesign your set in a way so that the build error doesn't
> happen and there's no need for an urgent patch with a questionable Fixes: tag?
> 
> Also, the "pure luck" thing would need debugging too, to figure out why the
> build error happens.
> 

Well, the patch IS the fix for the build error.

paravirt.h just needs to be included if CONFIG_PARAVIRT is set. It isn't
enough to include it only if CONFIG_PARAVIRT_XXL is set.

The patch listed under "Fixes:" moved the halt related functions from the
CONFIG_PARAVIRT_XXL to the CONFIG_PARAVIRT umbrella, but missed to move
the #include of paravirt.h, too. This is what my patch is doing.

Juergen

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