linux-kernel - Re: [PATCH] x86/xen: Fix sparse warning in enlighten

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <fe4f5cce-a82e-4216-868e-eb906edc53d1@oracle.com>
Date: Mon, 15 Dec 2025 14:29:59 -0500
From: Boris Ostrovsky <boris.ostrovsky@...cle.com>
To: Juergen Gross <jgross@...e.com>, linux-kernel@...r.kernel.org,
        x86@...nel.org
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, xen-devel@...ts.xenproject.org,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] x86/xen: Fix sparse warning in enlighten_pv.c



On 12/15/25 6:51 AM, Juergen Gross wrote:
> The sparse tool issues a warning for arch/x76/xen/enlighten_pv.c:
> 
>     arch/x86/xen/enlighten_pv.c:120:9: sparse: sparse: incorrect type
>       in initializer (different address spaces)
>       expected void const [noderef] __percpu *__vpp_verify
>       got bool *
> 
> This is due to the percpu variable xen_in_preemptible_hcall being
> exported via EXPORT_SYMBOL_GPL() instead of EXPORT_PER_CPU_SYMBOL_GPL().
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202512140856.Ic6FetG6-lkp@intel.com/
> Fixes: fdfd811ddde3 ("x86/xen: allow privcmd hypercalls to be preempted")
> Signed-off-by: Juergen Gross <jgross@...e.com>

Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>