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

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Message-ID: <20251215115112.15072-1-jgross@suse.com>
Date: Mon, 15 Dec 2025 12:51:12 +0100
From: Juergen Gross <jgross@...e.com>
To: linux-kernel@...r.kernel.org,
	x86@...nel.org
Cc: Juergen Gross <jgross@...e.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	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: [PATCH] x86/xen: Fix sparse warning in enlighten_pv.c

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>
---
 arch/x86/xen/enlighten_pv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 4806cc28d7ca..b74ff8bc7f2a 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -108,7 +108,7 @@ static int xen_cpu_dead_pv(unsigned int cpu);
  * calls.
  */
 DEFINE_PER_CPU(bool, xen_in_preemptible_hcall);
-EXPORT_SYMBOL_GPL(xen_in_preemptible_hcall);
+EXPORT_PER_CPU_SYMBOL_GPL(xen_in_preemptible_hcall);
 
 /*
  * In case of scheduling the flag must be cleared and restored after
-- 
2.51.0