linux-kernel - arch/x86/xen/enlighten_pv.c:118:24: sparse: sparse: incorrect type in initializer (different address spaces)

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Message-ID: <202512140856.Ic6FetG6-lkp@intel.com>
Date: Sun, 14 Dec 2025 08:19:43 +0800
From: kernel test robot <lkp@...el.com>
To: Brian Gerst <brgerst@...il.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...nel.org>, Juergen Gross <jgross@...e.com>,
	Sohil Mehta <sohil.mehta@...el.com>
Subject: arch/x86/xen/enlighten_pv.c:118:24: sparse: sparse: incorrect type
 in initializer (different address spaces)

Hi Brian,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4a298a43f5e339f48d2dda0665c02b88ee9a4e03
commit: 1ab7b5ed44ba9bce581e225f40219b793bc779d6 x86/xen: Move Xen upcall handler
date:   9 months ago
config: x86_64-randconfig-123-20251213 (https://download.01.org/0day-ci/archive/20251214/202512140856.Ic6FetG6-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251214/202512140856.Ic6FetG6-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512140856.Ic6FetG6-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> arch/x86/xen/enlighten_pv.c:118:24: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got bool * @@
   arch/x86/xen/enlighten_pv.c:118:24: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/x86/xen/enlighten_pv.c:118:24: sparse:     got bool *
   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 * @@
   arch/x86/xen/enlighten_pv.c:120:9: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/x86/xen/enlighten_pv.c:120:9: sparse:     got bool *
   arch/x86/xen/enlighten_pv.c:126:9: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got bool * @@
   arch/x86/xen/enlighten_pv.c:126:9: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/x86/xen/enlighten_pv.c:126:9: sparse:     got bool *

vim +118 arch/x86/xen/enlighten_pv.c

   111	
   112	/*
   113	 * In case of scheduling the flag must be cleared and restored after
   114	 * returning from schedule as the task might move to a different CPU.
   115	 */
   116	static __always_inline bool get_and_clear_inhcall(void)
   117	{
 > 118		bool inhcall = __this_cpu_read(xen_in_preemptible_hcall);
   119	
   120		__this_cpu_write(xen_in_preemptible_hcall, false);
   121		return inhcall;
   122	}
   123	

-- 
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https://github.com/intel/lkp-tests/wiki