linux-kernel - [tip:x86/cpu 3/14] arch/x86/xen/enlighten_pv.c:118:24: sparse: sparse: incorrect type in initializer (different address spaces)

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Message-ID: <202503190109.ewohfLu6-lkp@intel.com>
Date: Wed, 19 Mar 2025 01:16:22 +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,
	x86@...nel.org, Ingo Molnar <mingo@...nel.org>,
	Juergen Gross <jgross@...e.com>,
	Sohil Mehta <sohil.mehta@...el.com>
Subject: [tip:x86/cpu 3/14] 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/tip/tip.git x86/cpu
head:   ba501f14e1e6dcc94ff0276301e997ae28e3f4b3
commit: 82d829091f62721166d3f1af93c4c94fc9afa13e [3/14] x86/xen: Move Xen upcall handler
config: x86_64-randconfig-121-20250318 (https://download.01.org/0day-ci/archive/20250319/202503190109.ewohfLu6-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250319/202503190109.ewohfLu6-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/202503190109.ewohfLu6-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   arch/x86/xen/enlighten_pv.c:1490:28: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got struct gdt_page * @@
   arch/x86/xen/enlighten_pv.c:1490:28: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/x86/xen/enlighten_pv.c:1490:28: sparse:     got struct gdt_page *
   arch/x86/xen/enlighten_pv.c: note: in included file (through arch/x86/include/asm/stackprotector.h, include/linux/stackprotector.h):
   arch/x86/include/asm/desc.h:54:16: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got struct gdt_page * @@
   arch/x86/include/asm/desc.h:54:16: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/x86/include/asm/desc.h:54:16: sparse:     got struct gdt_page *
>> 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