linux-kernel - [kas:lam 4/13] arch/x86/include/asm/tlbflush.h:380:43: error: 'cpu

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Date:   Wed, 13 Jul 2022 12:57:18 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [kas:lam 4/13] arch/x86/include/asm/tlbflush.h:380:43: error:
 'cpu_tlbstate' undeclared

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git lam
head:   ca9762d59aa41bc0a580c2f7668038d31c991f59
commit: ce8762cf0c572b53a82a08a369376c28cfb6fda4 [4/13] x86/mm: Handle LAM on context switch
config: x86_64-randconfig-a002
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git/commit/?id=ce8762cf0c572b53a82a08a369376c28cfb6fda4
        git remote add kas https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git
        git fetch --no-tags kas lam
        git checkout ce8762cf0c572b53a82a08a369376c28cfb6fda4
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash mm/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   In file included from include/asm-generic/percpu.h:7,
                    from arch/x86/include/asm/percpu.h:390,
                    from arch/x86/include/asm/current.h:6,
                    from arch/x86/include/asm/processor.h:17,
                    from arch/x86/include/asm/timex.h:5,
                    from include/linux/timex.h:67,
                    from include/linux/time32.h:13,
                    from include/linux/time.h:60,
                    from include/linux/stat.h:19,
                    from include/linux/module.h:13,
                    from mm/zsmalloc.c:41:
   arch/x86/include/asm/tlbflush.h: In function 'tlbstate_lam_cr3_mask':
>> arch/x86/include/asm/tlbflush.h:380:43: error: 'cpu_tlbstate' undeclared (first use in this function)
     380 |         unsigned long lam = this_cpu_read(cpu_tlbstate.lam);
         |                                           ^~~~~~~~~~~~
   include/linux/percpu-defs.h:318:16: note: in definition of macro '__pcpu_size_call_return'
     318 |         typeof(variable) pscr_ret__;                                    \
         |                ^~~~~~~~
   arch/x86/include/asm/tlbflush.h:380:29: note: in expansion of macro 'this_cpu_read'
     380 |         unsigned long lam = this_cpu_read(cpu_tlbstate.lam);
         |                             ^~~~~~~~~~~~~
   arch/x86/include/asm/tlbflush.h:380:43: note: each undeclared identifier is reported only once for each function it appears in
     380 |         unsigned long lam = this_cpu_read(cpu_tlbstate.lam);
         |                                           ^~~~~~~~~~~~
   include/linux/percpu-defs.h:318:16: note: in definition of macro '__pcpu_size_call_return'
     318 |         typeof(variable) pscr_ret__;                                    \
         |                ^~~~~~~~
   arch/x86/include/asm/tlbflush.h:380:29: note: in expansion of macro 'this_cpu_read'
     380 |         unsigned long lam = this_cpu_read(cpu_tlbstate.lam);
         |                             ^~~~~~~~~~~~~
   arch/x86/include/asm/tlbflush.h: In function 'set_tlbstate_cr3_lam_mask':
   arch/x86/include/asm/tlbflush.h:387:24: error: 'cpu_tlbstate' undeclared (first use in this function)
     387 |         this_cpu_write(cpu_tlbstate.lam, mask >> X86_CR3_LAM_U57_BIT);
         |                        ^~~~~~~~~~~~
   include/linux/percpu-defs.h:219:54: note: in definition of macro '__verify_pcpu_ptr'
     219 |         const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL;    \
         |                                                      ^~~
   include/linux/percpu-defs.h:508:41: note: in expansion of macro '__pcpu_size_call'
     508 | #define this_cpu_write(pcp, val)        __pcpu_size_call(this_cpu_write_, pcp, val)
         |                                         ^~~~~~~~~~~~~~~~
   arch/x86/include/asm/tlbflush.h:387:9: note: in expansion of macro 'this_cpu_write'
     387 |         this_cpu_write(cpu_tlbstate.lam, mask >> X86_CR3_LAM_U57_BIT);
         |         ^~~~~~~~~~~~~~


vim +/cpu_tlbstate +380 arch/x86/include/asm/tlbflush.h

   376	
   377	#ifdef CONFIG_X86_64
   378	static inline unsigned long tlbstate_lam_cr3_mask(void)
   379	{
 > 380		unsigned long lam = this_cpu_read(cpu_tlbstate.lam);
   381	
   382		return lam << X86_CR3_LAM_U57_BIT;
   383	}
   384	

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