Re: [PATCH v2 01/21] x86/paravirt: Remove not needed includes of paravirt.h

[kernel test robot <lkp@intel.com>]

Hi Juergen,

kernel test robot noticed the following build errors:

[auto build test ERROR on tip/sched/core]
[also build test ERROR on kvm/queue kvm/next linus/master v6.17-rc6 next-20250917]
[cannot apply to tip/x86/core kvm/linux-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Juergen-Gross/x86-paravirt-Remove-not-needed-includes-of-paravirt-h/20250917-230321
base:   tip/sched/core
patch link:    https://lore.kernel.org/r/20250917145220.31064-2-jgross%40suse.com
patch subject: [PATCH v2 01/21] x86/paravirt: Remove not needed includes of paravirt.h
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20250918/202509181151.ja2As5H4-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250918/202509181151.ja2As5H4-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509181151.ja2As5H4-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from kernel/cpu.c:13:
   In file included from include/linux/sched/isolation.h:5:
   In file included from include/linux/cpuset.h:18:
   In file included from include/linux/mmu_context.h:5:
>> arch/x86/include/asm/mmu_context.h:225:2: error: call to undeclared function 'paravirt_enter_mmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     225 |         paravirt_enter_mmap(mm);
         |         ^
>> arch/x86/include/asm/mmu_context.h:232:2: error: call to undeclared function 'paravirt_arch_exit_mmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     232 |         paravirt_arch_exit_mmap(mm);
         |         ^
   arch/x86/include/asm/mmu_context.h:232:2: note: did you mean 'ldt_arch_exit_mmap'?
   arch/x86/include/asm/mmu_context.h:61:6: note: 'ldt_arch_exit_mmap' declared here
      61 | void ldt_arch_exit_mmap(struct mm_struct *mm);
         |      ^
   In file included from kernel/cpu.c:42:
   In file included from include/trace/events/power.h:12:
   In file included from include/linux/trace_events.h:10:
   In file included from include/linux/perf_event.h:53:
   In file included from include/linux/security.h:35:
   In file included from include/linux/bpf.h:33:
   In file included from arch/x86/include/asm/rqspinlock.h:5:
   arch/x86/include/asm/paravirt.h:736:20: error: static declaration of 'paravirt_enter_mmap' follows non-static declaration
     736 | static inline void paravirt_enter_mmap(struct mm_struct *mm)
         |                    ^
   arch/x86/include/asm/mmu_context.h:225:2: note: previous implicit declaration is here
     225 |         paravirt_enter_mmap(mm);
         |         ^
   In file included from kernel/cpu.c:42:
   In file included from include/trace/events/power.h:12:
   In file included from include/linux/trace_events.h:10:
   In file included from include/linux/perf_event.h:53:
   In file included from include/linux/security.h:35:
   In file included from include/linux/bpf.h:33:
   In file included from arch/x86/include/asm/rqspinlock.h:5:
   arch/x86/include/asm/paravirt.h:742:20: error: static declaration of 'paravirt_arch_exit_mmap' follows non-static declaration
     742 | static inline void paravirt_arch_exit_mmap(struct mm_struct *mm)
         |                    ^
   arch/x86/include/asm/mmu_context.h:232:2: note: previous implicit declaration is here
     232 |         paravirt_arch_exit_mmap(mm);
         |         ^
   4 errors generated.
--
   In file included from kernel/workqueue.c:52:
   In file included from include/linux/sched/isolation.h:5:
   In file included from include/linux/cpuset.h:18:
   In file included from include/linux/mmu_context.h:5:
>> arch/x86/include/asm/mmu_context.h:225:2: error: call to undeclared function 'paravirt_enter_mmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     225 |         paravirt_enter_mmap(mm);
         |         ^
>> arch/x86/include/asm/mmu_context.h:232:2: error: call to undeclared function 'paravirt_arch_exit_mmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     232 |         paravirt_arch_exit_mmap(mm);
         |         ^
   arch/x86/include/asm/mmu_context.h:232:2: note: did you mean 'ldt_arch_exit_mmap'?
   arch/x86/include/asm/mmu_context.h:61:6: note: 'ldt_arch_exit_mmap' declared here
      61 | void ldt_arch_exit_mmap(struct mm_struct *mm);
         |      ^
   2 errors generated.
--
>> arch/x86/kernel/x86_init.c:90:15: error: use of undeclared identifier 'default_banner'
      90 |                 .banner                 = default_banner,
         |                                           ^
   1 error generated.
--
   In file included from arch/x86/mm/init.c:30:
>> arch/x86/include/asm/mmu_context.h:225:2: error: call to undeclared function 'paravirt_enter_mmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     225 |         paravirt_enter_mmap(mm);
         |         ^
>> arch/x86/include/asm/mmu_context.h:232:2: error: call to undeclared function 'paravirt_arch_exit_mmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     232 |         paravirt_arch_exit_mmap(mm);
         |         ^
   arch/x86/include/asm/mmu_context.h:232:2: note: did you mean 'ldt_arch_exit_mmap'?
   arch/x86/include/asm/mmu_context.h:61:6: note: 'ldt_arch_exit_mmap' declared here
      61 | void ldt_arch_exit_mmap(struct mm_struct *mm);
         |      ^
>> arch/x86/mm/init.c:827:2: error: call to undeclared function 'paravirt_enter_mmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     827 |         paravirt_enter_mmap(text_poke_mm);
         |         ^
   3 errors generated.


vim +/paravirt_enter_mmap +225 arch/x86/include/asm/mmu_context.h

a31e184e4f6996 Dave Hansen        2019-01-02  221  
c10e83f598d080 Thomas Gleixner    2017-12-14  222  static inline int arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
a1ea1c032b8f8c Dave Hansen        2014-11-18  223  {
a31e184e4f6996 Dave Hansen        2019-01-02  224  	arch_dup_pkeys(oldmm, mm);
c9ae1b10d95610 Juergen Gross      2023-02-07 @225  	paravirt_enter_mmap(mm);
82721d8b25d76c Kirill A. Shutemov 2023-03-12  226  	dup_lam(oldmm, mm);
a4828f81037f49 Thomas Gleixner    2017-12-14  227  	return ldt_dup_context(oldmm, mm);
a1ea1c032b8f8c Dave Hansen        2014-11-18  228  }
a1ea1c032b8f8c Dave Hansen        2014-11-18  229  
a1ea1c032b8f8c Dave Hansen        2014-11-18  230  static inline void arch_exit_mmap(struct mm_struct *mm)
a1ea1c032b8f8c Dave Hansen        2014-11-18  231  {
a1ea1c032b8f8c Dave Hansen        2014-11-18 @232  	paravirt_arch_exit_mmap(mm);
f55f0501cbf65e Andy Lutomirski    2017-12-12  233  	ldt_arch_exit_mmap(mm);
a1ea1c032b8f8c Dave Hansen        2014-11-18  234  }
a1ea1c032b8f8c Dave Hansen        2014-11-18  235  

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