tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   fe8eec967fb5db169b876720a6e0cced026173b6
commit: f3043e8eaca7ed8290bacbc1b8ce7b1b03984a0d [124/298] mm: change vunmap to tear down huge KVA mappings
config: xtensa-common_defconfig (attached as .config)
reproduce:
  wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
  chmod +x ~/bin/make.cross
  git checkout f3043e8eaca7ed8290bacbc1b8ce7b1b03984a0d
  # save the attached .config to linux build tree
  make.cross ARCH=xtensa 

All error/warnings:

   include/asm-generic/pgtable.h: Assembler messages:
   include/asm-generic/pgtable.h:712: Error: unknown opcode or format name 'static'
   include/asm-generic/pgtable.h:714: Error: unknown opcode or format name 'return'
   include/asm-generic/pgtable.h:715: Error: couldn't find a valid instruction format
       ops were: 
   include/asm-generic/pgtable.h:716: Error: unknown opcode or format name 'static'
   include/asm-generic/pgtable.h:718: Error: unknown opcode or format name 'return'
   include/asm-generic/pgtable.h:719: Error: couldn't find a valid instruction format
       ops were: 
   include/asm-generic/pgtable.h:720: Error: unknown opcode or format name 'static'
>> include/asm-generic/pgtable.h:720: Error: extra closing brace
>> include/asm-generic/pgtable.h:720: Error: junk at end of line, first unrecognized character is `}'
   include/asm-generic/pgtable.h:721: Error: unknown opcode or format name 'static'
>> include/asm-generic/pgtable.h:721: Error: extra closing brace
>> include/asm-generic/pgtable.h:721: Error: junk at end of line, first unrecognized character is `}'

vim +720 include/asm-generic/pgtable.h

   706	#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
   707	int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot);
   708	int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot);
   709	int pud_clear_huge(pud_t *pud);
   710	int pmd_clear_huge(pmd_t *pmd);
   711	#else	/* !CONFIG_HAVE_ARCH_HUGE_VMAP */
 > 712	static inline int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot)
   713	{
 > 714		return 0;
   715	}
 > 716	static inline int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot)
   717	{
   718		return 0;
   719	}
 > 720	static inline int pud_clear_huge(pud_t *pud) { return 0; }
 > 721	static inline int pmd_clear_huge(pmd_t *pmd) { return 0; }
   722	#endif	/* CONFIG_HAVE_ARCH_HUGE_VMAP */
   723	
   724	#endif /* _ASM_GENERIC_PGTABLE_H */

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