[kbuild-all] [weiny2:lm-misc4 6/9] arch/mips/include/asm/mmu_context.h:174:2: error: implicit declaration of function 'htw_start'; did you mean 'va_start'?

Friday, 17 April 2020

tree:   https://github.com/weiny2/linux-kernel.git lm-misc4
head:   413900345f279daed0a18bbe2a961937f3bed04a
commit: ac6e51614cb3f8e21f9cc4361f99cf2b8797c777 [6/9] arch/kmap: Remove redundant arch
specific kmaps
config: mips-32r2_defconfig (attached as .config)
compiler: mips-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout ac6e51614cb3f8e21f9cc4361f99cf2b8797c777
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp(a)intel.com&gt;

All errors (new ones prefixed by >>):

   In file included from include/linux/bug.h:5,
                    from include/linux/thread_info.h:12,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/mips/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:51,
                    from include/linux/seqlock.h:36,
                    from include/linux/time.h:6,
                    from include/linux/compat.h:10,
                    from arch/mips/kernel/asm-offsets.c:12:
   arch/mips/include/asm/cacheflush.h: In function 'flush_kernel_dcache_page':
   include/linux/page-flags.h:382:41: error: implicit declaration of function
'page_zonenum' [-Werror=implicit-function-declaration]
     382 | #define PageHighMem(__p) is_highmem_idx(page_zonenum(__p))
         |                                         ^~~~~~~~~~~~
   arch/mips/include/asm/bug.h:34:44: note: in definition of macro 'BUG_ON'
      34 | #define BUG_ON(C) __BUG_ON((unsigned long)(C))
         |                                            ^
   arch/mips/include/asm/cacheflush.h:131:31: note: in expansion of macro
'PageHighMem'
     131 |  BUG_ON(cpu_has_dc_aliases && PageHighMem(page));
         |                               ^~~~~~~~~~~
   In file included from arch/mips/include/asm/tlbflush.h:25,
                    from arch/mips/include/asm/highmem.h:28,
                    from arch/mips/include/asm/pgtable-32.h:22,
                    from arch/mips/include/asm/pgtable.h:14,
                    from include/linux/mm.h:95,
                    from arch/mips/kernel/asm-offsets.c:15:
   arch/mips/include/asm/mmu_context.h: In function 'switch_mm':
   arch/mips/include/asm/mmu_context.h:165:2: error: implicit declaration of function
'htw_stop' [-Werror=implicit-function-declaration]
     165 |  htw_stop();
         |  ^~~~~~~~
...
> arch/mips/include/asm/mmu_context.h:174:2: error: implicit
declaration of function 'htw_start'; did you mean 'va_start'?
[-Werror=implicit-function-declaration]      174 |  htw_start();
         |  ^~~~~~~~~
         |  va_start
   In file included from arch/mips/include/asm/pgtable-32.h:22,
                    from arch/mips/include/asm/pgtable.h:14,
                    from include/linux/mm.h:95,
                    from arch/mips/kernel/asm-offsets.c:15:
   arch/mips/include/asm/highmem.h: In function 'kmap':
   arch/mips/include/asm/highmem.h:55:15: error: implicit declaration of function
'__kmap'; did you mean 'kmap'? [-Werror=implicit-function-declaration]
      55 |  void *addr = __kmap(page);
         |               ^~~~~~
         |               kmap
   arch/mips/include/asm/highmem.h:55:15: warning: initialization of 'void *' from
'int' makes pointer from integer without a cast [-Wint-conversion]
   In file included from arch/mips/kernel/asm-offsets.c:15:
   include/linux/mm.h: At top level:
   include/linux/mm.h:1051:30: error: conflicting types for 'page_zonenum'
    1051 | static inline enum zone_type page_zonenum(const struct page *page)
         |                              ^~~~~~~~~~~~
   In file included from include/linux/bug.h:5,
                    from include/linux/thread_info.h:12,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/mips/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:51,
                    from include/linux/seqlock.h:36,
                    from include/linux/time.h:6,
                    from include/linux/compat.h:10,
                    from arch/mips/kernel/asm-offsets.c:12:
   include/linux/page-flags.h:382:41: note: previous implicit declaration of
'page_zonenum' was here
     382 | #define PageHighMem(__p) is_highmem_idx(page_zonenum(__p))
         |                                         ^~~~~~~~~~~~
   arch/mips/include/asm/bug.h:34:44: note: in definition of macro 'BUG_ON'
      34 | #define BUG_ON(C) __BUG_ON((unsigned long)(C))
         |                                            ^
   arch/mips/include/asm/cacheflush.h:131:31: note: in expansion of macro
'PageHighMem'
     131 |  BUG_ON(cpu_has_dc_aliases && PageHighMem(page));
         |                               ^~~~~~~~~~~
   In file included from include/linux/pagemap.h:11,
                    from include/linux/blkdev.h:16,
                    from include/linux/blk-cgroup.h:23,
                    from include/linux/writeback.h:14,
                    from include/linux/memcontrol.h:22,
                    from include/linux/swap.h:9,
                    from include/linux/suspend.h:5,
                    from arch/mips/kernel/asm-offsets.c:17:
   include/linux/highmem.h:34:14: error: conflicting types for '__kmap'
      34 | extern void *__kmap(struct page *page);
         |              ^~~~~~
   In file included from arch/mips/include/asm/pgtable-32.h:22,
                    from arch/mips/include/asm/pgtable.h:14,
                    from include/linux/mm.h:95,
                    from arch/mips/kernel/asm-offsets.c:15:
   arch/mips/include/asm/highmem.h:55:15: note: previous implicit declaration of
'__kmap' was here
      55 |  void *addr = __kmap(page);
         |               ^~~~~~
   In file included from include/linux/pagemap.h:11,
                    from include/linux/blkdev.h:16,
                    from include/linux/blk-cgroup.h:23,
                    from include/linux/writeback.h:14,
                    from include/linux/memcontrol.h:22,
                    from include/linux/swap.h:9,
                    from include/linux/suspend.h:5,
                    from arch/mips/kernel/asm-offsets.c:17:
   include/linux/highmem.h:40:21: error: redefinition of 'kmap'
      40 | static inline void *kmap(struct page *page)
         |                     ^~~~
   In file included from arch/mips/include/asm/pgtable-32.h:22,
                    from arch/mips/include/asm/pgtable.h:14,
                    from include/linux/mm.h:95,
                    from arch/mips/kernel/asm-offsets.c:15:
   arch/mips/include/asm/highmem.h:53:21: note: previous definition of 'kmap' was
here
      53 | static inline void *kmap(struct page *page)
         |                     ^~~~
   cc1: some warnings being treated as errors
   make[2]: *** [scripts/Makefile.build:100: arch/mips/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [Makefile:1141: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:180: sub-make] Error 2
   34 real  7 user  15 sys  67.54% cpu 	make prepare

vim +174 arch/mips/include/asm/mmu_context.h

^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  157  
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  158  static
inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  159  			   
 struct task_struct *tsk)
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  160  {
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  161 
	unsigned int cpu = smp_processor_id();
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  162 
	unsigned long flags;
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  163 
	local_irq_save(flags);
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  164  
ed4cbc81addbc0 arch/mips/include/asm/mmu_context.h Markos Chandras 2015-01-26  165 
	htw_stop();
42d5b846574f09 arch/mips/include/asm/mmu_context.h Paul Burton     2019-02-02  166 
	check_switch_mmu_context(next);
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  167  
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  168  	/*
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  169  	 *
Mark current->active_mm as not "active" anymore.
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  170  	 * We
don't want to mislead possible IPI tlb flush routines.
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  171  	 */
55b8cab49dd43d arch/mips/include/asm/mmu_context.h Rusty Russell   2009-09-24  172 
	cpumask_clear_cpu(cpu, mm_cpumask(prev));
55b8cab49dd43d arch/mips/include/asm/mmu_context.h Rusty Russell   2009-09-24  173 
	cpumask_set_cpu(cpu, mm_cpumask(next));
ed4cbc81addbc0 arch/mips/include/asm/mmu_context.h Markos Chandras 2015-01-26 @174 
	htw_start();
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  175  
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  176 
	local_irq_restore(flags);
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  177  }
^1da177e4c3f41 include/asm-mips/mmu_context.h      Linus Torvalds  2005-04-16  178  

:::::: The code at line 174 was first introduced by commit
:::::: ed4cbc81addbc076b016c5b979fd1a02f0897f0a MIPS: HTW: Prevent accidental HTW start
due to nested htw_{start, stop}

:::::: TO: Markos Chandras <markos.chandras(a)imgtec.com&gt;
:::::: CC: Ralf Baechle <ralf(a)linux-mips.org&gt;

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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[kbuild-all] [weiny2:lm-misc4 6/9] arch/mips/include/asm/mmu_context.h:174:2: error: implicit declaration of function 'htw_start'; did you mean 'va_start'?