Re: [PATCH v1 14/14] include: reduce dependencies on linux/mm.h

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

Hi Max,

kernel test robot noticed the following build errors:

[auto build test ERROR on next-20240215]
[cannot apply to akpm-mm/mm-everything char-misc/char-misc-testing char-misc/char-misc-next char-misc/char-misc-linus powerpc/next powerpc/fixes linus/master v6.8-rc4 v6.8-rc3 v6.8-rc2 v6.8-rc4]
[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/Max-Kellermann/drivers-add-missing-includes-on-linux-mm-h-and-others/20240215-225853
base:   next-20240215
patch link:    https://lore.kernel.org/r/20240215145602.1371274-15-max.kellermann%40ionos.com
patch subject: [PATCH v1 14/14] include: reduce dependencies on linux/mm.h
config: hexagon-allnoconfig (https://download.01.org/0day-ci/archive/20240218/202402180115.xH2WHdhd-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 36adfec155de366d722f2bac8ff9162289dcf06c)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240218/202402180115.xH2WHdhd-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/202402180115.xH2WHdhd-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from lib/scatterlist.c:9:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     547 |         val = __raw_readb(PCI_IOBASE + addr);
         |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     560 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
         |                                                   ^
   In file included from lib/scatterlist.c:9:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     573 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
         |                                                   ^
   In file included from lib/scatterlist.c:9:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     584 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     594 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     604 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
>> lib/scatterlist.c:739:9: error: call to undeclared function 'PAGE_ALIGN'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     739 |         return PAGE_ALIGN(sg->offset + sg->length) >> PAGE_SHIFT;
         |                ^
   lib/scatterlist.c:763:9: error: call to undeclared function 'PAGE_ALIGN'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     763 |         return PAGE_ALIGN(sg->offset + sg_dma_len(sg)) >> PAGE_SHIFT;
         |                ^
>> lib/scatterlist.c:1153:3: error: call to undeclared function 'unpin_user_page'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1153 |                 unpin_user_page(sg_page(&sgtable->sgl[--sgtable->nents]));
         |                 ^
>> lib/scatterlist.c:1239:8: error: call to undeclared function 'is_vmalloc_or_module_addr'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1239 |                         if (is_vmalloc_or_module_addr((void *)kaddr))
         |                             ^
>> lib/scatterlist.c:1240:12: error: call to undeclared function 'vmalloc_to_page'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1240 |                                 page = vmalloc_to_page((void *)kaddr);
         |                                        ^
   lib/scatterlist.c:1240:12: note: did you mean 'vmalloc_nr_pages'?
   include/linux/vmalloc.h:135:22: note: 'vmalloc_nr_pages' declared here
     135 | extern unsigned long vmalloc_nr_pages(void);
         |                      ^
>> lib/scatterlist.c:1240:10: error: incompatible integer to pointer conversion assigning to 'struct page *' from 'int' [-Wint-conversion]
    1240 |                                 page = vmalloc_to_page((void *)kaddr);
         |                                      ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   6 warnings and 6 errors generated.


vim +/PAGE_ALIGN +739 lib/scatterlist.c

a321e91b6d73ed Imre Deak 2013-02-27  736  
a321e91b6d73ed Imre Deak 2013-02-27  737  static int sg_page_count(struct scatterlist *sg)
a321e91b6d73ed Imre Deak 2013-02-27  738  {
a321e91b6d73ed Imre Deak 2013-02-27 @739  	return PAGE_ALIGN(sg->offset + sg->length) >> PAGE_SHIFT;
a321e91b6d73ed Imre Deak 2013-02-27  740  }
a321e91b6d73ed Imre Deak 2013-02-27  741  

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