Re: [PATCH 5/6] block/bdev: lift restrictions on supported blocksize

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

Hi Hannes,

kernel test robot noticed the following build errors:

[auto build test ERROR on axboe-block/for-next]
[also build test ERROR on linus/master v6.9]
[cannot apply to next-20240514]
[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/Hannes-Reinecke/fs-mpage-avoid-negative-shift-for-large-blocksize/20240515-014146
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
patch link:    https://lore.kernel.org/r/20240514173900.62207-6-hare%40kernel.org
patch subject: [PATCH 5/6] block/bdev: lift restrictions on supported blocksize
config: s390-allnoconfig (https://download.01.org/0day-ci/archive/20240515/202405150852.LoiNtqk4-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project b910bebc300dafb30569cecc3017b446ea8eafa0)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240515/202405150852.LoiNtqk4-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/202405150852.LoiNtqk4-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from block/bdev.c:9:
   In file included from include/linux/mm.h:2210:
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   In file included from block/bdev.c:15:
   In file included from include/linux/blk-integrity.h:5:
   In file included from include/linux/blk-mq.h:8:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:78:
   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/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
         |                                                           ^
   include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
     102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
         |                                                      ^
   In file included from block/bdev.c:15:
   In file included from include/linux/blk-integrity.h:5:
   In file included from include/linux/blk-mq.h:8:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:78:
   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/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
         |                                                           ^
   include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
     115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
         |                                                      ^
   In file included from block/bdev.c:15:
   In file included from include/linux/blk-integrity.h:5:
   In file included from include/linux/blk-mq.h:8:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:78:
   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);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     692 |         readsb(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     700 |         readsw(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     708 |         readsl(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     717 |         writesb(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
   include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     726 |         writesw(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
   include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     735 |         writesl(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
   block/bdev.c:145:2: error: call to undeclared function 'mapping_set_folio_min_order'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     145 |         mapping_set_folio_min_order(bdev->bd_inode->i_mapping,
         |         ^
>> block/bdev.c:152:16: error: use of undeclared identifier 'bs'
     152 |         if (get_order(bs) > MAX_PAGECACHE_ORDER || size < 512 ||
         |                       ^
   block/bdev.c:164:3: error: call to undeclared function 'mapping_set_folio_min_order'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     164 |                 mapping_set_folio_min_order(bdev->bd_inode->i_mapping,
         |                 ^
   13 warnings and 3 errors generated.


vim +/bs +152 block/bdev.c

   148	
   149	int set_blocksize(struct block_device *bdev, int size)
   150	{
   151		/* Size must be a power of two, and between 512 and MAX_PAGECACHE_ORDER*/
 > 152		if (get_order(bs) > MAX_PAGECACHE_ORDER || size < 512 ||
   153		    !is_power_of_2(size))
   154			return -EINVAL;
   155	
   156		/* Size cannot be smaller than the size supported by the device */
   157		if (size < bdev_logical_block_size(bdev))
   158			return -EINVAL;
   159	
   160		/* Don't change the size if it is same as current */
   161		if (bdev->bd_inode->i_blkbits != blksize_bits(size)) {
   162			sync_blockdev(bdev);
   163			bdev->bd_inode->i_blkbits = blksize_bits(size);
   164			mapping_set_folio_min_order(bdev->bd_inode->i_mapping,
   165						    get_order(size));
   166			kill_bdev(bdev);
   167		}
   168		return 0;
   169	}
   170	

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