tree:   https://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git dev-test
head:   38654ff32711761d45ff138634e559a98003c31c
commit: 38654ff32711761d45ff138634e559a98003c31c [2/2] erofs: rename per-CPU 
buffers to global buffer pool and make it configurable
config: hexagon-randconfig-001-20240402 
(https://download.01.org/0day-ci/archive/20240402/202404021750.7eqaokab-...@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git 
ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): 
(https://download.01.org/0day-ci/archive/20240402/202404021750.7eqaokab-...@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 <l...@intel.com>
| Closes: 
https://lore.kernel.org/oe-kbuild-all/202404021750.7eqaokab-...@intel.com/

All errors (new ones prefixed by >>):

   In file included from fs/erofs/super.c:10:
   In file included from include/linux/fs_context.h:14:
   In file included from include/linux/security.h:35:
   In file included from include/linux/bpf.h:31:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:26:
   In file included from include/linux/kernel_stat.h:9:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   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]
           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]
           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'
   #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                     ^
   In file included from fs/erofs/super.c:10:
   In file included from include/linux/fs_context.h:14:
   In file included from include/linux/security.h:35:
   In file included from include/linux/bpf.h:31:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:26:
   In file included from include/linux/kernel_stat.h:9:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   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]
           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'
   #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                     ^
   In file included from fs/erofs/super.c:10:
   In file included from include/linux/fs_context.h:14:
   In file included from include/linux/security.h:35:
   In file included from include/linux/bpf.h:31:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:26:
   In file included from include/linux/kernel_stat.h:9:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   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]
           __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]
           __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]
           __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
>> fs/erofs/super.c:876:6: error: assigning to 'int' from incompatible type 
>> 'void'
           err = z_erofs_gbuf_init();
               ^ ~~~~~~~~~~~~~~~~~~~
   6 warnings and 1 error generated.


vim +876 fs/erofs/super.c

   850  
   851  static int __init erofs_module_init(void)
   852  {
   853          int err;
   854  
   855          erofs_check_ondisk_layout_definitions();
   856  
   857          erofs_inode_cachep = kmem_cache_create("erofs_inode",
   858                          sizeof(struct erofs_inode), 0,
   859                          SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT,
   860                          erofs_inode_init_once);
   861          if (!erofs_inode_cachep)
   862                  return -ENOMEM;
   863  
   864          err = erofs_init_shrinker();
   865          if (err)
   866                  goto shrinker_err;
   867  
   868          err = z_erofs_lzma_init();
   869          if (err)
   870                  goto lzma_err;
   871  
   872          err = z_erofs_deflate_init();
   873          if (err)
   874                  goto deflate_err;
   875  
 > 876          err = z_erofs_gbuf_init();
   877          if (err)
   878                  goto gbuf_err;
   879  
   880          err = z_erofs_init_zip_subsystem();
   881          if (err)
   882                  goto zip_err;
   883  
   884          err = erofs_init_sysfs();
   885          if (err)
   886                  goto sysfs_err;
   887  
   888          err = register_filesystem(&erofs_fs_type);
   889          if (err)
   890                  goto fs_err;
   891  
   892          return 0;
   893  
   894  fs_err:
   895          erofs_exit_sysfs();
   896  sysfs_err:
   897          z_erofs_exit_zip_subsystem();
   898  zip_err:
   899          z_erofs_gbuf_exit();
   900  gbuf_err:
   901          z_erofs_deflate_exit();
   902  deflate_err:
   903          z_erofs_lzma_exit();
   904  lzma_err:
   905          erofs_exit_shrinker();
   906  shrinker_err:
   907          kmem_cache_destroy(erofs_inode_cachep);
   908          return err;
   909  }
   910  

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