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* [viro-vfs:work.dcache 16/16] fs/dcache.c:1081:27: error: passing 'struct list_head' to parameter of incompatible type 'struct list_head *'; take the address with &
@ 2023-11-04  3:29 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2023-11-04  3:29 UTC (permalink / raw)
  To: Al Viro; +Cc: llvm, oe-kbuild-all, linux-fsdevel

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.dcache
head:   e565b3bc8b39fae7d3c4093e012df87ba1eed599
commit: e565b3bc8b39fae7d3c4093e012df87ba1eed599 [16/16] d_prune_aliases(): use a shrink list
config: um-allnoconfig (https://download.01.org/0day-ci/archive/20231104/202311041152.XK4svsNI-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231104/202311041152.XK4svsNI-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/202311041152.XK4svsNI-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from fs/dcache.c:31:
   In file included from include/linux/memblock.h:13:
   In file included from arch/um/include/asm/dma.h:5:
   In file included from arch/um/include/asm/io.h:24:
   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 fs/dcache.c:31:
   In file included from include/linux/memblock.h:13:
   In file included from arch/um/include/asm/dma.h:5:
   In file included from arch/um/include/asm/io.h:24:
   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 fs/dcache.c:31:
   In file included from include/linux/memblock.h:13:
   In file included from arch/um/include/asm/dma.h:5:
   In file included from arch/um/include/asm/io.h:24:
   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);
         |                 ~~~~~~~~~~ ^
>> fs/dcache.c:1081:27: error: passing 'struct list_head' to parameter of incompatible type 'struct list_head *'; take the address with &
    1081 |                         to_shrink_list(dentry, dispose);
         |                                                ^~~~~~~
         |                                                &
   fs/dcache.c:898:69: note: passing argument to parameter 'list' here
     898 | static void to_shrink_list(struct dentry *dentry, struct list_head *list)
         |                                                                     ^
   fs/dcache.c:1085:21: error: passing 'struct list_head' to parameter of incompatible type 'struct list_head *'; take the address with &
    1085 |         shrink_dentry_list(dispose);
         |                            ^~~~~~~
         |                            &
   fs/internal.h:209:50: note: passing argument to parameter here
     209 | extern void shrink_dentry_list(struct list_head *);
         |                                                  ^
   12 warnings and 2 errors generated.


vim +1081 fs/dcache.c

  1067	
  1068	/*
  1069	 *	Try to kill dentries associated with this inode.
  1070	 * WARNING: you must own a reference to inode.
  1071	 */
  1072	void d_prune_aliases(struct inode *inode)
  1073	{
  1074		LIST_HEAD(dispose);
  1075		struct dentry *dentry;
  1076	
  1077		spin_lock(&inode->i_lock);
  1078		hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
  1079			spin_lock(&dentry->d_lock);
  1080			if (!dentry->d_lockref.count)
> 1081				to_shrink_list(dentry, dispose);
  1082			spin_unlock(&dentry->d_lock);
  1083		}
  1084		spin_unlock(&inode->i_lock);
  1085		shrink_dentry_list(dispose);
  1086	}
  1087	EXPORT_SYMBOL(d_prune_aliases);
  1088	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

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