Re: [PATCH v7 07/10] ref_tracker: add a way to create a symlink to the ref_tracker_dir debugfs file

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

Hi Jeff,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 5bc1018675ec28a8a60d83b378d8c3991faa5a27]

url:    https://github.com/intel-lab-lkp/linux/commits/Jeff-Layton/ref_tracker-don-t-use-pK-in-pr_ostream-output/20250506-013822
base:   5bc1018675ec28a8a60d83b378d8c3991faa5a27
patch link:    https://lore.kernel.org/r/20250505-reftrack-dbgfs-v7-7-f78c5d97bcca%40kernel.org
patch subject: [PATCH v7 07/10] ref_tracker: add a way to create a symlink to the ref_tracker_dir debugfs file
config: s390-allnoconfig (https://download.01.org/0day-ci/archive/20250507/202505071434.YWUTBcYu-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250507/202505071434.YWUTBcYu-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/202505071434.YWUTBcYu-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from fs/proc/namespaces.c:8:
   In file included from include/net/net_namespace.h:40:
   In file included from include/net/net_trackers.h:4:
>> include/linux/ref_tracker.h:124:15: warning: attribute declaration must precede definition [-Wignored-attributes]
     124 | static inline __ostream_printf
         |               ^
   include/linux/ref_tracker.h:9:26: note: expanded from macro '__ostream_printf'
       9 | #define __ostream_printf __printf(2, 3)
         |                          ^
   include/linux/compiler_attributes.h:158:56: note: expanded from macro '__printf'
     158 | #define __printf(a, b)                  __attribute__((__format__(printf, a, b)))
         |                                                        ^
   include/linux/ref_tracker.h:87:20: note: previous definition is here
      87 | static inline void ref_tracker_dir_symlink(struct ref_tracker_dir *dir, const char *fmt, ...)
         |                    ^
   include/linux/ref_tracker.h:125:6: error: redefinition of 'ref_tracker_dir_symlink'
     125 | void ref_tracker_dir_symlink(struct ref_tracker_dir *dir, const char *fmt, ...)
         |      ^
   include/linux/ref_tracker.h:87:20: note: previous definition is here
      87 | static inline void ref_tracker_dir_symlink(struct ref_tracker_dir *dir, const char *fmt, ...)
         |                    ^
   In file included from fs/proc/namespaces.c:8:
   In file included from include/net/net_namespace.h:43:
   In file included from include/linux/skbuff.h:28:
   In file included from include/linux/dma-mapping.h:5:
   In file included from include/linux/device.h:32:
   In file included from include/linux/device/driver.h:21:
   In file included from include/linux/module.h:19:
   In file included from include/linux/elf.h:6:
   In file included from arch/s390/include/asm/elf.h:165:
   include/linux/compat.h:454:22: warning: array index 3 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
     454 |         case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
         |                             ^        ~
   arch/s390/include/asm/signal.h:22:9: note: array 'sig' declared here
      22 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from fs/proc/namespaces.c:8:
   In file included from include/net/net_namespace.h:43:
   In file included from include/linux/skbuff.h:28:
   In file included from include/linux/dma-mapping.h:5:
   In file included from include/linux/device.h:32:
   In file included from include/linux/device/driver.h:21:
   In file included from include/linux/module.h:19:
   In file included from include/linux/elf.h:6:
   In file included from arch/s390/include/asm/elf.h:165:
   include/linux/compat.h:454:10: warning: array index 7 is past the end of the array (that has type 'compat_sigset_word[2]' (aka 'unsigned int[2]')) [-Warray-bounds]
     454 |         case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
         |                 ^     ~
   include/linux/compat.h:130:2: note: array 'sig' declared here
     130 |         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
         |         ^
   include/linux/compat.h:454:42: warning: array index 6 is past the end of the array (that has type 'compat_sigset_word[2]' (aka 'unsigned int[2]')) [-Warray-bounds]
     454 |         case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
         |                                                 ^     ~
   include/linux/compat.h:130:2: note: array 'sig' declared here
     130 |         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
         |         ^
   include/linux/compat.h:454:53: warning: array index 3 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
     454 |         case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
         |                                                            ^        ~
   arch/s390/include/asm/signal.h:22:9: note: array 'sig' declared here
      22 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from fs/proc/namespaces.c:8:
   In file included from include/net/net_namespace.h:43:
   In file included from include/linux/skbuff.h:28:
   In file included from include/linux/dma-mapping.h:5:
   In file included from include/linux/device.h:32:
   In file included from include/linux/device/driver.h:21:
   In file included from include/linux/module.h:19:
   In file included from include/linux/elf.h:6:
   In file included from arch/s390/include/asm/elf.h:165:
   include/linux/compat.h:456:22: warning: array index 2 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
     456 |         case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
         |                             ^        ~
   arch/s390/include/asm/signal.h:22:9: note: array 'sig' declared here
      22 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from fs/proc/namespaces.c:8:
   In file included from include/net/net_namespace.h:43:
   In file included from include/linux/skbuff.h:28:
   In file included from include/linux/dma-mapping.h:5:
   In file included from include/linux/device.h:32:
   In file included from include/linux/device/driver.h:21:
   In file included from include/linux/module.h:19:
   In file included from include/linux/elf.h:6:
   In file included from arch/s390/include/asm/elf.h:165:
   include/linux/compat.h:456:10: warning: array index 5 is past the end of the array (that has type 'compat_sigset_word[2]' (aka 'unsigned int[2]')) [-Warray-bounds]
     456 |         case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
         |                 ^     ~
   include/linux/compat.h:130:2: note: array 'sig' declared here
     130 |         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
         |         ^
   include/linux/compat.h:456:42: warning: array index 4 is past the end of the array (that has type 'compat_sigset_word[2]' (aka 'unsigned int[2]')) [-Warray-bounds]
     456 |         case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
         |                                                 ^     ~
   include/linux/compat.h:130:2: note: array 'sig' declared here
     130 |         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
         |         ^
   include/linux/compat.h:456:53: warning: array index 2 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
     456 |         case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
         |                                                            ^        ~
   arch/s390/include/asm/signal.h:22:9: note: array 'sig' declared here
      22 |         unsigned long sig[_NSIG_WORDS];
--
   In file included from fs/proc/proc_sysctl.c:17:
   In file included from include/linux/bpf-cgroup.h:11:
   In file included from include/net/sock.h:46:
   In file included from include/linux/netdevice.h:38:
   In file included from include/net/net_namespace.h:40:
   In file included from include/net/net_trackers.h:4:
>> include/linux/ref_tracker.h:124:15: warning: attribute declaration must precede definition [-Wignored-attributes]
     124 | static inline __ostream_printf
         |               ^
   include/linux/ref_tracker.h:9:26: note: expanded from macro '__ostream_printf'
       9 | #define __ostream_printf __printf(2, 3)
         |                          ^
   include/linux/compiler_attributes.h:158:56: note: expanded from macro '__printf'
     158 | #define __printf(a, b)                  __attribute__((__format__(printf, a, b)))
         |                                                        ^
   include/linux/ref_tracker.h:87:20: note: previous definition is here
      87 | static inline void ref_tracker_dir_symlink(struct ref_tracker_dir *dir, const char *fmt, ...)
         |                    ^
   include/linux/ref_tracker.h:125:6: error: redefinition of 'ref_tracker_dir_symlink'
     125 | void ref_tracker_dir_symlink(struct ref_tracker_dir *dir, const char *fmt, ...)
         |      ^
   include/linux/ref_tracker.h:87:20: note: previous definition is here
      87 | static inline void ref_tracker_dir_symlink(struct ref_tracker_dir *dir, const char *fmt, ...)
         |                    ^
   1 warning and 1 error generated.


vim +124 include/linux/ref_tracker.h

   123	
 > 124	static inline __ostream_printf
   125	void ref_tracker_dir_symlink(struct ref_tracker_dir *dir, const char *fmt, ...)
   126	{
   127	}
   128	#endif
   129	

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