linux-kernel - Re: [PATCH 2/4] pktcdvd: kill mutex_lock

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Date: Sun, 28 Jan 2024 12:29:51 +0800
From: kernel test robot <lkp@...el.com>
To: Kent Overstreet <kent.overstreet@...ux.dev>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev,
	Kent Overstreet <kent.overstreet@...ux.dev>, peterz@...radead.org,
	boqun.feng@...il.com, linux-block@...r.kernel.org,
	Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH 2/4] pktcdvd: kill mutex_lock_nested() usage

Hi Kent,

kernel test robot noticed the following build errors:

[auto build test ERROR on tip/locking/core]
[also build test ERROR on net/main net-next/main linus/master v6.8-rc1 next-20240125]
[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/Kent-Overstreet/fs-pipe-Convert-to-lockdep_cmp_fn/20240127-101832
base:   tip/locking/core
patch link:    https://lore.kernel.org/r/20240127020833.487907-3-kent.overstreet%40linux.dev
patch subject: [PATCH 2/4] pktcdvd: kill mutex_lock_nested() usage
config: mips-randconfig-r063-20240127 (https://download.01.org/0day-ci/archive/20240128/202401281210.ZqZ0bZlb-lkp@intel.com/config)
compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240128/202401281210.ZqZ0bZlb-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401281210.ZqZ0bZlb-lkp@intel.com/

All errors (new ones prefixed by >>):

>> kernel/locking/lockdep.c:4925:9: error: call to undeclared function 'cmp_int'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
           return cmp_int((unsigned long) a, (unsigned long) b);
                  ^
   kernel/locking/lockdep.c:4925:9: note: did you mean 'smp_init'?
   include/linux/smp.h:225:20: note: 'smp_init' declared here
   static inline void smp_init(void) { }
                      ^
   1 error generated.


vim +/cmp_int +4925 kernel/locking/lockdep.c

  4920	
  4921	#ifdef CONFIG_PROVE_LOCKING
  4922	int lockdep_ptr_order_cmp_fn(const struct lockdep_map *a,
  4923				     const struct lockdep_map *b)
  4924	{
> 4925		return cmp_int((unsigned long) a, (unsigned long) b);
  4926	}
  4927	

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