fs/f2fs/cache.c:147:5-24: WARNING: atomic_dec_and_test variation before object free at line 148.

fs/f2fs/cache.c:147:5-24: WARNING: atomic_dec_and_test variation before object free at line 148.

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f66469d9905b39d2c260a15d7d6db450f4db67c1
commit: 4e80250bcfbc689efc6fd4d1b4e9d581ac3a7ea1 f2fs: cache: implement metadata cache
date:   7 weeks ago
config: loongarch-randconfig-r2105-20261104 (https://download.01.org/0day-ci/archive/20261106/202611061201.znvqT1oN-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project e2e3d6c39cfebec9eace23629a5a103df2c79ba6)

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
| Fixes: 4e80250bcfbc ("f2fs: cache: implement metadata cache")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202611061201.znvqT1oN-lkp@intel.com/

cocci warnings: (new ones prefixed by >>)
>> fs/f2fs/cache.c:147:5-24: WARNING: atomic_dec_and_test variation before object free at line 148.

vim +147 fs/f2fs/cache.c

   143	
   144	static bool f2fs_cache_put(struct f2fs_cached_block *entry)
   145	{
   146		WARN_ON_ONCE(!f2fs_cache_refcount(entry));
 > 147		if (atomic_dec_and_test(&entry->refcount)) {
 > 148			f2fs_free_cache(entry);
   149			return true;
   150		}
   151		return false;
   152	}
   153	

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