tree: git://git.infradead.org/users/hch/block.git blkdev.h-includes head: 03cf53fd6d35d1ca10aea68ddadbe896f6405f3f commit: da5bae30b9c382a015b31a976c5622ecdd98af30 [2/17] mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h> config: x86_64-randconfig-a012-20210912 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): git remote add hch-block git://git.infradead.org/users/hch/block.git git fetch --no-tags hch-block blkdev.h-includes git checkout da5bae30b9c382a015b31a976c5622ecdd98af30 # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash fs/f2fs/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): 562 | module_param(num_compress_pages, uint, 0444); | ^~~~~ | ) 563 | MODULE_PARM_DESC(num_compress_pages, | ^ | ) 564 | "Number of intermediate compress pages to preallocate"); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +562 fs/f2fs/compress.c 4c8ff7095bef64 Chao Yu 2019-11-01 559 99bbe307013059 Jaegeuk Kim 2020-06-16 560 static mempool_t *compress_page_pool; 5e6bbde9598230 Chao Yu 2020-04-08 561 static int num_compress_pages = 512; 5e6bbde9598230 Chao Yu 2020-04-08 @562 module_param(num_compress_pages, uint, 0444); 5e6bbde9598230 Chao Yu 2020-04-08 @563 MODULE_PARM_DESC(num_compress_pages, 5e6bbde9598230 Chao Yu 2020-04-08 564 "Number of intermediate compress pages to preallocate"); 5e6bbde9598230 Chao Yu 2020-04-08 565 :::::: The code at line 562 was first introduced by commit :::::: 5e6bbde95982300d66d78fb282d4ee39df78fc33 f2fs: introduce mempool for {,de}compress intermediate page allocation :::::: TO: Chao Yu <yuchao0(a)huawei.com&gt; :::::: CC: Jaegeuk Kim <jaegeuk(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org