Hi Charan, Thank you for the patch! Yet something to improve: [auto build test ERROR on hnaz-mm/master] url: https://github.com/0day-ci/linux/commits/Charan-Teja-Reddy/mm-shmem-implement-POSIX_FADV_-WILL-DONT-NEED-for-shmem/20220105-230604 base: https://github.com/hnaz/linux-mm master config: hexagon-randconfig-r013-20220105 (https://download.01.org/0day-ci/archive/20220106/202201061353.4vrJlOAk-lkp@xxxxxxxxx/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d5b6e30ed3acad794dd0aec400e617daffc6cc3d) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/6bdb2636187d2f6cb78d6cdc05f2b7e0b79c750a git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Charan-Teja-Reddy/mm-shmem-implement-POSIX_FADV_-WILL-DONT-NEED-for-shmem/20220105-230604 git checkout 6bdb2636187d2f6cb78d6cdc05f2b7e0b79c750a # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> mm/shmem.c:4000:13: error: use of undeclared identifier 'shmem_fadvise'; did you mean 'shmem_file'? .fadvise = shmem_fadvise, ^~~~~~~~~~~~~ shmem_file include/linux/shmem_fs.h:118:20: note: 'shmem_file' declared here static inline bool shmem_file(struct file *file) ^ >> mm/shmem.c:4000:13: error: incompatible function pointer types initializing 'int (*)(struct file *, loff_t, loff_t, int)' (aka 'int (*)(struct file *, long long, long long, int)') with an expression of type 'bool (struct file *)' (aka '_Bool (struct file *)') [-Werror,-Wincompatible-function-pointer-types] .fadvise = shmem_fadvise, ^~~~~~~~~~~~~ 2 errors generated. vim +4000 mm/shmem.c 3987 3988 static const struct file_operations shmem_file_operations = { 3989 .mmap = shmem_mmap, 3990 .get_unmapped_area = shmem_get_unmapped_area, 3991 #ifdef CONFIG_TMPFS 3992 .llseek = shmem_file_llseek, 3993 .read_iter = shmem_file_read_iter, 3994 .write_iter = generic_file_write_iter, 3995 .fsync = noop_fsync, 3996 .splice_read = generic_file_splice_read, 3997 .splice_write = iter_file_splice_write, 3998 .fallocate = shmem_fallocate, 3999 #endif > 4000 .fadvise = shmem_fadvise, 4001 }; 4002 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx