Hi Park, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [cannot apply to v5.3 next-20190917] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Park-Ju-Hyung/staging-exfat-rebase-to-sdFAT-v2-2-0/20190919-040526 config: x86_64-allyesconfig (attached as .config) compiler: gcc-7 (Debian 7.4.0-13) 7.4.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot All errors (new ones prefixed by >>): drivers/staging/exfat/super.c: In function 'exfat_debug_kill_sb': >> drivers/staging/exfat/super.c:3079:4: error: implicit declaration of function 'exfat_cache_release'; did you mean 'exfat_dcache_release'? [-Werror=implicit-function-declaration] exfat_cache_release(sb); ^~~~~~~~~~~~~~~~~~~ exfat_dcache_release cc1: some warnings being treated as errors -- drivers/staging/exfat/misc.c: In function 'exfat_uevent_ro_remount': >> drivers/staging/exfat/misc.c:57:2: error: implicit declaration of function 'ST_LOG'; did you mean 'DT_REG'? [-Werror=implicit-function-declaration] ST_LOG("[EXFAT](%s[%d:%d]): Uevent triggered\n", ^~~~~~ DT_REG cc1: some warnings being treated as errors vim +3079 drivers/staging/exfat/super.c 3063 3064 #ifdef CONFIG_EXFAT_DBG_IOCTL 3065 static void exfat_debug_kill_sb(struct super_block *sb) 3066 { 3067 struct exfat_sb_info *sbi = EXFAT_SB(sb); 3068 struct block_device *bdev = sb->s_bdev; 3069 3070 long flags; 3071 3072 if (sbi) { 3073 flags = sbi->debug_flags; 3074 3075 if (flags & EXFAT_DEBUGFLAGS_INVALID_UMOUNT) { 3076 /* invalidate_bdev drops all device cache include dirty. 3077 * we use this to simulate device removal 3078 */ > 3079 exfat_cache_release(sb); 3080 invalidate_bdev(bdev); 3081 } 3082 } 3083 3084 kill_block_super(sb); 3085 } 3086 #endif /* CONFIG_EXFAT_DBG_IOCTL */ 3087 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation