mtd_lock_user_prot_reg 912 drivers/mtd/mtdchar.c ret = mtd_lock_user_prot_reg(mtd, oinfo.start, oinfo.length); mtd_lock_user_prot_reg 1739 drivers/mtd/mtdcore.c EXPORT_SYMBOL_GPL(mtd_lock_user_prot_reg); mtd_lock_user_prot_reg 435 include/linux/mtd/mtd.h int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len);