+ return mtd->unpoint(mtd, from, len);
+}
+
+/*
+ * Allow NOMMU mmap() to directly map the device (if not NULL)
+ * - return the address to which the offset maps
+ * - return -ENOSYS to indicate refusal to do the mapping
+ */
+static inline unsigned long mtd_get_unmapped_area(struct mtd_info *mtd,
+ unsigned long len,
+ unsigned long offset,
+ unsigned long flags)
+{
+ if (!mtd->get_unmapped_area)
+ return -EOPNOTSUPP;
+ return mtd->get_unmapped_area(mtd, len, offset, flags);
+}
+
+static inline int mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ return mtd->read(mtd, from, len, retlen, buf);
+}
+
+static inline int mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+{
+ *retlen = 0;
+ if (!mtd->write)
+ return -EROFS;
+ return mtd->write(mtd, to, len, retlen, buf);
+}
+
+/*
+ * In blackbox flight recorder like scenarios we want to make successful writes
+ * in interrupt context. panic_write() is only intended to be called when its
+ * known the kernel is about to panic and we need the write to succeed. Since
+ * the kernel is not going to be running for much longer, this function can
+ * break locks and delay to ensure the write succeeds (but not sleep).
+ */
+static inline int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+{
+ *retlen = 0;
+ if (!mtd->panic_write)
+ return -EOPNOTSUPP;
+ return mtd->panic_write(mtd, to, len, retlen, buf);
+}
+
+static inline int mtd_read_oob(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
+{
+ ops->retlen = ops->oobretlen = 0;
+ if (!mtd->read_oob)
+ return -EOPNOTSUPP;
+ return mtd->read_oob(mtd, from, ops);
+}
+
+static inline int mtd_write_oob(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
+{
+ ops->retlen = ops->oobretlen = 0;
+ if (!mtd->write_oob)
+ return -EOPNOTSUPP;
+ return mtd->write_oob(mtd, to, ops);
+}
+
+/*
+ * Method to access the protection register area, present in some flash
+ * devices. The user data is one time programmable but the factory data is read
+ * only.
+ */
+static inline int mtd_get_fact_prot_info(struct mtd_info *mtd,
+ struct otp_info *buf, size_t len)
+{
+ if (!mtd->get_fact_prot_info)
+ return -EOPNOTSUPP;
+ return mtd->get_fact_prot_info(mtd, buf, len);
+}
+
+static inline int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from,
+ size_t len, size_t *retlen,
+ u_char *buf)
+{
+ *retlen = 0;
+ if (!mtd->read_fact_prot_reg)
+ return -EOPNOTSUPP;
+ return mtd->read_fact_prot_reg(mtd, from, len, retlen, buf);
+}
+
+static inline int mtd_get_user_prot_info(struct mtd_info *mtd,
+ struct otp_info *buf,
+ size_t len)
+{
+ if (!mtd->get_user_prot_info)
+ return -EOPNOTSUPP;
+ return mtd->get_user_prot_info(mtd, buf, len);
+}
+
+static inline int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from,
+ size_t len, size_t *retlen,
+ u_char *buf)
+{
+ *retlen = 0;
+ if (!mtd->read_user_prot_reg)
+ return -EOPNOTSUPP;
+ return mtd->read_user_prot_reg(mtd, from, len, retlen, buf);
+}
+
+static inline int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to,
+ size_t len, size_t *retlen,
+ u_char *buf)
+{
+ *retlen = 0;
+ if (!mtd->write_user_prot_reg)
+ return -EOPNOTSUPP;
+ return mtd->write_user_prot_reg(mtd, to, len, retlen, buf);
+}
+
+static inline int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
+ size_t len)
+{
+ if (!mtd->lock_user_prot_reg)
+ return -EOPNOTSUPP;
+ return mtd->lock_user_prot_reg(mtd, from, len);
+}
+
+int mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
+ unsigned long count, loff_t to, size_t *retlen);
+
+static inline void mtd_sync(struct mtd_info *mtd)
+{
+ if (mtd->sync)
+ mtd->sync(mtd);
+}
+
+/* Chip-supported device locking */
+static inline int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ if (!mtd->lock)
+ return -EOPNOTSUPP;
+ return mtd->lock(mtd, ofs, len);
+}
+
+static inline int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ if (!mtd->unlock)
+ return -EOPNOTSUPP;
+ return mtd->unlock(mtd, ofs, len);
+}
+
+static inline int mtd_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ if (!mtd->is_locked)
+ return -EOPNOTSUPP;
+ return mtd->is_locked(mtd, ofs, len);
+}
+
+static inline int mtd_suspend(struct mtd_info *mtd)
+{
+ if (!mtd->suspend)
+ return -EOPNOTSUPP;
+ return mtd->suspend(mtd);
+}
+
+static inline void mtd_resume(struct mtd_info *mtd)
+{
+ if (mtd->resume)
+ mtd->resume(mtd);
+}
+
+static inline int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs)
+{
+ if (!mtd->block_isbad)
+ return 0;
+ return mtd->block_isbad(mtd, ofs);
+}
+
+static inline int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs)
+{
+ if (!mtd->block_markbad)
+ return -EOPNOTSUPP;
+ return mtd->block_markbad(mtd, ofs);