+/*
+ * Erase is an asynchronous operation. Device drivers are supposed
+ * to call instr->callback() whenever the operation completes, even
+ * if it completes with a failure.
+ * Callers are supposed to pass a callback function and wait for it
+ * to be called before writing to the block.
+ */
+static inline int mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+ return mtd->erase(mtd, instr);
+}
+
+/*
+ * This stuff for eXecute-In-Place. phys is optional and may be set to NULL.
+ */
+static inline int mtd_point(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, void **virt, resource_size_t *phys)
+{
+ *retlen = 0;
+ if (!mtd->point)
+ return -EOPNOTSUPP;
+ return mtd->point(mtd, from, len, retlen, virt, phys);
+}
+
+/* We probably shouldn't allow XIP if the unpoint isn't a NULL */
+static inline void mtd_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
+{
+ 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;
+ 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;
+ 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;
+ 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)
+{
+ 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)