mtd: introduce mtd_get_unmapped_area interface

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

5 files changed, 18 insertions, 11 deletions

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 41d64ff4c252..c51f04a00afb 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -1135,7 +1135,7 @@ static unsigned long mtdchar_get_unmapped_area(struct file *file,
                 if (offset > mtd->size - len)
                         return (unsigned long) -EINVAL;
 
-                return mtd->get_unmapped_area(mtd, len, offset, flags);
+                return mtd_get_unmapped_area(mtd, len, offset, flags);
         }
 
         /* can't map directly */
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index 76123bd49314..b3895cf20bb2 100644
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -726,8 +726,8 @@ static unsigned long concat_get_unmapped_area(struct mtd_info *mtd,
                         return (unsigned long) -EINVAL;
 
                 if (subdev->get_unmapped_area)
-                        return subdev->get_unmapped_area(subdev, len, offset,
-                                                         flags);
+                        return mtd_get_unmapped_area(subdev, len, offset,
+                                                     flags);
 
                 break;
         }
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index b09624a5497c..55a9cb544fc1 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -108,8 +108,7 @@ static unsigned long part_get_unmapped_area(struct mtd_info *mtd,
         struct mtd_part *part = PART(mtd);
 
         offset += part->offset;
-        return part->master->get_unmapped_area(part->master, len, offset,
-                                               flags);
+        return mtd_get_unmapped_area(part->master, len, offset, flags);
 }
 
 static int part_read_oob(struct mtd_info *mtd, loff_t from,
diff --git a/fs/romfs/mmap-nommu.c b/fs/romfs/mmap-nommu.c
index eed99428f104..d5168e8e7dcb 100644
--- a/fs/romfs/mmap-nommu.c
+++ b/fs/romfs/mmap-nommu.c
@@ -53,7 +53,7 @@ static unsigned long romfs_get_unmapped_area(struct file *file,
                 if (offset > mtd->size - len)
                         return (unsigned long) -EINVAL;
 
-                return mtd->get_unmapped_area(mtd, len, offset, flags);
+                return mtd_get_unmapped_area(mtd, len, offset, flags);
         }
 
 cant_map_directly:
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index a7d22b7fcb4c..f38e8276b408 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -178,11 +178,6 @@ struct mtd_info {
         int (*point) (struct mtd_info *mtd, loff_t from, size_t len,
                       size_t *retlen, void **virt, resource_size_t *phys);
         void (*unpoint) (struct mtd_info *mtd, loff_t from, size_t 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
-         */
         unsigned long (*get_unmapped_area) (struct mtd_info *mtd,
                                             unsigned long len,
                                             unsigned long offset,
@@ -293,6 +288,19 @@ 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)
+{
+        return mtd->get_unmapped_area(mtd, len, offset, flags);
+}
+
 static inline struct mtd_info *dev_to_mtd(struct device *dev)
 {
         return dev ? dev_get_drvdata(dev) : NULL;