diff --git a/fs/devfs-core.c b/fs/devfs-core.c
index d06a534..6b5e6da 100644
--- a/fs/devfs-core.c
+++ b/fs/devfs-core.c
@@ -513,3 +513,71 @@
 	free(cdev->name);
 	free(cdev);
 }
+
+static void memcpy_sz(void *dst, const void *src, size_t count, int rwsize)
+{
+	/* no rwsize specification given. Do whatever memcpy likes best */
+	if (!rwsize) {
+		memcpy(dst, src, count);
+		return;
+	}
+
+	rwsize = rwsize >> O_RWSIZE_SHIFT;
+
+	count /= rwsize;
+
+	while (count-- > 0) {
+		switch (rwsize) {
+		case 1:
+			*((u8 *)dst) = *((u8 *)src);
+			break;
+		case 2:
+			*((u16 *)dst) = *((u16 *)src);
+			break;
+		case 4:
+			*((u32  *)dst) = *((u32  *)src);
+			break;
+		case 8:
+			*((u64  *)dst) = *((u64  *)src);
+			break;
+		}
+		dst += rwsize;
+		src += rwsize;
+	}
+}
+
+ssize_t mem_read(struct cdev *cdev, void *buf, size_t count, loff_t offset,
+		 unsigned long flags)
+{
+	unsigned long size;
+	struct device_d *dev;
+
+	if (!cdev->dev || cdev->dev->num_resources < 1)
+		return -1;
+	dev = cdev->dev;
+
+	size = min((resource_size_t)count,
+			resource_size(&dev->resource[0]) -
+			(resource_size_t)offset);
+	memcpy_sz(buf, dev_get_mem_region(dev, 0) + offset, size, flags & O_RWSIZE_MASK);
+	return size;
+}
+EXPORT_SYMBOL(mem_read);
+
+ssize_t mem_write(struct cdev *cdev, const void *buf, size_t count, loff_t offset,
+		  unsigned long flags)
+{
+	unsigned long size;
+	struct device_d *dev;
+
+	if (!cdev->dev || cdev->dev->num_resources < 1)
+		return -1;
+	dev = cdev->dev;
+
+	size = min((resource_size_t)count,
+			resource_size(&dev->resource[0]) -
+			(resource_size_t)offset);
+	memcpy_sz(dev_get_mem_region(dev, 0) + offset, buf, size, flags & O_RWSIZE_MASK);
+	return size;
+}
+EXPORT_SYMBOL(mem_write);
diff --git a/fs/fs.c b/fs/fs.c
index 5135112..ca4fe70 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -1739,72 +1739,6 @@
 }
 EXPORT_SYMBOL(rmdir);
 
-static void memcpy_sz(void *dst, const void *src, size_t count, int rwsize)
-{
-	/* no rwsize specification given. Do whatever memcpy likes best */
-	if (!rwsize) {
-		memcpy(dst, src, count);
-		return;
-	}
-
-	rwsize = rwsize >> O_RWSIZE_SHIFT;
-
-	count /= rwsize;
-
-	while (count-- > 0) {
-		switch (rwsize) {
-		case 1:
-			*((u8 *)dst) = *((u8 *)src);
-			break;
-		case 2:
-			*((u16 *)dst) = *((u16 *)src);
-			break;
-		case 4:
-			*((u32  *)dst) = *((u32  *)src);
-			break;
-		case 8:
-			*((u64  *)dst) = *((u64  *)src);
-			break;
-		}
-		dst += rwsize;
-		src += rwsize;
-	}
-}
-
-ssize_t mem_read(struct cdev *cdev, void *buf, size_t count, loff_t offset, ulong flags)
-{
-	ulong size;
-	struct device_d *dev;
-
-	if (!cdev->dev || cdev->dev->num_resources < 1)
-		return -1;
-	dev = cdev->dev;
-
-	size = min((resource_size_t)count,
-			resource_size(&dev->resource[0]) -
-			(resource_size_t)offset);
-	memcpy_sz(buf, dev_get_mem_region(dev, 0) + offset, size, flags & O_RWSIZE_MASK);
-	return size;
-}
-EXPORT_SYMBOL(mem_read);
-
-ssize_t mem_write(struct cdev *cdev, const void *buf, size_t count, loff_t offset, ulong flags)
-{
-	ulong size;
-	struct device_d *dev;
-
-	if (!cdev->dev || cdev->dev->num_resources < 1)
-		return -1;
-	dev = cdev->dev;
-
-	size = min((resource_size_t)count,
-			resource_size(&dev->resource[0]) -
-			(resource_size_t)offset);
-	memcpy_sz(dev_get_mem_region(dev, 0) + offset, buf, size, flags & O_RWSIZE_MASK);
-	return size;
-}
-EXPORT_SYMBOL(mem_write);
-
 /*
  * cdev_get_mount_path - return the path a cdev is mounted on
  *