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authorPaul Mundt <lethal@linux-sh.org>2009-04-14 06:29:07 +0900
committerPaul Mundt <lethal@linux-sh.org>2009-04-14 06:29:07 +0900
commitf499cae1e59d75d5eb24c23d47cf8986e6032c6d (patch)
tree1af6235c18391212c40116eb90b01eae8938efee /drivers/mtd/mtdbdi.c
parentfc3f55e672e1ed917dd9e215af81939cd3d717da (diff)
parent80a04d3f2f94fb68b5df05e3ac6697130bc3467a (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'drivers/mtd/mtdbdi.c')
-rw-r--r--drivers/mtd/mtdbdi.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/mtd/mtdbdi.c b/drivers/mtd/mtdbdi.c
new file mode 100644
index 00000000000..5ca5aed0b22
--- /dev/null
+++ b/drivers/mtd/mtdbdi.c
@@ -0,0 +1,43 @@
+/* MTD backing device capabilities
+ *
+ * Copyright © 2006 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/backing-dev.h>
+#include <linux/mtd/mtd.h>
+#include "internal.h"
+
+/*
+ * backing device capabilities for non-mappable devices (such as NAND flash)
+ * - permits private mappings, copies are taken of the data
+ */
+struct backing_dev_info mtd_bdi_unmappable = {
+ .capabilities = BDI_CAP_MAP_COPY,
+};
+
+/*
+ * backing device capabilities for R/O mappable devices (such as ROM)
+ * - permits private mappings, copies are taken of the data
+ * - permits non-writable shared mappings
+ */
+struct backing_dev_info mtd_bdi_ro_mappable = {
+ .capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT |
+ BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP),
+};
+
+/*
+ * backing device capabilities for writable mappable devices (such as RAM)
+ * - permits private mappings, copies are taken of the data
+ * - permits non-writable shared mappings
+ */
+struct backing_dev_info mtd_bdi_rw_mappable = {
+ .capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT |
+ BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP |
+ BDI_CAP_WRITE_MAP),
+};