Merge commit 'origin/queue' into for-queue

Conflicts:
	arch/powerpc/include/asm/Kbuild
	arch/powerpc/include/uapi/asm/Kbuild

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c
index 2e6fb6831d55..6f19acadb06c 100644
--- a/drivers/mtd/maps/physmap_of.c
+++ b/drivers/mtd/maps/physmap_of.c
@@ -169,6 +169,7 @@ static int __devinit of_flash_probe(struct platform_device *dev)
 	struct mtd_info **mtd_list = NULL;
 	resource_size_t res_size;
 	struct mtd_part_parser_data ppdata;
+	bool map_indirect;
 
 	match = of_match_device(of_flash_match, &dev->dev);
 	if (!match)
@@ -192,6 +193,8 @@ static int __devinit of_flash_probe(struct platform_device *dev)
 	}
 	count /= reg_tuple_size;
 
+	map_indirect = of_property_read_bool(dp, "no-unaligned-direct-access");
+
 	err = -ENOMEM;
 	info = kzalloc(sizeof(struct of_flash) +
 		       sizeof(struct of_flash_list) * count, GFP_KERNEL);
@@ -247,6 +250,17 @@ static int __devinit of_flash_probe(struct platform_device *dev)
 
 		simple_map_init(&info->list[i].map);
 
+		/*
+		 * On some platforms (e.g. MPC5200) a direct 1:1 mapping
+		 * may cause problems with JFFS2 usage, as the local bus (LPB)
+		 * doesn't support unaligned accesses as implemented in the
+		 * JFFS2 code via memcpy(). By setting NO_XIP, the
+		 * flash will not be exposed directly to the MTD users
+		 * (e.g. JFFS2) any more.
+		 */
+		if (map_indirect)
+			info->list[i].map.phys = NO_XIP;
+
 		if (probe_type) {
 			info->list[i].mtd = do_map_probe(probe_type,
 							 &info->list[i].map);