linux-kernel - [PATCH] mtd: allow mtd and jffs2 when ARCH=um

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Message-ID: <20101220140454.GA26229@falooley.org>
Date:	Mon, 20 Dec 2010 09:04:54 -0500
From:	Jason Lunz <lunz@....org>
To:	Artem Bityutskiy <dedekind1@...il.com>
Cc:	Anatolij Gustschin <agust@...x.de>,
	lkml <linux-kernel@...r.kernel.org>,
	linux-mtd@...ts.infradead.org
Subject: [PATCH] mtd: allow mtd and jffs2 when ARCH=um

On Mon, Dec 20, 2010 at 01:23:36PM +0200, Artem Bityutskiy wrote:
> Ok, could you please re-sent the final patch with the commit message
> etc?

Sure, here's everything as a single patch.

------------------------------------->8
Allow parts of drivers/mtd to compile on uml by pushing the HAS_IOMEM
dependencies down closer to the parts of mtd that actually need it.
This allows enough of mtd to build to let jffs2 be used on uml.

Signed-off-by: Jason Lunz <lunz@....org>
---
 arch/um/Kconfig.rest |    4 +---
 drivers/mtd/Kconfig  |    8 ++++++--
 drivers/mtd/Makefile |    3 ++-
 3 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/arch/um/Kconfig.rest b/arch/um/Kconfig.rest
index 0ccad0f..e34f399 100644
--- a/arch/um/Kconfig.rest
+++ b/arch/um/Kconfig.rest
@@ -28,9 +28,7 @@ source "drivers/scsi/Kconfig"
 
 source "drivers/md/Kconfig"
 
-if BROKEN
-	source "drivers/mtd/Kconfig"
-endif
+source "drivers/mtd/Kconfig"
 
 source "drivers/leds/Kconfig"
 
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
index 7741470..603e447 100644
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -1,6 +1,5 @@
 menuconfig MTD
 	tristate "Memory Technology Device (MTD) support"
-	depends on HAS_IOMEM
 	help
 	  Memory Technology Devices are flash, RAM and similar chips, often
 	  used for solid state file systems on embedded devices. This option
@@ -178,6 +177,7 @@ comment "User Modules And Translation Layers"
 
 config MTD_CHAR
 	tristate "Direct char device access to MTD devices"
+	depends on HAS_IOMEM
 	help
 	  This provides a character device for each MTD device present in
 	  the system, allowing the user to read and write directly to the
@@ -310,7 +310,7 @@ config SSFDC
 
 config SM_FTL
 	tristate "SmartMedia/xD new translation layer"
-	depends on EXPERIMENTAL && BLOCK
+	depends on EXPERIMENTAL && BLOCK && HAS_IOMEM
 	select MTD_BLKDEVS
 	select MTD_NAND_ECC
 	help
@@ -333,6 +333,8 @@ config MTD_OOPS
 	  To use, add console=ttyMTDx to the kernel command line,
 	  where x is the MTD device number to use.
 
+if HAS_IOMEM
+
 source "drivers/mtd/chips/Kconfig"
 
 source "drivers/mtd/maps/Kconfig"
@@ -345,6 +347,8 @@ source "drivers/mtd/onenand/Kconfig"
 
 source "drivers/mtd/lpddr/Kconfig"
 
+endif # HAS_IOMEM
+
 source "drivers/mtd/ubi/Kconfig"
 
 endif # MTD
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
index d4e7f25..c83eee4 100644
--- a/drivers/mtd/Makefile
+++ b/drivers/mtd/Makefile
@@ -30,6 +30,7 @@ obj-$(CONFIG_MTD_OOPS)		+= mtdoops.o
 nftl-objs		:= nftlcore.o nftlmount.o
 inftl-objs		:= inftlcore.o inftlmount.o
 
-obj-y		+= chips/ lpddr/ maps/ devices/ nand/ onenand/ tests/
+obj-y			+= tests/
+obj-$(CONFIG_HAS_IOMEM)	+= chips/ lpddr/ maps/ devices/ nand/ onenand/
 
 obj-$(CONFIG_MTD_UBI)		+= ubi/
-- 
1.7.2.3

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