linux-kernel - [PATCH] drivers: uio: Kconfig: add MMU dependancy for UIO

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Date:	Fri, 30 Aug 2013 13:01:45 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	hjk@...sjkoch.de
CC:	Greg KH <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH]  drivers: uio: Kconfig: add MMU dependancy for UIO

The User space I/O drivers are useful, only when user space meaningful
(MMU must be enabled).

So need let it depend on MMU, or can not pass compiling, the related
error (allmodconfig for H8300):

    CC [M]  drivers/uio/uio.o
  drivers/uio/uio.c: In function 'uio_mmap_physical':
  drivers/uio/uio.c:650:2: error: implicit declaration of function 'pgprot_noncached' [-Werror=implicit-function-declaration]
  drivers/uio/uio.c:650:20: error: incompatible types when assigning to type 'pgprot_t' from type 'int'


Signed-off-by: Chen Gang <gang.chen@...anux.com>
---
 drivers/uio/Kconfig |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig
index a81d163..f91ec11 100644
--- a/drivers/uio/Kconfig
+++ b/drivers/uio/Kconfig
@@ -1,5 +1,6 @@
 menuconfig UIO
 	tristate "Userspace I/O drivers"
+	depends on MMU
 	help
 	  Enable this to allow the userspace driver core code to be
 	  built.  This code allows userspace programs easy access to
-- 
1.7.7.6
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