net: remove mm.h inclusion from netdevice.h

Remove linux/mm.h inclusion from netdevice.h -- it's unused (I've checked manually).

To prevent mm.h inclusion via other channels also extract "enum dma_data_direction"
definition into separate header. This tiny piece is what gluing netdevice.h with mm.h
via "netdevice.h => dmaengine.h => dma-mapping.h => scatterlist.h => mm.h".
Removal of mm.h from scatterlist.h was tried and was found not feasible
on most archs, so the link was cutoff earlier.

Hope people are OK with tiny include file.

Note, that mm_types.h is still dragged in, but it is a separate story.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/can/janz-ican3.c b/drivers/net/can/janz-ican3.c
index f1942cab35f6..32778d56d330 100644
--- a/drivers/net/can/janz-ican3.c
+++ b/drivers/net/can/janz-ican3.c
@@ -22,6 +22,7 @@
 #include <linux/can/error.h>
 
 #include <linux/mfd/janz.h>
+#include <asm/io.h>
 
 /* the DPM has 64k of memory, organized into 256x 256 byte pages */
 #define DPM_NUM_PAGES           256
diff --git a/drivers/net/can/softing/softing_fw.c b/drivers/net/can/softing/softing_fw.c
index b520784fb197..310596175676 100644
--- a/drivers/net/can/softing/softing_fw.c
+++ b/drivers/net/can/softing/softing_fw.c
@@ -20,6 +20,7 @@
 #include <linux/firmware.h>
 #include <linux/sched.h>
 #include <asm/div64.h>
+#include <asm/io.h>
 
 #include "softing.h"
 
diff --git a/drivers/net/can/softing/softing_main.c b/drivers/net/can/softing/softing_main.c
index 60a49e5a2a53..954b2959b6b2 100644
--- a/drivers/net/can/softing/softing_main.c
+++ b/drivers/net/can/softing/softing_main.c
@@ -21,6 +21,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <asm/io.h>
 
 #include "softing.h"