[PATCH 0/2] mm: memblock: Couple of kbuild fixes after the memblock series

[PATCH 0/2] mm: memblock: Couple of kbuild fixes after the memblock series

[Santosh Shilimkar]

Andrew,

Thanks to kbuild which almost covers all the architectures builds, couple
of build related issues poped up after the memblock series applied [1]

This series tries to address those build issues.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>

Grygorii Strashko (2):
  mm/ARM: dma: fix conflicting types for 'arm_dma_zone_size'
  mm/memblock: fix buld of "cris" arch

 arch/arm/include/asm/dma.h |    2 +-
 include/linux/bootmem.h    |    1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

Regards,
Santosh

[1] https://lkml.org/lkml/2013/12/9/715 
-- 
1.7.9.5

[PATCH 1/2] mm/ARM: dma: fix conflicting types for 'arm_dma_zone_size'

[Santosh Shilimkar]

From: Grygorii Strashko <grygorii.strashko@ti.com>

Commit 364230b9 "ARM: use phys_addr_t for DMA zone sizes" changes
type of arm_dma_zone_size to phys_addr_t, but misses to update
external definition of it in in arch/arm/include/asm/dma.h.
As result, kernel build is failed if CONFIG_ZONE_DMA is enabled:

arch/arm/mm/init.c:202:13: error: conflicting types for 'arm_dma_zone_size'
include/linux/bootmem.h:258:66: note: previous declaration of 'arm_dma_zone_size' was here

Hence, fix external definition of arm_dma_zone_size.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
---
 arch/arm/include/asm/dma.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h
index 58b8c6a..1439b80 100644
--- a/arch/arm/include/asm/dma.h
+++ b/arch/arm/include/asm/dma.h
@@ -8,7 +8,7 @@
 #define MAX_DMA_ADDRESS	0xffffffffUL
 #else
 #define MAX_DMA_ADDRESS	({ \
-	extern unsigned long arm_dma_zone_size; \
+	extern phys_addr_t arm_dma_zone_size; \
 	arm_dma_zone_size ? \
 		(PAGE_OFFSET + arm_dma_zone_size) : 0xffffffffUL; })
 #endif
-- 
1.7.9.5

[PATCH 2/2] mm/memblock: fix buld of "cris" arch

[Santosh Shilimkar]

From: Grygorii Strashko <grygorii.strashko@ti.com>

The build of "criss" arch is broken after applying new memblock API
series.

In file included from arch/cris/mm/init.c:13:0:
include/linux/bootmem.h: In function 'memblock_virt_alloc':
include/linux/bootmem.h:229:55: error: 'KSEG_C' undeclared (first use in this function)
include/linux/bootmem.h:229:55: note: each undeclared identifier is reported only once for each function it appears in
include/linux/bootmem.h: In function 'memblock_virt_alloc_nopanic':
include/linux/bootmem.h:237:63: error: 'KSEG_C' undeclared (first use in this function)
include/linux/bootmem.h: In function 'memblock_virt_alloc_node':
include/linux/bootmem.h:250:27: error: 'KSEG_C' undeclared (first use in this function)
include/linux/bootmem.h: In function 'memblock_virt_alloc_node_nopanic':
include/linux/bootmem.h:258:28: error: 'KSEG_C' undeclared (first use in this function)

In file included from mm/bootmem.c:14:0:
include/linux/bootmem.h: In function 'memblock_virt_alloc':
include/linux/bootmem.h:229:55: error: 'KSEG_C' undeclared (first use in this function)
include/linux/bootmem.h:229:55: note: each undeclared identifier is reported only once for each function it appears in
include/linux/bootmem.h: In function 'memblock_virt_alloc_nopanic':
include/linux/bootmem.h:237:63: error: 'KSEG_C' undeclared (first use in this function)
include/linux/bootmem.h: In function 'memblock_virt_alloc_node':
include/linux/bootmem.h:250:27: error: 'KSEG_C' undeclared (first use in this function)

The "cris" arch defines memory parameters in a different manner than other
arch's and they are splitted between 2 headers: <asm/page.h> and <asm/mmu.h>

As result, now build is failed if "bootmem.h" included before
<asm/page.h> and <asm/mmu.h>. Hence, fix it by including additional
header in bootmem.h.

Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
---
 include/linux/bootmem.h |    1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index 1c9aa0e..2fae55d 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -5,6 +5,7 @@
 #define _LINUX_BOOTMEM_H
 
 #include <linux/mmzone.h>
+#include <linux/mm_types.h>
 #include <asm/dma.h>
 
 /*
-- 
1.7.9.5

[PATCH 1/2] mm/ARM: dma: fix conflicting types for 'arm_dma_zone_size'

[Russell King - ARM Linux]

On Tue, Dec 10, 2013 at 02:29:57PM -0500, Santosh Shilimkar wrote:
> diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h
> index 58b8c6a..1439b80 100644
> --- a/arch/arm/include/asm/dma.h
> +++ b/arch/arm/include/asm/dma.h
> @@ -8,7 +8,7 @@
>  #define MAX_DMA_ADDRESS	0xffffffffUL
>  #else
>  #define MAX_DMA_ADDRESS	({ \
> -	extern unsigned long arm_dma_zone_size; \
> +	extern phys_addr_t arm_dma_zone_size; \
>  	arm_dma_zone_size ? \
>  		(PAGE_OFFSET + arm_dma_zone_size) : 0xffffffffUL; })

This is wrong.  Take a moment to look at it more closely.  What does
"PAGE_OFFSET" tell you about what its returning?

What happens if arm_dma_zone_size is greater than 1GB when PAGE_OFFSET
is at the default setting of 3GB?