3.8.13.21 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
commit 006fa2599bf0daf107cbb7a8a99fcfb9a998a169 upstream.
With noMMU, CONFIG_PAGE_OFFSET was not being set correctly. As there's
no MMU, PAGE_OFFSET should be equal to PHYS_OFFSET in all cases. This
commit makes that explicit.
Since we do this, we don't need to mess around in asm/memory.h with
ifdefs to sort this out, so let's get rid of that, and there's no point
offering the "Memory split" option for noMMU as that's meaningless
there.
Fixes: b9b32bf70f2f ("ARM: use linker magic for vectors and vector stubs")
Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
[ kamal: backport to 3.8 (context) ]
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
arch/arm/Kconfig | 2 ++
arch/arm/include/asm/memory.h | 9 +++------
2 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 5c037b9..4a582ab 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1596,6 +1596,7 @@ config HAVE_ARM_TWD
choice
prompt "Memory split"
+ depends on MMU
default VMSPLIT_3G
help
Select the desired split between kernel and user memory.
@@ -1613,6 +1614,7 @@ endchoice
config PAGE_OFFSET
hex
+ default PHYS_OFFSET if !MMU
default 0x40000000 if VMSPLIT_1G
default 0x80000000 if VMSPLIT_2G
default 0xC0000000
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index 1c4df27..179bf0b 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -28,14 +28,15 @@
*/
#define UL(x) _AC(x, UL)
+/* PAGE_OFFSET - the virtual address of the start of the kernel image */
+#define PAGE_OFFSET UL(CONFIG_PAGE_OFFSET)
+
#ifdef CONFIG_MMU
/*
- * PAGE_OFFSET - the virtual address of the start of the kernel image
* TASK_SIZE - the maximum size of a user space task.
* TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area
*/
-#define PAGE_OFFSET UL(CONFIG_PAGE_OFFSET)
#define TASK_SIZE (UL(CONFIG_PAGE_OFFSET) - UL(0x01000000))
#define TASK_UNMAPPED_BASE ALIGN(TASK_SIZE / 3, SZ_16M)
@@ -106,10 +107,6 @@
#define END_MEM (UL(CONFIG_DRAM_BASE) + CONFIG_DRAM_SIZE)
#endif
-#ifndef PAGE_OFFSET
-#define PAGE_OFFSET (PHYS_OFFSET)
-#endif
-
/*
* The module can be at any place in ram in nommu mode.
*/
--
1.8.3.2
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