[3.11.y.z extended stable] Patch "ARM: fix noMMU kallsyms symbol filtering" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    ARM: fix noMMU kallsyms symbol filtering

to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.11.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 1ae7e742516c8fe8551dc98f94241ad32630a777 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel at arm.linux.org.uk>
Date: Wed, 26 Feb 2014 19:40:46 +0000
Subject: ARM: fix noMMU kallsyms symbol filtering

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 at arm.linux.org.uk>
[ luis: backported to 3.11: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 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 43594d5..170ac09 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1540,6 +1540,7 @@ config MCPM

 choice
 	prompt "Memory split"
+	depends on MMU
 	default VMSPLIT_3G
 	help
 	  Select the desired split between kernel and user memory.
@@ -1557,6 +1558,7 @@ 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 e750a93..bcc49dc 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -30,14 +30,15 @@
  */
 #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(SZ_16M))
 #define TASK_UNMAPPED_BASE	ALIGN(TASK_SIZE / 3, SZ_16M)

@@ -108,10 +109,6 @@
 #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.
  */
--
1.9.0