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ARM: fix noMMU kallsyms symbol filtering

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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: b9b32bf70f ("ARM: use linker magic for vectors and vector stubs")
Cc: <stable@vger.kernel.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2014-02-26 19:40:46 +00:00
parent b363457593
commit 006fa2599b
2 changed files with 5 additions and 6 deletions
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2
arch/arm/Kconfig
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@ -1578,6 +1578,7 @@ config BL_SWITCHER_DUMMY_IF
choice
prompt "Memory split"
depends on MMU
default VMSPLIT_3G
help
Select the desired split between kernel and user memory.
@ -1595,6 +1596,7 @@ endchoice
config PAGE_OFFSET
hex
default PHYS_OFFSET if !MMU
default 0x40000000 if VMSPLIT_1G
default 0x80000000 if VMSPLIT_2G
default 0xC0000000

9
arch/arm/include/asm/memory.h
View File

@ -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)
@ -104,10 +105,6 @@
#define END_MEM (UL(CONFIG_DRAM_BASE) + CONFIG_DRAM_SIZE)
#endif
#ifndef PAGE_OFFSET
#define PAGE_OFFSET PLAT_PHYS_OFFSET
#endif
/*
* The module can be at any place in ram in nommu mode.
*/