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| author | Nicolas Pitre <nicolas.pitre@linaro.org> | 2015-09-13 04:25:26 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-09-22 09:13:57 +0200 |
| commit | 6ff0966052c46efb53980b8a1add2e7b49c9f560 (patch) | |
| tree | 7fb25013442035b048936549be4dab2efc473f6e /arch/arm/include/asm/pgtable.h | |
| parent | ARM: 8430/1: use default ioremap alignment for SMP or LPAE (diff) | |
| download | linux-6ff0966052c46efb53980b8a1add2e7b49c9f560.tar.xz linux-6ff0966052c46efb53980b8a1add2e7b49c9f560.zip | |
ARM: 8432/1: move VMALLOC_END from 0xff000000 to 0xff800000
There is a 12MB unused region in our memory map between the vmalloc and
fixmap areas. This became unused with commit e9da6e9905e6, confirmed
with commit 64d3b6a3f480.
We also have a 8MB guard area before the vmalloc area. With the default
240MB vmalloc area size and the current VMALLOC_END definition, that
means the end of low memory ends up at 0xef800000 which is unfortunate
for 768MB machines where 8MB of RAM is lost to himem.
Let's move VMALLOC_END to 0xff800000 so the guard area won't chop the
top of the 768MB low memory area while keeping the default vmalloc area
size unchanged and still preserving a gap between the vmalloc and fixmap
areas.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/pgtable.h')
| -rw-r--r-- | arch/arm/include/asm/pgtable.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h index f40354198bad..348caabb7625 100644 --- a/arch/arm/include/asm/pgtable.h +++ b/arch/arm/include/asm/pgtable.h @@ -43,7 +43,7 @@ */ #define VMALLOC_OFFSET (8*1024*1024) #define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1)) -#define VMALLOC_END 0xff000000UL +#define VMALLOC_END 0xff800000UL #define LIBRARY_TEXT_START 0x0c000000 |