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authorNicolas Pitre <nicolas.pitre@linaro.org>2015-09-13 03:25:26 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2015-09-22 08:13:57 +0100
commit6ff0966052c46efb53980b8a1add2e7b49c9f560 (patch)
tree7fb25013442035b048936549be4dab2efc473f6e /arch/arm/include
parent803e3dbcb4cf80c898faccf01875f6ff6e5e76fd (diff)
downloadlinux-linaro-stable-6ff0966052c46efb53980b8a1add2e7b49c9f560.tar.gz
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')
-rw-r--r--arch/arm/include/asm/pgtable.h2
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