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authorWill Deacon <will.deacon@arm.com>2012-11-08 16:00:16 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2012-11-08 16:06:21 +0000
commitf483a853b0b932a1d75eb27a1dcbd732862260db (patch)
tree1954e6938eed2c2b20776b1159f001f9df071dd3 /arch/arm64/mm
parentb3770b3252589240e50f560197a19531979abba2 (diff)
downloadlinux-f483a853b0b932a1d75eb27a1dcbd732862260db.tar.gz
arm64: mm: fix booting on systems with no memory below 4GB
Booting on a system with all of its memory above the 4GB boundary breaks for two reasons: (1) We still try to create a non-empty DMA32 zone (2) no-bootmem limits allocations to 0xffffffff This patch fixes these issues for ARM64. Tested-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/mm')
-rw-r--r--arch/arm64/mm/init.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index efbf7df05d3..4cd28931dba 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -80,7 +80,7 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max)
#ifdef CONFIG_ZONE_DMA32
/* 4GB maximum for 32-bit only capable devices */
max_dma32 = min(max, MAX_DMA32_PFN);
- zone_size[ZONE_DMA32] = max_dma32 - min;
+ zone_size[ZONE_DMA32] = max(min, max_dma32) - min;
#endif
zone_size[ZONE_NORMAL] = max - max_dma32;