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authorWill Deacon <will.deacon@arm.com>2012-11-12 19:19:35 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2012-11-14 09:54:15 +0000
commit938edf5c04202b59b8ff01a4033e9413646b105b (patch)
tree794affc77e1b5dc33d2e99f0e5ebaefaf5e16994 /arch/arm64/mm
parent3495386b107510ba7014f42da37034648c1d2cfd (diff)
downloadlinux-938edf5c04202b59b8ff01a4033e9413646b105b.tar.gz
arm64: mm: update max_dma32 before calculating size of NORMAL zone
Commit f483a853b0b9 ("arm64: mm: fix booting on systems with no memory below 4GB") sets max_dma32 to the minimum of the maximum pfn and MAX_DMA32_PFN. This value is later used as the base of the NORMAL zone, which is incorrect when MAX_DMA32_PFN is below the minimum pfn (i.e. all memory is above 4GB). This patch fixes the problem by ensuring that max_dma32 is always set to the end of the DMA32 zone. 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.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 4cd28931dba..800aac306a0 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -79,8 +79,8 @@ 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(min, max_dma32) - min;
+ max_dma32 = max(min, min(max, MAX_DMA32_PFN));
+ zone_size[ZONE_DMA32] = max_dma32 - min;
#endif
zone_size[ZONE_NORMAL] = max - max_dma32;