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authorYinghai Lu <yinghai@kernel.org>2010-10-12 21:07:09 (GMT)
committerH. Peter Anvin <hpa@linux.intel.com>2010-10-12 22:37:51 (GMT)
commitc7fc2de0c83dbd2eaf759c5cd0e2b9cf1eb4df3a (patch)
treec4413e9b3bc164394c2daccf34e18e0b1d6c8811 /arch/sparc
parent8e4029ee3517084ae00fbfbcb51cc365d8857061 (diff)
downloadlinux-fsl-qoriq-c7fc2de0c83dbd2eaf759c5cd0e2b9cf1eb4df3a.tar.xz
memblock, bootmem: Round pfn properly for memory and reserved regions
We need to round memory regions correctly -- specifically, we need to round reserved region in the more expansive direction (lower limit down, upper limit up) whereas usable memory regions need to be rounded in the more restrictive direction (lower limit up, upper limit down). This introduces two set of inlines: memblock_region_memory_base_pfn() memblock_region_memory_end_pfn() memblock_region_reserved_base_pfn() memblock_region_reserved_end_pfn() Although they are antisymmetric (and therefore are technically duplicates) the use of the different inlines explicitly documents the programmer's intention. The lack of proper rounding caused a bug on ARM, which was then found to also affect other architectures. Reported-by: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <4CB4CDFD.4020105@kernel.org> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/mm/init_64.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index dc584d2..4c25727 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -1294,8 +1294,8 @@ static void __init bootmem_init_nonnuma(void)
if (!reg->size)
continue;
- start_pfn = memblock_region_base_pfn(reg);
- end_pfn = memblock_region_end_pfn(reg);
+ start_pfn = memblock_region_memory_base_pfn(reg);
+ end_pfn = memblock_region_memory_end_pfn(reg);
add_active_range(0, start_pfn, end_pfn);
}