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authorTejun Heo <tj@kernel.org>2011-02-16 17:11:08 +0100
committerTejun Heo <tj@kernel.org>2011-02-16 17:11:08 +0100
commit8968dab8ad90ea16ef92f2406868354ea3ab6bb9 (patch)
treee385ef373b7ab2f5f9a1457a2910a3d57d61bad7 /arch/x86/mm/numa_64.c
parent5d371b08fea80c4fb7450d31e5a4e35b438ef850 (diff)
downloadop-kernel-dev-8968dab8ad90ea16ef92f2406868354ea3ab6bb9.zip
op-kernel-dev-8968dab8ad90ea16ef92f2406868354ea3ab6bb9.tar.gz
x86-64, NUMA: Remove %NULL @nodeids handling from compute_hash_shift()
numa_emulation() called compute_hash_shift() with %NULL @nodeids which meant identity mapping between index and nodeid. Make numa_emulation() build identity array and drop %NULL @nodeids handling from populate_memnodemap() and thus from compute_hash_shift(). This is to prepare for transition to using memblks instead. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Shaohui Zheng <shaohui.zheng@intel.com> Cc: David Rientjes <rientjes@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/mm/numa_64.c')
-rw-r--r--arch/x86/mm/numa_64.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index e211c00..243d18d 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -63,12 +63,7 @@ static int __init populate_memnodemap(const struct bootnode *nodes,
do {
if (memnodemap[addr >> shift] != NUMA_NO_NODE)
return -1;
-
- if (!nodeids)
- memnodemap[addr >> shift] = i;
- else
- memnodemap[addr >> shift] = nodeids[i];
-
+ memnodemap[addr >> shift] = nodeids[i];
addr += (1UL << shift);
} while (addr < end);
res = 1;
@@ -706,6 +701,7 @@ static int __init split_nodes_size_interleave(u64 addr, u64 max_addr, u64 size)
static int __init numa_emulation(unsigned long start_pfn,
unsigned long last_pfn, int acpi, int amd)
{
+ static int nodeid[NR_NODE_MEMBLKS] __initdata;
u64 addr = start_pfn << PAGE_SHIFT;
u64 max_addr = last_pfn << PAGE_SHIFT;
int num_nodes;
@@ -730,7 +726,11 @@ static int __init numa_emulation(unsigned long start_pfn,
if (num_nodes < 0)
return num_nodes;
- memnode_shift = compute_hash_shift(nodes, num_nodes, NULL);
+
+ for (i = 0; i < ARRAY_SIZE(nodeid); i++)
+ nodeid[i] = i;
+
+ memnode_shift = compute_hash_shift(nodes, num_nodes, nodeid);
if (memnode_shift < 0) {
memnode_shift = 0;
printk(KERN_ERR "No NUMA hash function found. NUMA emulation "
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