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authorTejun Heo <tj@kernel.org>2011-07-12 11:16:04 +0200
committerH. Peter Anvin <hpa@linux.intel.com>2011-07-14 11:47:51 -0700
commit474b881bf4ee86aba55d46a4fdf293de32cba91b (patch)
treebd197e7989ec4d76445a393679ca1f18727825b6 /arch/x86/mm/numa_emulation.c
parent6b5d41a1b97f5529284f16170211b87fd60264c0 (diff)
x86: Use absent_pages_in_range() instead of memblock_x86_hole_size()
memblock_x86_hole_size() calculates the total size of holes in a given range according to memblock and is used by numa emulation code and numa_meminfo_cover_memory(). Since conversion to MEMBLOCK_NODE_MAP, absent_pages_in_range() also uses memblock and gives the same result. This patch replaces memblock_x86_hole_size() uses with absent_pages_in_range(). After the conversion the x86 function doesn't have any user left and is killed. Signed-off-by: Tejun Heo <tj@kernel.org> Link: http://lkml.kernel.org/r/1310462166-31469-12-git-send-email-tj@kernel.org Cc: Yinghai Lu <yinghai@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/mm/numa_emulation.c')
-rw-r--r--arch/x86/mm/numa_emulation.c30
1 files changed, 18 insertions, 12 deletions
diff --git a/arch/x86/mm/numa_emulation.c b/arch/x86/mm/numa_emulation.c
index e3d471c20cd..971fe70549b 100644
--- a/arch/x86/mm/numa_emulation.c
+++ b/arch/x86/mm/numa_emulation.c
@@ -28,6 +28,16 @@ static int __init emu_find_memblk_by_nid(int nid, const struct numa_meminfo *mi)
return -ENOENT;
}
+static u64 mem_hole_size(u64 start, u64 end)
+{
+ unsigned long start_pfn = PFN_UP(start);
+ unsigned long end_pfn = PFN_DOWN(end);
+
+ if (start_pfn < end_pfn)
+ return PFN_PHYS(absent_pages_in_range(start_pfn, end_pfn));
+ return 0;
+}
+
/*
* Sets up nid to range from @start to @end. The return value is -errno if
* something went wrong, 0 otherwise.
@@ -89,7 +99,7 @@ static int __init split_nodes_interleave(struct numa_meminfo *ei,
* Calculate target node size. x86_32 freaks on __udivdi3() so do
* the division in ulong number of pages and convert back.
*/
- size = max_addr - addr - memblock_x86_hole_size(addr, max_addr);
+ size = max_addr - addr - mem_hole_size(addr, max_addr);
size = PFN_PHYS((unsigned long)(size >> PAGE_SHIFT) / nr_nodes);
/*
@@ -135,8 +145,7 @@ static int __init split_nodes_interleave(struct numa_meminfo *ei,
* Continue to add memory to this fake node if its
* non-reserved memory is less than the per-node size.
*/
- while (end - start -
- memblock_x86_hole_size(start, end) < size) {
+ while (end - start - mem_hole_size(start, end) < size) {
end += FAKE_NODE_MIN_SIZE;
if (end > limit) {
end = limit;
@@ -150,7 +159,7 @@ static int __init split_nodes_interleave(struct numa_meminfo *ei,
* this one must extend to the boundary.
*/
if (end < dma32_end && dma32_end - end -
- memblock_x86_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE)
+ mem_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE)
end = dma32_end;
/*
@@ -158,8 +167,7 @@ static int __init split_nodes_interleave(struct numa_meminfo *ei,
* next node, this one must extend to the end of the
* physical node.
*/
- if (limit - end -
- memblock_x86_hole_size(end, limit) < size)
+ if (limit - end - mem_hole_size(end, limit) < size)
end = limit;
ret = emu_setup_memblk(ei, pi, nid++ % nr_nodes,
@@ -180,7 +188,7 @@ static u64 __init find_end_of_node(u64 start, u64 max_addr, u64 size)
{
u64 end = start + size;
- while (end - start - memblock_x86_hole_size(start, end) < size) {
+ while (end - start - mem_hole_size(start, end) < size) {
end += FAKE_NODE_MIN_SIZE;
if (end > max_addr) {
end = max_addr;
@@ -211,8 +219,7 @@ static int __init split_nodes_size_interleave(struct numa_meminfo *ei,
* creates a uniform distribution of node sizes across the entire
* machine (but not necessarily over physical nodes).
*/
- min_size = (max_addr - addr - memblock_x86_hole_size(addr, max_addr)) /
- MAX_NUMNODES;
+ min_size = (max_addr - addr - mem_hole_size(addr, max_addr)) / MAX_NUMNODES;
min_size = max(min_size, FAKE_NODE_MIN_SIZE);
if ((min_size & FAKE_NODE_MIN_HASH_MASK) < min_size)
min_size = (min_size + FAKE_NODE_MIN_SIZE) &
@@ -252,7 +259,7 @@ static int __init split_nodes_size_interleave(struct numa_meminfo *ei,
* this one must extend to the boundary.
*/
if (end < dma32_end && dma32_end - end -
- memblock_x86_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE)
+ mem_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE)
end = dma32_end;
/*
@@ -260,8 +267,7 @@ static int __init split_nodes_size_interleave(struct numa_meminfo *ei,
* next node, this one must extend to the end of the
* physical node.
*/
- if (limit - end -
- memblock_x86_hole_size(end, limit) < size)
+ if (limit - end - mem_hole_size(end, limit) < size)
end = limit;
ret = emu_setup_memblk(ei, pi, nid++ % MAX_NUMNODES,