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Subject[10/17] Use GFP_VFALLBACK for sparsemem.
Sparsemem currently attempts first to do a physically contiguous mapping
and then falls back to vmalloc. The same thing can now be accomplished
using GFP_VFALLBACK.

Signed-off-by: Christoph Lameter <clameter@sgi.com>

---
mm/sparse.c | 23 +++--------------------
1 file changed, 3 insertions(+), 20 deletions(-)
Index: linux-2.6/mm/sparse.c
===================================================================
--- linux-2.6.orig/mm/sparse.c 2007-09-18 13:21:44.000000000 -0700
+++ linux-2.6/mm/sparse.c 2007-09-18 13:28:43.000000000 -0700
@@ -269,32 +269,15 @@ void __init sparse_init(void)
#ifdef CONFIG_MEMORY_HOTPLUG
static struct page *__kmalloc_section_memmap(unsigned long nr_pages)
{
- struct page *page, *ret;
unsigned long memmap_size = sizeof(struct page) * nr_pages;

- page = alloc_pages(GFP_KERNEL|__GFP_NOWARN, get_order(memmap_size));
- if (page)
- goto got_map_page;
-
- ret = vmalloc(memmap_size);
- if (ret)
- goto got_map_ptr;
-
- return NULL;
-got_map_page:
- ret = (struct page *)pfn_to_kaddr(page_to_pfn(page));
-got_map_ptr:
- memset(ret, 0, memmap_size);
-
- return ret;
+ return (struct page *)alloc_page(GFP_VFALLBACK|__GFP_ZERO,
+ get_order(memmap_size));
}

static void __kfree_section_memmap(struct page *memmap, unsigned long nr_pages)
{
- if (is_vmalloc_addr(memmap))
- vfree(memmap);
- else
- free_pages((unsigned long)memmap,
+ free_pages((unsigned long)memmap,
get_order(sizeof(struct page) * nr_pages));
}

--
-
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