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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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