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    Subject[PATCH 12/35] x86, lmb: Add lmb_find_area_node()
    Date
    It can be used to find NODE_DATA for numa.

    Need to make sure early_node_map[] is filled before it is called, otherwise
    it will fallback to lmb_find_area(), with node range.

    Signed-off-by: Yinghai Lu <yinghai@kernel.org>
    ---
    arch/x86/include/asm/lmb.h | 1 +
    arch/x86/mm/lmb.c | 15 +++++++++++++++
    2 files changed, 16 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/include/asm/lmb.h b/arch/x86/include/asm/lmb.h
    index d0ae19f..358d8a6 100644
    --- a/arch/x86/include/asm/lmb.h
    +++ b/arch/x86/include/asm/lmb.h
    @@ -15,5 +15,6 @@ int get_free_all_memory_range(struct range **rangep, int nodeid);
    void lmb_register_active_regions(int nid, unsigned long start_pfn,
    unsigned long last_pfn);
    u64 lmb_hole_size(u64 start, u64 end);
    +u64 lmb_find_area_node(int nid, u64 start, u64 end, u64 size, u64 align);

    #endif
    diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
    index faa9ce6..c5fa1dd 100644
    --- a/arch/x86/mm/lmb.c
    +++ b/arch/x86/mm/lmb.c
    @@ -254,6 +254,21 @@ void __init lmb_free_area(u64 start, u64 end)
    }

    /*
    + * Need to call this function after lmb_register_active_regions,
    + * so early_node_map[] is filled already.
    + */
    +u64 __init lmb_find_area_node(int nid, u64 start, u64 end, u64 size, u64 align)
    +{
    + u64 addr;
    + addr = find_memory_core_early(nid, size, align, start, end);
    + if (addr != LMB_ERROR)
    + return addr;
    +
    + /* Fallback, should already have start end within node range */
    + return lmb_find_area(start, end, size, align);
    +}
    +
    +/*
    * Finds an active region in the address range from start_pfn to last_pfn and
    * returns its range in ei_startpfn and ei_endpfn for the lmb entry.
    */
    --
    1.6.4.2


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