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    Subject[PATCH v2 repost 3/7] mm: add a function to get the max pfn
    Date
    Expose the function to get the max pfn, so it can be used in the
    virtio-balloon device driver.

    Signed-off-by: Liang Li <liang.z.li@intel.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Vlastimil Babka <vbabka@suse.cz>
    Cc: Mel Gorman <mgorman@techsingularity.net>
    Cc: Michael S. Tsirkin <mst@redhat.com>
    Cc: Paolo Bonzini <pbonzini@redhat.com>
    Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
    Cc: Amit Shah <amit.shah@redhat.com>
    ---
    mm/page_alloc.c | 6 ++++++
    1 file changed, 6 insertions(+)

    diff --git a/mm/page_alloc.c b/mm/page_alloc.c
    index 8b3e134..7da61ad 100644
    --- a/mm/page_alloc.c
    +++ b/mm/page_alloc.c
    @@ -4517,6 +4517,12 @@ void show_free_areas(unsigned int filter)
    show_swap_cache_info();
    }

    +unsigned long get_max_pfn(void)
    +{
    + return max_pfn;
    +}
    +EXPORT_SYMBOL(get_max_pfn);
    +
    static void zoneref_set_zone(struct zone *zone, struct zoneref *zoneref)
    {
    zoneref->zone = zone;
    --
    1.9.1
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