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    Subject[PATCH 1/5] mm, devm_memremap_pages: mark devm_memremap_pages() EXPORT_SYMBOL_GPL
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    The devm_memremap_pages() facility is tightly integrated with the
    kernel's memory hotplug functionality. It injects an altmap argument
    deep into the architecture specific vmemmap implementation to allow
    allocating from specific reserved pages, and it has Linux specific
    assumptions about page structure reference counting relative to
    get_user_pages() and get_user_pages_fast(). It was an oversight that
    this was not marked EXPORT_SYMBOL_GPL from the outset.

    Cc: Michal Hocko <mhocko@suse.com>
    Cc: "Jérôme Glisse" <jglisse@redhat.com>
    Reviewed-by: Christoph Hellwig <hch@lst.de>
    Signed-off-by: Dan Williams <dan.j.williams@intel.com>
    ---
    kernel/memremap.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/kernel/memremap.c b/kernel/memremap.c
    index 895e6b76b25e..c614645227a7 100644
    --- a/kernel/memremap.c
    +++ b/kernel/memremap.c
    @@ -429,7 +429,7 @@ void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap)
    pgmap_radix_release(res, pgoff);
    return ERR_PTR(error);
    }
    -EXPORT_SYMBOL(devm_memremap_pages);
    +EXPORT_SYMBOL_GPL(devm_memremap_pages);

    unsigned long vmem_altmap_offset(struct vmem_altmap *altmap)
    {
    \
     
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