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    Subject[PATCH 1/3] memcg: mark init_section_page_cgroup() properly
    Date
    The commit ca371c0d7e23 ("memcg: fix page_cgroup fatal error
    in FLATMEM") removes call to alloc_bootmem() in the function
    so that it can be marked as __meminit to reduce memory usage
    when MEMORY_HOTPLUG=n.

    Signed-off-by: Namhyung Kim <namhyung@gmail.com>
    Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    ---
    mm/page_cgroup.c | 3 +--
    1 files changed, 1 insertions(+), 2 deletions(-)

    diff --git a/mm/page_cgroup.c b/mm/page_cgroup.c
    index 5bffada7cde1..2d1a0fa01d7b 100644
    --- a/mm/page_cgroup.c
    +++ b/mm/page_cgroup.c
    @@ -105,8 +105,7 @@ struct page_cgroup *lookup_page_cgroup(struct page *page)
    return section->page_cgroup + pfn;
    }

    -/* __alloc_bootmem...() is protected by !slab_available() */
    -static int __init_refok init_section_page_cgroup(unsigned long pfn)
    +static int __meminit init_section_page_cgroup(unsigned long pfn)
    {
    struct mem_section *section = __pfn_to_section(pfn);
    struct page_cgroup *base, *pc;
    --
    1.7.4


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