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    Subject[PATCH 5.19 1113/1157] hugetlb_cgroup: fix wrong hugetlb cgroup numa stat
    Date
    From: Miaohe Lin <linmiaohe@huawei.com>

    [ Upstream commit 2727cfe4072a35ce813e3708f74c135de7da8897 ]

    We forget to set cft->private for numa stat file. As a result, numa stat
    of hstates[0] is always showed for all hstates. Encode the hstates index
    into cft->private to fix this issue.

    Link: https://lkml.kernel.org/r/20220723073804.53035-1-linmiaohe@huawei.com
    Fixes: f47761999052 ("hugetlb: add hugetlb.*.numa_stat file")
    Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
    Acked-by: Muchun Song <songmuchun@bytedance.com>
    Cc: Kees Cook <keescook@chromium.org>
    Cc: Mike Kravetz <mike.kravetz@oracle.com>
    Cc: Mina Almasry <almasrymina@google.com>
    Cc: Shakeel Butt <shakeelb@google.com>
    Cc: <stable@vger.kernel.org>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    mm/hugetlb_cgroup.c | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c
    index f9942841df18..c86691c431fd 100644
    --- a/mm/hugetlb_cgroup.c
    +++ b/mm/hugetlb_cgroup.c
    @@ -772,6 +772,7 @@ static void __init __hugetlb_cgroup_file_dfl_init(int idx)
    /* Add the numa stat file */
    cft = &h->cgroup_files_dfl[6];
    snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf);
    + cft->private = MEMFILE_PRIVATE(idx, 0);
    cft->seq_show = hugetlb_cgroup_read_numa_stat;
    cft->flags = CFTYPE_NOT_ON_ROOT;

    --
    2.35.1


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