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    Subject[PATCH 1/2] cgroup: rstat: explicitly put loop variant in while
    Date
    Instead of do while unconditionally, let's put the loop variant in
    while.

    Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
    ---
    kernel/cgroup/rstat.c | 4 +---
    1 file changed, 1 insertion(+), 3 deletions(-)

    diff --git a/kernel/cgroup/rstat.c b/kernel/cgroup/rstat.c
    index 1486768f2318..a9d344e0521d 100644
    --- a/kernel/cgroup/rstat.c
    +++ b/kernel/cgroup/rstat.c
    @@ -124,12 +124,10 @@ static struct cgroup *cgroup_rstat_cpu_pop_updated(struct cgroup *pos,

    prstatc = cgroup_rstat_cpu(parent, cpu);
    nextp = &prstatc->updated_children;
    - while (true) {
    + while (*nextp != pos) {
    struct cgroup_rstat_cpu *nrstatc;

    nrstatc = cgroup_rstat_cpu(*nextp, cpu);
    - if (*nextp == pos)
    - break;
    WARN_ON_ONCE(*nextp == parent);
    nextp = &nrstatc->updated_next;
    }
    --
    2.33.1
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