ARM: dts: at91: sama5d3: define clock rate range for tcb1

[sagit-ice-cold/kernel_xiaomi_msm8998.git] / kernel / cgroup_pids.c

diff --git a/kernel/cgroup_pids.c b/kernel/cgroup_pids.c
index b50d5a1..ea8cb03 100644 (file)
--- a/kernel/cgroup_pids.c
+++ b/kernel/cgroup_pids.c
@@ -48,7 +48,7 @@ struct pids_cgroup {
         * %PIDS_MAX = (%PID_MAX_LIMIT + 1).
         */
        atomic64_t                      counter;
-       int64_t                         limit;
+       atomic64_t                      limit;
 };
 
 static struct pids_cgroup *css_pids(struct cgroup_subsys_state *css)
@@ -70,8 +70,8 @@ pids_css_alloc(struct cgroup_subsys_state *parent)
        if (!pids)
                return ERR_PTR(-ENOMEM);
 
-       pids->limit = PIDS_MAX;
        atomic64_set(&pids->counter, 0);
+       atomic64_set(&pids->limit, PIDS_MAX);
        return &pids->css;
 }
 
@@ -142,13 +142,14 @@ static int pids_try_charge(struct pids_cgroup *pids, int num)
 
        for (p = pids; parent_pids(p); p = parent_pids(p)) {
                int64_t new = atomic64_add_return(num, &p->counter);
+               int64_t limit = atomic64_read(&p->limit);
 
                /*
                 * Since new is capped to the maximum number of pid_t, if
                 * p->limit is %PIDS_MAX then we know that this test will never
                 * fail.
                 */
-               if (new > p->limit)
+               if (new > limit)
                        goto revert;
        }
 
@@ -262,7 +263,7 @@ set_limit:
         * Limit updates don't need to be mutex'd, since it isn't
         * critical that any racing fork()s follow the new limit.
         */
-       pids->limit = limit;
+       atomic64_set(&pids->limit, limit);
        return nbytes;
 }
 
@@ -270,7 +271,7 @@ static int pids_max_show(struct seq_file *sf, void *v)
 {
        struct cgroup_subsys_state *css = seq_css(sf);
        struct pids_cgroup *pids = css_pids(css);
-       int64_t limit = pids->limit;
+       int64_t limit = atomic64_read(&pids->limit);
 
        if (limit >= PIDS_MAX)
                seq_printf(sf, "%s\n", PIDS_MAX_STR);