kernel/extable.c: mark core_kernel_text notrace

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / kernel / cpuset.c

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 6948e9476b4242a95e86981d182e3d1928b68c11..067750bbdad8c753020ccb7afcbe60a43a84d729 100644 (file)
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -984,8 +984,10 @@ static void cpuset_change_task_nodemask(struct task_struct *tsk,
        need_loop = task_has_mempolicy(tsk) ||
                        !nodes_intersects(*newmems, tsk->mems_allowed);
 
-       if (need_loop)
+       if (need_loop) {
+               local_irq_disable();
                write_seqcount_begin(&tsk->mems_allowed_seq);
+       }
 
        nodes_or(tsk->mems_allowed, tsk->mems_allowed, *newmems);
        mpol_rebind_task(tsk, newmems, MPOL_REBIND_STEP1);
@@ -993,8 +995,10 @@ static void cpuset_change_task_nodemask(struct task_struct *tsk,
        mpol_rebind_task(tsk, newmems, MPOL_REBIND_STEP2);
        tsk->mems_allowed = *newmems;
 
-       if (need_loop)
+       if (need_loop) {
                write_seqcount_end(&tsk->mems_allowed_seq);
+               local_irq_enable();
+       }
 
        task_unlock(tsk);
 }
@@ -1149,7 +1153,13 @@ done:
 
 int current_cpuset_is_being_rebound(void)
 {
-       return task_cs(current) == cpuset_being_rebound;
+       int ret;
+
+       rcu_read_lock();
+       ret = task_cs(current) == cpuset_being_rebound;
+       rcu_read_unlock();
+
+       return ret;
 }
 
 static int update_relax_domain_level(struct cpuset *cs, s64 val)
@@ -2418,9 +2428,9 @@ int __cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
 
        task_lock(current);
        cs = nearest_hardwall_ancestor(task_cs(current));
+       allowed = node_isset(node, cs->mems_allowed);
        task_unlock(current);
 
-       allowed = node_isset(node, cs->mems_allowed);
        mutex_unlock(&callback_mutex);
        return allowed;
 }