diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/cpuset.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c index cf8203a5fa7..fc949e4a625 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -603,9 +603,7 @@ static void guarantee_online_mems(const struct cpuset *cs, nodemask_t *pmask) * Do not call this routine if in_interrupt(). * * Call without callback_sem or task_lock() held. May be called - * with or without manage_sem held. Except in early boot or - * an exiting task, when tsk->cpuset is NULL, this routine will - * acquire task_lock(). We don't need to use task_lock to guard + * with or without manage_sem held. Doesn't need task_lock to guard * against another task changing a non-NULL cpuset pointer to NULL, * as that is only done by a task on itself, and if the current task * is here, it is not simultaneously in the exit code NULL'ing its @@ -631,9 +629,6 @@ void cpuset_update_task_memory_state() struct task_struct *tsk = current; struct cpuset *cs = tsk->cpuset; - if (unlikely(!cs)) - return; - task_lock(tsk); my_cpusets_mem_gen = cs->mems_generation; task_unlock(tsk); @@ -1836,6 +1831,21 @@ static int cpuset_rmdir(struct inode *unused_dir, struct dentry *dentry) return 0; } +/* + * cpuset_init_early - just enough so that the calls to + * cpuset_update_task_memory_state() in early init code + * are harmless. + */ + +int __init cpuset_init_early(void) +{ + struct task_struct *tsk = current; + + tsk->cpuset = &top_cpuset; + tsk->cpuset->mems_generation = atomic_read(&cpuset_mems_generation); + return 0; +} + /** * cpuset_init - initialize cpusets at system boot * |