gcs_size
u64 gcs_size;
current->thread.gcs_size = 0;
p->thread.gcs_size = 0;
u32 gcs_size;
if (user->gcs_size != sizeof(*user->gcs))
user->gcs_size = size;
vm_munmap(task->thread.gcs_base, task->thread.gcs_size);
task->thread.gcs_size = 0;
size = gcs_size(0);
task->thread.gcs_size = size;
size = gcs_size(size);
tsk->thread.gcs_size = size;