and remove mm_sbrk and kmm_sbrk since it's wrong to expose sbrk to other heaps except the default userspace heap. Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
and remove mm_sbrk and kmm_sbrk since it's wrong to expose sbrk to other heaps except the default userspace heap. Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>