CONFIG_SHMEM=n & CONFIG_TMPFS=n , tmpfs 多提供了 ▼ macros -shmem_acct_size -shmem_file_operations -shmem_get_inode -shmem_unacct_size -shmem_vm_ops ▼ variables -shmem_fs_type shmem_truncate_range ▼ functions shmem_get_unmapped_area(struct file *file, unsigned long addr, unsigned long...