d_off field in struct dirent and 32-on-64 emulation

[Florian Weimer]

* Mao Han:

> I'm still not clear what's the problem of using getdent64 on csky, seems
> getdent64 may fail when LFS is used. I haven't seen any our customer use
> LFS before, so no one will be affected by this issue at present?

Could you post “strace -v” output from something calling getdents64 on
an ext4 file system, please?

It may be that the problem does not exist because ext4 always uses
31-bit hashes for d_off on csky.

Thanks,
Florian