You asked (paraphrased)
> Why is fs-private info is kept in the union of VFS inode instead of
> keeping an opaque void *ptr set by specific filesystems.
I don't know the answer to your question, however, exactly identical
situation is with the super_block, i.e. fs-private super_block info is
kept in the union of struct super_block instead of just a generic void
*ptr that could be initialized when the filesystem is mounted by
read_super.
Whoever answers your question - can you please also unaswer mine?
Thank you,
------
Tigran A. Aivazian | http://www.sco.com
Escalations Research Group | tel: +44-(0)1923-813796
Santa Cruz Operation Ltd | http://www.ocston.org/~tigran
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