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[PATCH] Keys: Remove key duplication

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Remove the key duplication stuff since there's nothing that uses it, no way
to get at it and it's awkward to deal with for LSM purposes.

Signed-off-by: David Howells <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
David Howells 2006-01-06 00:11:24 -08:00 • committed by Linus Torvalds
commit 8d9067bda9
6 changed files with 3 additions and 177 deletions
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18
Documentation/keys.txt
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@ -860,24 +860,6 @@ The structure has a number of fields, some of which are mandatory:
It is safe to sleep in this method.
(*) int (*duplicate)(struct key *key, const struct key *source);
If this type of key can be duplicated, then this method should be
provided. It is called to copy the payload attached to the source into the
new key. The data length on the new key will have been updated and the
quota adjusted already.
This method will be called with the source key's semaphore read-locked to
prevent its payload from being changed, thus RCU constraints need not be
applied to the source key.
This method does not have to lock the destination key in order to attach a
payload. The fact that KEY_FLAG_INSTANTIATED is not set in key->flags
prevents anything else from gaining access to the key.
It is safe to sleep in this method.
(*) int (*update)(struct key *key, const void *data, size_t datalen);
If this type of key can be updated, then this method should be provided.