Daniel Rosenberg [off-list ref] writes:

This adds a case insensitive hash function to allow taking the hash
without needing to allocate a casefolded copy of the string.

The existing d_hash implementations for casefolding allocates memory
within rcu-walk, by avoiding it we can be more efficient and avoid
worrying about a failed allocation.

Signed-off-by: Daniel Rosenberg <redacted>

Reviewed-by: Gabriel Krisman Bertazi <redacted>

-- 
Gabriel Krisman Bertazi