staging/lustre/llog: remove unused server code
Most of the code in llog.c and llog_cat.c is completely unused
on the client and can be removed, as a preparation for removing
the dt_object code.
Two tricky parts are:
- In llog_cat_close(), we rely on the fact that llh_flags never
contains LLOG_F_ZAP_WHEN_EMPTY, because nobody ever sets that
flag.
- In llog_read_header(), we check the return value of the lpi_cb
callback, and again we know that it cannot be LLOG_PROC_BREAK
or LLOG_DEL_RECORD and can remove the respective code path.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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