Changelog:
=========
* sar/sadf: Make sure that datafiles with unknown activities can
be read by sar and sadf.
* sar/sadf: Don't reallocate buffers for activities not present
in file.
* sar: Make sure that all buffers are copied in copy_structures()
function.
(From OE-Core rev: 7ec2ed62ea64e5a3652b436e7772216159ae4466)
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>