apparmor: Fix warning: 'decompress_zstd' defined but not used

decompress_zstd() is used in two cases:

- CONFIG SECURITY_APPARMOR_COMPRESSED_POLICY: which allows for
  compressed policy to be loaded
- CONFIG_SECURITY_APPARMOR_EXPORT_BINARY: which allows introspecting
  loaded policy, that is stored in compressed form until it is needed.

When neither of these are selected there is no need for decpress_zstd(),
which results in the decompressed_zstd defined but not used message.
Only define decmpress_zstd() if either of those config options are
enabled. The stub routine is not needed because all calling code is
gated by one of those config options.

Fixes: 1c5f27e845e84 ("apparmor: Fix build failure when ZSTD_DECOMPRESS is not enabled")
Signed-off-by: John Johansen <john.johansen@canonical.com>

0 files changed, 0 insertions, 0 deletions