libostree unconditionally uses loop_config since bump to version 2023.5 in commitc64a3e9767andd7f24100c9which is only available with kernel >= 5.8 and3448914e8cresulting in the following build failure: composefs/libcomposefs/lcfs-mount.c: In function 'setup_loopback': composefs/libcomposefs/lcfs-mount.c:273:16: error: variable 'loopconfig' has initializer but incomplete type 273 | struct loop_config loopconfig = { 0 }; | ^~~~~~~~~~~ Fixes: - http://autobuild.buildroot.org/results/25d9d4f256861628ddd8e8ce659a39655d27b457 - http://autobuild.buildroot.org/results/5c7e1e47c6eb43f7832ef7820ec2b5ac0f3c3696 Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>