https://uberchromegw.corp.google.com/i/chromeos/builders/strago-paladin/builds/3444/steps/BuildPackages/logs/stdio

chromeos-kernel-3_18-3.18-r1156: /mnt/host/source/src/third_party/kernel/v3.18/drivers/net/wireless/iwl7000/iwlwifi/mvm/fw.c: In function 'iwl_mvm_up':
chromeos-kernel-3_18-3.18-r1156: /mnt/host/source/src/third_party/kernel/v3.18/drivers/net/wireless/iwl7000/iwlwifi/mvm/fw.c:1090:6: error: 'struct iwl_mvm' has no member named 'scan_type'
chromeos-kernel-3_18-3.18-r1156:    mvm->scan_type = IWL_SCAN_TYPE_NOT_SET;
chromeos-kernel-3_18-3.18-r1156:       ^
chromeos-kernel-3_18-3.18-r1156: /mnt/host/source/src/third_party/kernel/v3.18/scripts/Makefile.build:257: recipe for target 'drivers/net/wireless/iwl7000/iwlwifi/mvm/fw.o' failed

and indeed, while commit 997e44adc3d5986cfbf892b6286059ab0aa66269 added this line:
+       mvm->scan_type = IWL_SCAN_TYPE_NOT_SET;

the iwlwifi/mvm/mvm.h header itself still does not declare any scan_type member in the struct iwl_mvm.

this is breaking updates to the 3.18 repo.  going to assume this was brought in by a recent repo merge.