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On a Netgear R7800, if ospf v2 or v3 is configured in bird.conf, it fails to start with this error: Fri Jun 11 14:41:11 2021 daemon.info bird: Started Fri Jun 11 14:41:11 2021 kern.err kernel: [ 3500.853248] Alignment trap: not handling instruction f44c0a1f at [<00035848>] Fri Jun 11 14:41:11 2021 kern.alert kernel: [ 3500.853283] 8<--- cut here --- Fri Jun 11 14:41:11 2021 kern.alert kernel: [ 3500.859363] Unhandled fault: alignment exception (0x801) at 0x007e0624 Fri Jun 11 14:41:11 2021 kern.alert kernel: [ 3500.862443] pgd = 0bbef4fd Fri Jun 11 14:41:11 2021 kern.alert kernel: [ 3500.868821] [007e0624] *pgd=5d6ca835, *pte=5c40b75f, *ppte=5c40bc7f The problem is due to a struct not being properly aligned on the ARMv7 architecture. This patch fixes the problem by adding the "PACKED" macro to the affected struct. Note that upstream may later fix this in another way, in which case this patch will not be required. Signed-off-by: Matt Reeve <matt@mreeve.com> (cherry picked from commit 166b6ea77b30f82eb880ce43a9e9ff343b79fe2e)