6da432fd54
It is possible that we will be running with an upgraded libseccomp, in which case libseccomp might know the syscall name, even if the number is not known at the time when systemd is being compiled. The guard only serves to break such upgrades, by requiring that we also recompile systemd. For s390-specific syscalls, use a define to exclude them, so that that we don't try to filter them on other arches. (cherry picked from commit 6cf852e79eb0eced2f77653941f9c75c3bd79386)
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