Hi David, Does it make sense to build this sample when cross compiling? The reason I ask is that it has been breaking the linux-next build of allmodconfig for a while now, with: HOSTCC samples/kdbus/kdbus-workers samples/kdbus/kdbus-workers.c: In function ‘prime_new’: samples/kdbus/kdbus-workers.c:934:18: error: ‘__NR_memfd_create’ undeclared (first use in this function) p->fd = syscall(__NR_memfd_create, "prime-area", MFD_CLOEXEC); ^ samples/kdbus/kdbus-workers.c:934:18: note: each undeclared identifier is reported only once for each function it appears in scripts/Makefile.host:91: recipe for target 'samples/kdbus/kdbus-workers' failed make[2]: *** [samples/kdbus/kdbus-workers] Error 1 http://kisskb.ellerman.id.au/kisskb/buildresult/12473453/ We recently made some changes to skip other sample/test programs when cross compiling in mainline 65f6f092a6987 and f59514b6a8c5ca6dd and 6a407a81a9abcf. Maybe it makes sense to do the same here? Paul.