On Wed, Dec 07, 2022, Oliver Upton wrote: > MEM_REGION_TEST_DATA is meant to hold data explicitly used by a > selftest, not implicit allocations due to the selftests infrastructure. > Allocate the ucall pool from MEM_REGION_DATA much like the rest of the > selftests library allocations. > > Fixes: 426729b2cf2e ("KVM: selftests: Add ucall pool based implementation") Not that it really matters because no one will backport this verbatim, but this is the wrong commit to blame. As of commit 426729b2cf2e, MEM_REGION_DATA does not exist. And similarly, the common ucall code didn't exist when Ricardo's series introduced MEM_REGION_DATA. $ git show 426729b2cf2e:tools/testing/selftests/kvm/include/kvm_util_base.h | grep MEM_REGION_DATA $ git show 290c5b54012b7:tools/testing/selftests/kvm/lib/ucall_common.c fatal: path 'tools/testing/selftests/kvm/lib/ucall_common.c' exists on disk, but not in '290c5b54012b7' The commit where the two collided is: Fixes: cc7544101eec ("Merge tag 'kvmarm-6.2' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD") > Signed-off-by: Oliver Upton <oliver.upton@xxxxxxxxx> > --- Fixes nit aside, Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>