This pair of patches is long overdue being posted upstream. For several years now, XenServer has shipped the 2nd patch as a safety check (seeing as we have both livepatching and introspection), implemented with some return address manipulation to turn a void load hook into one which can return -EBUSY.
Andrew Cooper (2): xen/livepatch: Add a return value to load hooks x86/livepatch: Prevent patching with active waitqueues xen/arch/arm/livepatch.c | 5 +++++ xen/arch/x86/livepatch.c | 39 ++++++++++++++++++++++++++++++++++++ xen/common/livepatch.c | 37 ++++++++++++++++++++++++---------- xen/include/xen/livepatch.h | 1 + xen/include/xen/livepatch_payload.h | 2 +- xen/test/livepatch/xen_hello_world.c | 12 ++++++++--- 6 files changed, 81 insertions(+), 15 deletions(-) -- 2.11.0 _______________________________________________ Xen-devel mailing list [email protected] https://lists.xenproject.org/mailman/listinfo/xen-devel
