Khronos has today released the SYCL 2020 Revision 7 maintenance update with the following updates:

• clarify buffer creation with nullptr;
• align more “concurrent” wording with ISO C++;
• precise that work-items provide weakly parallel forward progress guarantee;
• import forward progress definition from ISO C++ and clarify various aspects on atomicity and synchronization;
• C++17 remplaced by just the C++ core language;
• fix description of max_work_item_sizes and clarify relationship to kernel dimensionality;
• clarify “group” meaning in algorithm descriptions;
• improve readability of group barrier description;
• mention kernel_handler in kernel function definition;
• relax requirement on backend traits being available;
• clarify the “reducer” member types and constants;
• clarify native_specialization_constant when empty;
• allow “empty” shared_ptr for buffer construction;
• add static constexpr `dimensions` member to all range/id-like types;
• clarify blocking behavior of `queue::submit;
• clarifications to device copyable;
• clarify USM allocation of zero size coherent with std::malloc;
• clarify sycl::atomic_ref;
• clarify queue profiling behavior when unsupported;
• clarify the wording for the use of property::queue::in_order;
• reword guarantee about host-to-device fence synchronization;
• add single source single compiler pass (SSCP) to the glossary;
• add half to sycl::plus and sycl::multiplies and fix trait use;
• clarify any_device_has / all_devices_have;
• clarify that objects in global, local, or private address space can also be accessed via the generic address space;
• disallow ++ and—for sycl::vec;
• no assignment for read-only accessors;
• clarifications to sub-group;
• clarify is_group and bool_constant alias relations;
• clarify out-of-bounds behavior for group_broadcast.