Spinal: A near-instant, predictive surface for any codebase

• 97d65b5 KVM: Check for duplicate vcpu_id as early as possible Reverted 56d +9 −1 10w Reverted 56 days later by 700f8d2.
• 51943a1 mm: provide vma_[flags_]is_cow_mapping() and remove is_cow_mapping() Wide 7 modules +107 −38 6w Wide: arch, drivers, fs, include, kernel, mm, tools.
• 1221246 selftests: net: cover UDP splice checksum fragment alignment Large 380 lines +380 −0 7d 380 hand-written changed lines.