FlexLinearAttention: Compiling a Unified Abstraction into Scalable Kernels for Linear Attention - Duanmu, Haojie; Zheng, Size; Zheng, Ningxin; Lu, Jianqiao; Zheng, Xuegui; Zhang, Xingcheng; Chang, Li-Wen; Liu, Xin; Lin, Dahua (International Conference on Learning Representations, 2026)