[$] Representing the true signatures of kernel functions

Optimizing compilers can, under some circumstances, infer when a parameter to afunction is not needed, and remove it. This is all well and good until thekernel's tracing or BPF subsystems need information on how to call the functionor where its arguments are stored.Alan Maguire and Yonghong Song spoke at the 2026LinuxStorage, Filesystem, Memory-Management, and BPF Summit about their work onrecording information regarding changed function signatures in the kernel's BTF debugginginformation, to better support tracing such functions.