Not working on a kernel built before 2020

[summerwant]

The code use __kernel_old_time_t and __kernel_old_timespec which were introduced in Linux Kernel 5.6.

If you have the same issue, replace:

find . -type f -exec sed -i 's/\b__kernel_old_time_t\b/time_t/g' {} +
find . -type f -exec sed -i 's/\b__kernel_old_timespec\b/timespec/g' {} +