Linux commit v5.16-11573-g6dfbbae14a7b
introduce pde_data() and
Linux commit v5.16-11574-g359745d78351
remove PDE_DATA()

Use PDE_DATA() when pde_data is not available.

Linux commit v5.17-rc3-1-gf68f2ff91512
fortify: Detect struct member overflows in memcpy() at compile-time

memcpy and memset of collections of struct members
will trigger:

error: call to ‘__write_overflow_field’ declared with attribute
warning: detected write beyond size of field (1st parameter);
maybe use struct_group()?
[-Werror] __write_overflow_field(p_size_field, size);