Compilation issue with 5.12 kernels

[pmaliset-xlnx]

ktf/kernel/ktf_cov.c:188:16: error: ‘module_mutex’ undeclared (first use in this function); did you mean ‘module_put’?
188 | mutex_unlock(&module_mutex);
| ^~~~~~~~~~~~
| module_put
ktf/kernel/ktf_cov.c:568:15: error: ‘module_mutex’ undeclared (first use in this function); did you mean ‘module_put’?
568 | mutex_lock(&module_mutex);
| ^~~~~~~~~~~~
| module_put