ppp: cleanup nm-ppp-manager-call to use const pointer and atomic operations

Thomas Haller requested to merge th/ppp-call-atomic into main
  • Mark NMPPPOps variable as const. It really must not be modified.

  • We cache the loaded symbols in a global variable. While this code is not used in a multi threaded situation, I think we should not add code that uses global variables that is not thread safe.

Merge request reports