cache: rwlock accesses to cache operations
cache: rwlock accesses to cache operations

Puts an rwlock around 'cache_ops'.

Signed-off-by: Thomas Graf <17c2d8920621522552b392f72d8fdb4d1e866b44@suug.ch>

karlhiramoto/libnl,chitranshi/libnl,karlhiramoto/libnl,kolyshkin/libnl,honsys/libnl,tgraf/libnl,Distrotech/libnl,UnicronNL/libnl3,baloo/libnl,teto/libnl_old,HolyShitMan/libnl-1,thom311/libnl,teto/libnl_old,vyos/libnl3,mshirley/libnl,UnicronNL/libnl3,tklauser/libnl,vyos/libnl3,houstar/libnl,kolyshkin/libnl,cyclops8456/libnl3,thom311/libnl,tgraf/libnl,claudelee/libnl,honsys/libnl,congwang/libnl,kolyshkin/libnl,HolyShitMan/libnl-1,dsahern/libnl,tklauser/libnl,dsahern/libnl,kolyshkin/libnl,thom311/libnl,claudelee/libnl,baloo/libnl,greearb/libnl-ct,dsahern/libnl,greearb/libnl-ct,baloo/libnl,cfriedt/libnl,Distrotech/libnl,houstar/libnl,tklauser/libnl,mshirley/libnl,cyclops8456/libnl3,UnicronNL/libnl3,baloo/libnl,cfriedt/libnl,HolyShitMan/libnl-1,chitranshi/libnl,tgraf/libnl,chitranshi/libnl,karlhiramoto/libnl,claudelee/libnl,HolyShitMan/libnl-1,vyos/libnl3,congwang/libnl,greearb/libnl-ct,vyos/libnl3,teto/libnl_old,UnicronNL/libnl3,tklauser/libnl,chitranshi/libnl,congwang/libnl,claudelee/libnl,tgraf/libnl,houstar/libnl,cfriedt/libnl,dsahern/libnl,Distrotech/libnl,mshirley/libnl,mshirley/libnl,cyclops8456/libnl3,cfriedt/libnl,teto/libnl_old,Distrotech/libnl,honsys/libnl,cyclops8456/libnl3,congwang/libnl,houstar/libnl,karlhiramoto/libnl,honsys/libnl