MFC: >  devfs is not yet fully MPSAFE - for example, multiple concurrent devfs(8) >  processes can cause a panic when operating on rulesets.
MFC:
>  devfs is not yet fully MPSAFE - for example, multiple concurrent devfs(8)
>  processes can cause a panic when operating on rulesets.

Approved by:	re (scottl)

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase