[petsc-dev] KSPSolve(ksp,PETSC_NULL,PETSC_NULL) is ok

[Barry Smith]

    I realize I let you guys bulldoze me into checking that x and b exist in 
the call to KSPSolve(). 

    But they don't need to exist so I am attempting to undue the damage someone 
did by requiring them.


    Barry

  If KSPSetDM() was used then it is acceptable for the x and b arguments to 
KSPSolve to not exist.