From: Dries Kimpe <Dries.Kimpe@XXXXXXXXXXXXXX>
Date: January 22, 2008 2:40:24 PM CST
To: mpi-21@XXXXXXXXXXXXX
Subject: [mpi-21] Proposal EH2 & MPI_INPLACE
Reply-To: mpi-21@XXXXXXXXXXXXX

There is a problem with adding const to the send buffer of some of the
collective operations:

Because of MPI_IN_PLACE, in some cases, the send buffer will not be
read-only but read-write.

Example:
MPI_Allreduce

Affected:
All collectives that support MPI_IN_PLACE --AND-- modify the data in the send
buffer.  

Solution:
Drop the const from the send buffer argument of the affected functions

  Dries