K 10 svn:author V 3 alc K 8 svn:date V 27 2004-03-16T19:04:28.000000Z K 7 svn:log V 539 Refactor the existing machine-dependent sf_buf_free() into a machine- dependent function by the same name and a machine-independent function, sf_buf_mext(). Aside from the virtue of making more of the code machine- independent, this change also makes the interface more logical. Before, sf_buf_free() did more than simply undo an sf_buf_alloc(); it also unwired and if necessary freed the page. That is now the purpose of sf_buf_mext(). Thus, sf_buf_alloc() and sf_buf_free() can now be used as a general-purpose emphemeral map cache. END