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.

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/kern/uipc_cow.c b/sys/kern/uipc_cow.c
index ca6b2d88c6a4..8c00ffe1df97 100644
--- a/sys/kern/uipc_cow.c
+++ b/sys/kern/uipc_cow.c
@@ -85,7 +85,7 @@ socow_iodone(void *addr, void *args)
 	vm_page_unlock_queues();
 	splx(s);
 	/* note that sf_buf_free() unwires the page for us*/
-	sf_buf_free(addr, args);
+	sf_buf_mext(addr, args);
 	socow_stats.iodone++;
 }