Pull the tier-2 card and change the sparc64 ZFS loader to no longer probe

all diskN aliases for providers (which more or less corresponds to how the
x86 version behaves) but instead probe only those listed in the boot-device
OFW environment variable. This has the following advantages:
- avoids otherwise unavoidable OFW warnings about failures to open disks
  for which aliases exist but no actual hardware is connected
- avoids issues due to different diskN naming schemes
- aligns us with Solaris

MFC after:	3 days

1 files changed, 5 insertions, 0 deletions

diff --git a/UPDATING b/UPDATING
index cf580e8..fc00ae0 100644
--- a/UPDATING
+++ b/UPDATING
@@ -24,6 +24,11 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 10.x IS SLOW:
 	disable the most expensive debugging functionality run
 	"ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20120727:
+	The sparc64 ZFS loader has been changed to no longer try to auto-
+	detect ZFS providers based on diskN aliases but now requires these
+	to be explicitly listed in the OFW boot-device environment variable. 
+
 20120712:
 	The OpenSSL has been upgraded to 1.0.1c.  Any binaries requiring
 	libcrypto.so.6 or libssl.so.6 must be recompiled.  Also, there are