[PATCH] nfsd kconfig: select things at the closest tristate instead of bool

I noticed recently that my CONFIG_CRYPTO_MD5 turned into a y again instead
of m.  It turns out that CONFIG_NFSD_V4 is selecting it to be y even though
I've chosen to compile nfsd as a module.

In general when we have a bool sitting under a tristate it is better to
select things you need from the tristate rather than the bool since that
allows the things you select to be modules.

The following patch does it for nfsd.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/Kconfig

@@ -1490,7 +1490,12 @@ config NFSD
 	select LOCKD
 	select SUNRPC
 	select EXPORTFS
-	select NFS_ACL_SUPPORT if NFSD_V3_ACL || NFSD_V2_ACL
+	select NFSD_V2_ACL if NFSD_V3_ACL
+	select NFS_ACL_SUPPORT if NFSD_V2_ACL
+	select NFSD_TCP if NFSD_V4
+	select CRYPTO_MD5 if NFSD_V4
+	select CRYPTO if NFSD_V4
+	select FS_POSIX_ACL if NFSD_V4
 	help
 	  If you want your Linux box to act as an NFS *server*, so that other
 	  computers on your local network which support NFS can access certain
@@ -1528,7 +1533,6 @@ config NFSD_V3
 config NFSD_V3_ACL
 	bool "Provide server support for the NFSv3 ACL protocol extension"
 	depends on NFSD_V3
-	select NFSD_V2_ACL
 	help
 	  Implement the NFSv3 ACL protocol extension for manipulating POSIX
 	  Access Control Lists on exported file systems. NFS clients should
@@ -1538,10 +1542,6 @@ config NFSD_V3_ACL
 config NFSD_V4
 	bool "Provide NFSv4 server support (EXPERIMENTAL)"
 	depends on NFSD_V3 && EXPERIMENTAL
-	select NFSD_TCP
-	select CRYPTO_MD5
-	select CRYPTO
-	select FS_POSIX_ACL
 	help
 	  If you would like to include the NFSv4 server as well as the NFSv2
 	  and NFSv3 servers, say Y here.  This feature is experimental, and