From: Chuck Lever <redacted>

If CONFIG_CRYPTO=n (e.g. arm/shmobile_defconfig):

   WARNING: unmet direct dependencies detected for RPCSEC_GSS_KRB5
     Depends on [n]: NETWORK_FILESYSTEMS [=y] && SUNRPC [=y] && CRYPTO [=n]
     Selected by [y]:
     - NFS_V4 [=y] && NETWORK_FILESYSTEMS [=y] && NFS_FS [=y]

As NFSv4 can work without crypto enabled, remove the RPCSEC_GSS_KRB5
dependency altogether.

Trond says:

It is possible to use the NFSv4.1 client with just AUTH_SYS, and
in fact there are plenty of people out there using only that. The
fact that RFC5661 gets its knickers in a twist about RPCSEC_GSS
support is largely irrelevant to those people.

The other issue is that ’select’ enforces the strict dependency
that if the NFS client is compiled into the kernel, then the
RPCSEC_GSS and kerberos code needs to be compiled in as well: they
cannot exist as modules.

Fixes: e57d065277387980 ("NFS & NFSD: Update GSS dependencies")
Reported-by: kernel test robot <redacted>
Reported-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Suggested-by: Trond Myklebust <redacted>
Signed-off-by: Chuck Lever <redacted>
---
 fs/nfs/Kconfig |    1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig
index 450d6c3bc05e..c1c7ed2fd860 100644
--- a/fs/nfs/Kconfig
+++ b/fs/nfs/Kconfig

@@ -75,7 +75,6 @@ config NFS_V3_ACL
 config NFS_V4
 	tristate "NFS client support for NFS version 4"
 	depends on NFS_FS
-	select RPCSEC_GSS_KRB5
 	select KEYS
 	help
 	  This option enables support for version 4 of the NFS protocol