NFS: Convert v3 into a module

This patch exports symbols and moves over the final structures needed by
the v3 module.  In addition, I also switch over to using IS_ENABLED() to
check if CONFIG_NFS_V3 or CONFIG_NFS_V3_MODULE are set.

The module (nfs3.ko) will be created in the same directory as nfs.ko and
will be automatically loaded the first time you try to mount over NFS v3.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 999ce750514..558a85c9594 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -69,7 +69,7 @@
 #define NFSDBG_FACILITY         NFSDBG_VFS
 #define NFS_TEXT_DATA           1
 
-#ifdef CONFIG_NFS_V3
+#if IS_ENABLED(CONFIG_NFS_V3)
 #define NFS_DEFAULT_VERSION 3
 #else
 #define NFS_DEFAULT_VERSION 2
@@ -1876,7 +1876,7 @@ static int nfs23_validate_mount_data(void *options,
                 return NFS_TEXT_DATA;
         }
 
-#ifndef CONFIG_NFS_V3
+#if !IS_ENABLED(CONFIG_NFS_V3)
         if (args->version == 3)
                 goto out_v3_not_compiled;
 #endif /* !CONFIG_NFS_V3 */
@@ -1896,7 +1896,7 @@ out_no_sec:
         dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n");
         return -EINVAL;
 
-#ifndef CONFIG_NFS_V3
+#if !IS_ENABLED(CONFIG_NFS_V3)
 out_v3_not_compiled:
         dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n");
         return -EPROTONOSUPPORT;