mount: document when kernel started accepting string as NFS options

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/util-linux/mount.c b/util-linux/mount.c
index d954febe5..1ebc7247b 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -942,6 +942,9 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
         char *hostname;
         char *pathname;
         char *mounthost;
+        /* prior to 2.6.23, kernel took NFS options in a form of this struct
+         * only. 2.6.23+ looks at data->version, and if it's not 1..6,
+         * then data pointer is interpreted as a string. */
         struct nfs_mount_data data;
         char *opt;
         struct hostent *hp;
@@ -968,7 +971,7 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
         int nfsprog;
         int nfsvers;
         int retval;
-        /* these all are one-bit really. 4.3.1 likes this combination: */
+        /* these all are one-bit really. gcc 4.3.1 likes this combination: */
         smallint tcp;
         smallint soft;
         int intr;