[PATCH] 9p: hide cachetag option for non-CONFIG_9P_FSCACHE

[Arnd Bergmann]

show_options cannot print this option when it is disabled in Kconfig:

fs/9p/v9fs.c: In function 'v9fs_show_options':
fs/9p/v9fs.c:140:13: error: 'struct v9fs_session_info' has no member named 
'cachetag'; did you mean 'cache'?

Fixes: ccb0055985b9 ("9p: Implement show_options")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
 fs/9p/v9fs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index d69046650a36..8fb89ddc6cc7 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -137,8 +137,10 @@ int v9fs_show_options(struct seq_file *m, struct dentry 
*root)
                seq_puts(m, ",nodevmap");
        if (v9ses->cache)
                seq_printf(m, ",%s", v9fs_cache_modes[v9ses->cache]);
+#ifdef CONFIG_9P_FSCACHE
        if (v9ses->cachetag && v9ses->cache == CACHE_FSCACHE)
                seq_printf(m, ",cachetag=%s", v9ses->cachetag);
+#endif
 
        switch (v9ses->flags & V9FS_ACCESS_MASK) {
        case V9FS_ACCESS_USER:
-- 
2.9.0