Without this, any board that doesn't enable read-write FAT triggers:
fs/fat/ff.c:1331:6: warning: ‘gen_numname’ defined but not used 
[-Wunused-function]

... since gen_numname() is not referenced from dir_register() is ifdef'd
out.

Signed-off-by: Stephen Warren <swar...@wwwdotorg.org>
---
v2: New patch.
---
 fs/fat/ff.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/fat/ff.c b/fs/fat/ff.c
index fe7764d6daa2..c2527d50a506 100644
--- a/fs/fat/ff.c
+++ b/fs/fat/ff.c
@@ -1326,6 +1326,7 @@ void fit_lfn (
 /*-----------------------------------------------------------------------*/
 /* Create numbered name                                                  */
 /*-----------------------------------------------------------------------*/
+#if !_FS_READONLY
 #if _USE_LFN
 static
 void gen_numname (
@@ -1378,6 +1379,7 @@ void gen_numname (
        } while (j < 8);
 }
 #endif
+#endif
 
 
 
-- 
1.9.1

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