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diff --git a/src/stat.c b/src/stat.c
index f058931d8222a09f51e20ce19a3754ac8a5924b4..841cffa093ee5abbfe0de1c44bfeb7d525fcf755 100644 (file)
--- a/src/stat.c
+++ b/src/stat.c
@@ -124,6 +124,12 @@ human_fstype (STRUCT_STATVFS const *statfsbuf)
   switch (statfsbuf->f_type)
     {
 # if defined __linux__
+
+      /* IMPORTANT NOTE: Each of the following `case S_MAGIC_...:'
+        statements must be followed by a hexadecimal constant in
+        a comment.  The S_MAGIC_... name and constant are automatically
+        combined to produce the #define directives in fs.h.  */
+
     case S_MAGIC_AFFS: /* 0xADFF */
       type = "affs";
       break;