kbuild: genksyms fix for typeof handling

The tokenizer misses counting an open-parenthesis when parsing a
non-trivial typeof beginning with an open-parenthesis. This function
in include/linux/ceph/libceph.h

static type *lookup_##name(struct rb_root *root,
                           typeof(((type *)0)->keyfld) key)

When instantiated in net/ceph/mon_client.c, causes subsequent symbols
including an EXPORT_SYMBOL in that file to be lost.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>

diff --git a/scripts/genksyms/lex.l b/scripts/genksyms/lex.l
index e583565..5235aa5 100644 (file)
--- a/scripts/genksyms/lex.l
+++ b/scripts/genksyms/lex.l
@@ -289,6 +289,23 @@ repeat:
        }
       break;
 
+    case ST_TYPEOF_1:
+      if (token == IDENT)
+       {
+         if (is_reserved_word(yytext, yyleng)
+             || find_symbol(yytext, SYM_TYPEDEF, 1))
+           {
+             yyless(0);
+             unput('(');
+             lexstate = ST_NORMAL;
+             token = TYPEOF_KEYW;
+             break;
+           }
+         _APP("(", 1);
+       }
+       lexstate = ST_TYPEOF;
+       /* FALLTHRU */
+
     case ST_TYPEOF:
       switch (token)
        {
@@ -313,24 +330,6 @@ repeat:
        }
       break;
 
-    case ST_TYPEOF_1:
-      if (token == IDENT)
-       {
-         if (is_reserved_word(yytext, yyleng)
-             || find_symbol(yytext, SYM_TYPEDEF, 1))
-           {
-             yyless(0);
-             unput('(');
-             lexstate = ST_NORMAL;
-             token = TYPEOF_KEYW;
-             break;
-           }
-         _APP("(", 1);
-       }
-       APP;
-       lexstate = ST_TYPEOF;
-       goto repeat;
-
     case ST_BRACKET:
       APP;
       switch (token)