genksyms: Do not expand internal types

Consider structures, unions and enums defined in the source file as
internal and do not expand them. This way, changes to e.g. struct
serial_private in drivers/tty/serial/8250_pci.c will not affect the
checksum of the pciserial_* exports.

4 files changed, 20 insertions, 2 deletions

diff --git a/scripts/genksyms/genksyms.c b/scripts/genksyms/genksyms.c
index 6d3fda0ce2ae..8a106499ec4f 100644
--- a/scripts/genksyms/genksyms.c
+++ b/scripts/genksyms/genksyms.c
@@ -40,7 +40,8 @@ static struct symbol *symtab[HASH_BUCKETS];
 static FILE *debugfile;
 
 int cur_line = 1;
-char *cur_filename;
+char *cur_filename, *source_file;
+int in_source_file;
 
 static int flag_debug, flag_dump_defs, flag_reference, flag_dump_types,
            flag_preserve, flag_warnings;
diff --git a/scripts/genksyms/genksyms.h b/scripts/genksyms/genksyms.h
index 7ec52ae3846a..3bffdcaaa274 100644
--- a/scripts/genksyms/genksyms.h
+++ b/scripts/genksyms/genksyms.h
@@ -37,6 +37,7 @@ enum symbol_status {
 struct string_list {
         struct string_list *next;
         enum symbol_type tag;
+        int in_source_file;
         char *string;
 };
 
@@ -57,7 +58,8 @@ typedef struct string_list **yystype;
 #define YYSTYPE yystype
 
 extern int cur_line;
-extern char *cur_filename;
+extern char *cur_filename, *source_file;
+extern int in_source_file;
 
 struct symbol *find_symbol(const char *name, enum symbol_type ns, int exact);
 struct symbol *add_symbol(const char *name, enum symbol_type type,
diff --git a/scripts/genksyms/lex.l b/scripts/genksyms/lex.l
index 400ae06a70df..f770071719cb 100644
--- a/scripts/genksyms/lex.l
+++ b/scripts/genksyms/lex.l
@@ -116,6 +116,7 @@ MC_TOKEN		([~%^&*+=|<>/-]=)|(&&)|("||")|(->)|(<<)|(>>)
                           cur_node->tag =                                  \
                             find_symbol(cur_node->string, SYM_ENUM_CONST, 1)?\
                             SYM_ENUM_CONST : SYM_NORMAL ;                  \
+                          cur_node->in_source_file = in_source_file;       \
                         } while (0)
 
 #define APP             _APP(yytext, yyleng)
@@ -166,6 +167,13 @@ repeat:
       cur_filename = memcpy(xmalloc(e-file+1), file, e-file+1);
       cur_line = atoi(yytext+2);
 
+      if (!source_file) {
+        source_file = xstrdup(cur_filename);
+        in_source_file = 1;
+      } else {
+        in_source_file = (strcmp(cur_filename, source_file) == 0);
+      }
+
       goto repeat;
     }
 
diff --git a/scripts/genksyms/parse.y b/scripts/genksyms/parse.y
index a783ad4e2b51..23c39998ad86 100644
--- a/scripts/genksyms/parse.y
+++ b/scripts/genksyms/parse.y
@@ -58,6 +58,13 @@ static void record_compound(struct string_list **keyw,
                        enum symbol_type type)
 {
         struct string_list *b = *body, *i = *ident, *r;
+
+        if (i->in_source_file) {
+                remove_node(keyw);
+                (*ident)->tag = type;
+                remove_list(body, ident);
+                return;
+        }
         r = copy_node(i); r->tag = type;
         r->next = (*keyw)->next; *body = r; (*keyw)->next = NULL;
         add_symbol(i->string, type, b, is_extern);