Remove gperf usage from toolchain

It turns out that gperf-3.1 changed types in the generated code in ways
that aren't even trivially detectable without having to generate a test-file.

It's just not worth using tools and libraries from clowns that don't
understand or care about compatibility.  So get rid of gperf.

Signed-off-by: Linus Torvalds <[email protected]>

Author: torvalds

Documentation/dontdiff

@@ -259,5 +259,4 @@ wakeup.bin
 wakeup.elf
 wakeup.lds
 zImage*
-zconf.hash.c
 zoffset.h

scripts/genksyms/Makefile

@@ -9,6 +9,6 @@ HOSTCFLAGS_parse.tab.o := -I$(src)
 HOSTCFLAGS_lex.lex.o := -I$(src)
 
 # dependencies on generated files need to be listed explicitly
-$(obj)/lex.lex.o: $(obj)/keywords.hash.c $(obj)/parse.tab.h
+$(obj)/lex.lex.o: $(obj)/parse.tab.h
 
-clean-files	:= keywords.hash.c lex.lex.c parse.tab.c parse.tab.h
+clean-files	:= lex.lex.c parse.tab.c parse.tab.h

scripts/genksyms/keywords.c

@@ -0,0 +1,74 @@
+static struct resword {
+	const char *name;
+	int token;
+} keywords[] = {
+	{ "EXPORT_SYMBOL", EXPORT_SYMBOL_KEYW },
+	{ "EXPORT_SYMBOL_GPL", EXPORT_SYMBOL_KEYW },
+	{ "EXPORT_SYMBOL_GPL_FUTURE", EXPORT_SYMBOL_KEYW },
+	{ "EXPORT_UNUSED_SYMBOL", EXPORT_SYMBOL_KEYW },
+	{ "EXPORT_UNUSED_SYMBOL_GPL", EXPORT_SYMBOL_KEYW },
+	{ "__asm", ASM_KEYW },
+	{ "__asm__", ASM_KEYW },
+	{ "__attribute", ATTRIBUTE_KEYW },
+	{ "__attribute__", ATTRIBUTE_KEYW },
+	{ "__const", CONST_KEYW },
+	{ "__const__", CONST_KEYW },
+	{ "__extension__", EXTENSION_KEYW },
+	{ "__inline", INLINE_KEYW },
+	{ "__inline__", INLINE_KEYW },
+	{ "__signed", SIGNED_KEYW },
+	{ "__signed__", SIGNED_KEYW },
+	{ "__typeof", TYPEOF_KEYW },
+	{ "__typeof__", TYPEOF_KEYW },
+	{ "__volatile", VOLATILE_KEYW },
+	{ "__volatile__", VOLATILE_KEYW },
+	{ "__builtin_va_list", VA_LIST_KEYW },
+
+	// According to rth, c99 defines "_Bool", __restrict", __restrict__", "restrict".  KAO
+	{ "_Bool", BOOL_KEYW },
+	{ "_restrict", RESTRICT_KEYW },
+	{ "__restrict__", RESTRICT_KEYW },
+	{ "restrict", RESTRICT_KEYW },
+	{ "asm", ASM_KEYW },
+
+	// attribute commented out in modutils 2.4.2.  People are using 'attribute' as a
+	// field name which breaks the genksyms parser.  It is not a gcc keyword anyway.
+	// KAO. },
+	// { "attribute", ATTRIBUTE_KEYW },
+
+	{ "auto", AUTO_KEYW },
+	{ "char", CHAR_KEYW },
+	{ "const", CONST_KEYW },
+	{ "double", DOUBLE_KEYW },
+	{ "enum", ENUM_KEYW },
+	{ "extern", EXTERN_KEYW },
+	{ "float", FLOAT_KEYW },
+	{ "inline", INLINE_KEYW },
+	{ "int", INT_KEYW },
+	{ "long", LONG_KEYW },
+	{ "register", REGISTER_KEYW },
+	{ "short", SHORT_KEYW },
+	{ "signed", SIGNED_KEYW },
+	{ "static", STATIC_KEYW },
+	{ "struct", STRUCT_KEYW },
+	{ "typedef", TYPEDEF_KEYW },
+	{ "typeof", TYPEOF_KEYW },
+	{ "union", UNION_KEYW },
+	{ "unsigned", UNSIGNED_KEYW },
+	{ "void", VOID_KEYW },
+	{ "volatile", VOLATILE_KEYW },
+};
+
+#define NR_KEYWORDS (sizeof(keywords)/sizeof(struct resword))
+
+static int is_reserved_word(register const char *str, register unsigned int len)
+{
+	int i;
+	for (i = 0; i < NR_KEYWORDS; i++) {
+		struct resword *r = keywords + i;
+		int l = strlen(r->name);
+		if (len == l && !memcmp(str, r->name, len))
+			return r->token;
+	}
+	return -1;
+}