genksyms: Teach parser about 128-bit built-in types

__uint128_t crops up in a few files that export symbols to modules, so
teach genksyms about it and the other GCC built-in 128-bit integer types
so that we don't end up skipping the CRC generation for some symbols due
to the parser failing to spot them:

  | WARNING: EXPORT symbol "kernel_neon_begin" [vmlinux] version
  |          generation failed, symbol will not be versioned.
  | ld: arch/arm64/kernel/fpsimd.o: relocation R_AARCH64_ABS32 against
  |     `__crc_kernel_neon_begin' can not be used when making a shared
  |     object
  | ld: arch/arm64/kernel/fpsimd.o:(.data+0x0): dangerous relocation:
  |     unsupported relocation

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

2 files changed, 6 insertions, 0 deletions

diff --git a/scripts/genksyms/keywords.c b/scripts/genksyms/keywords.c
index e93336baaaed..c586d32dd2c3 100644
--- a/scripts/genksyms/keywords.c
+++ b/scripts/genksyms/keywords.c
@@ -25,6 +25,10 @@ static struct resword {
         { "__volatile__", VOLATILE_KEYW },
         { "__builtin_va_list", VA_LIST_KEYW },
 
+        { "__int128", BUILTIN_INT_KEYW },
+        { "__int128_t", BUILTIN_INT_KEYW },
+        { "__uint128_t", BUILTIN_INT_KEYW },
+
         // According to rth, c99 defines "_Bool", __restrict", __restrict__", "restrict".  KAO
         { "_Bool", BOOL_KEYW },
         { "_restrict", RESTRICT_KEYW },
diff --git a/scripts/genksyms/parse.y b/scripts/genksyms/parse.y
index 00a6d7e54971..1ebcf52cd0f9 100644
--- a/scripts/genksyms/parse.y
+++ b/scripts/genksyms/parse.y
@@ -76,6 +76,7 @@ static void record_compound(struct string_list **keyw,
 %token ATTRIBUTE_KEYW
 %token AUTO_KEYW
 %token BOOL_KEYW
+%token BUILTIN_INT_KEYW
 %token CHAR_KEYW
 %token CONST_KEYW
 %token DOUBLE_KEYW
@@ -263,6 +264,7 @@ simple_type_specifier:
         | VOID_KEYW
         | BOOL_KEYW
         | VA_LIST_KEYW
+        | BUILTIN_INT_KEYW
         | TYPE                  { (*$1)->tag = SYM_TYPEDEF; $$ = $1; }
         ;