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authorArd Biesheuvel <ardb@kernel.org>2019-11-08 13:22:27 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2019-11-17 09:02:42 +0800
commitc12d3362a74bf0cd9e1d488918d40607b62a3104 (patch)
tree64959cb56d0c20f365e28e3f45b9ce9d6a779d13 /lib/ubsan.h
parenta11d055e7a64ac34a5e99b6fe731299449cbcd58 (diff)
downloadlinux-c12d3362a74bf0cd9e1d488918d40607b62a3104.tar.bz2
int128: move __uint128_t compiler test to Kconfig
In order to use 128-bit integer arithmetic in C code, the architecture needs to have declared support for it by setting ARCH_SUPPORTS_INT128, and it requires a version of the toolchain that supports this at build time. This is why all existing tests for ARCH_SUPPORTS_INT128 also test whether __SIZEOF_INT128__ is defined, since this is only the case for compilers that can support 128-bit integers. Let's fold this additional test into the Kconfig declaration of ARCH_SUPPORTS_INT128 so that we can also use the symbol in Makefiles, e.g., to decide whether a certain object needs to be included in the first place. Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'lib/ubsan.h')
-rw-r--r--lib/ubsan.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/ubsan.h b/lib/ubsan.h
index b8fa83864467..7b56c09473a9 100644
--- a/lib/ubsan.h
+++ b/lib/ubsan.h
@@ -78,7 +78,7 @@ struct invalid_value_data {
struct type_descriptor *type;
};
-#if defined(CONFIG_ARCH_SUPPORTS_INT128) && defined(__SIZEOF_INT128__)
+#if defined(CONFIG_ARCH_SUPPORTS_INT128)
typedef __int128 s_max;
typedef unsigned __int128 u_max;
#else