From c12d3362a74bf0cd9e1d488918d40607b62a3104 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel <ardb@kernel.org> Date: Fri, 8 Nov 2019 13:22:27 +0100 Subject: 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> --- lib/ubsan.c | 2 +- lib/ubsan.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'lib') diff --git a/lib/ubsan.c b/lib/ubsan.c index e7d31735950d..b652cc14dd60 100644 --- a/lib/ubsan.c +++ b/lib/ubsan.c @@ -119,7 +119,7 @@ static void val_to_string(char *str, size_t size, struct type_descriptor *type, { if (type_is_int(type)) { if (type_bit_width(type) == 128) { -#if defined(CONFIG_ARCH_SUPPORTS_INT128) && defined(__SIZEOF_INT128__) +#if defined(CONFIG_ARCH_SUPPORTS_INT128) u_max val = get_unsigned_val(type, value); scnprintf(str, size, "0x%08x%08x%08x%08x", 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 -- cgit v1.2.3