From c12d3362a74bf0cd9e1d488918d40607b62a3104 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel 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 Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu --- crypto/ecc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'crypto/ecc.c') diff --git a/crypto/ecc.c b/crypto/ecc.c index 8ee787723c5c..02d35be7702b 100644 --- a/crypto/ecc.c +++ b/crypto/ecc.c @@ -336,7 +336,7 @@ static u64 vli_usub(u64 *result, const u64 *left, u64 right, static uint128_t mul_64_64(u64 left, u64 right) { uint128_t result; -#if defined(CONFIG_ARCH_SUPPORTS_INT128) && defined(__SIZEOF_INT128__) +#if defined(CONFIG_ARCH_SUPPORTS_INT128) unsigned __int128 m = (unsigned __int128)left * right; result.m_low = m; -- cgit v1.2.3-59-g8ed1b