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| author | Ard Biesheuvel <ardb@kernel.org> | 2019-11-08 15:22:27 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-11-17 04:02:42 +0300 |
| commit | c12d3362a74bf0cd9e1d488918d40607b62a3104 (patch) | |
| tree | 64959cb56d0c20f365e28e3f45b9ce9d6a779d13 /lib | |
| parent | a11d055e7a64ac34a5e99b6fe731299449cbcd58 (diff) | |
| download | linux-c12d3362a74bf0cd9e1d488918d40607b62a3104.tar.xz | |
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')
| -rw-r--r-- | lib/ubsan.c | 2 | ||||
| -rw-r--r-- | lib/ubsan.h | 2 |
2 files changed, 2 insertions, 2 deletions
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 |