On Wed, Dec 11, 2019 at 10:07:54AM +0000, Ard Biesheuvel wrote:
On Tue, 10 Dec 2019 at 22:13, Sasha Levin <sashal@xxxxxxxxxx> wrote:
From: Ard Biesheuvel <ardb@xxxxxxxxxx>
[ Upstream commit c12d3362a74bf0cd9e1d488918d40607b62a3104 ]
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@xxxxxxxxxxxxx>
Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
This does not fix a bug so no need to put it in -stable
Dropped, thanks!
--
Thanks,
Sasha
