This adds support for GENMASK_U128() and some corresponding tests as well. GENMASK_U128() generated 128 bit masks will be required later on the arm64 platform for enabling FEAT_SYSREG128 and FEAT_D128 features. Because GENMAKS_U128() depends on __int128 data type being supported in the compiler, its usage needs to be protected with CONFIG_ARCH_SUPPORTS_INT128. Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Yury Norov <yury.norov@xxxxxxxxx> Cc: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx>> Cc: linux-kernel@xxxxxxxxxxxxxxx Cc: linux-arch@xxxxxxxxxxxxxxx Changes in V2: - Wrapped genmask_u128_test() with CONFIG_ARCH_SUPPORTS_INT128 - Defined __BITS_PER_U128 unconditionally as 128 - Defined __GENMASK_U128() via new _BIT128() - Dropped _U128() and _AC128() Changes in V1: https://lore.kernel.org/lkml/20240724103142.165693-1-anshuman.khandual@xxxxxxx/ Anshuman Khandual (2): uapi: Define GENMASK_U128 lib/test_bits.c: Add tests for GENMASK_U128() include/linux/bits.h | 2 ++ include/uapi/asm-generic/bitsperlong.h | 2 ++ include/uapi/linux/bits.h | 3 +++ include/uapi/linux/const.h | 1 + lib/test_bits.c | 25 +++++++++++++++++++++++++ 5 files changed, 33 insertions(+) -- 2.30.2
