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Mon, 19 Dec 2022 16:43:06 +0100 (CET) Message-ID: <20221219154119.087799661@infradead.org> User-Agent: quilt/0.66 Date: Mon, 19 Dec 2022 16:35:29 +0100 From: Peter Zijlstra To: torvalds@linux-foundation.org Cc: corbet@lwn.net, will@kernel.org, peterz@infradead.org, boqun.feng@gmail.com, mark.rutland@arm.com, catalin.marinas@arm.com, dennis@kernel.org, tj@kernel.org, cl@linux.com, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, Herbert Xu , davem@davemloft.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, joro@8bytes.org, suravee.suthikulpanit@amd.com, robin.murphy@arm.com, dwmw2@infradead.org, baolu.lu@linux.intel.com, Arnd Bergmann , penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, Andrew Morton , vbabka@suse.cz, roman.gushchin@linux.dev, 42.hyeyoo@gmail.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linux-crypto@vger.kernel.org, iommu@lists.linux.dev, linux-arch@vger.kernel.org Subject: [RFC][PATCH 04/12] types: Introduce [us]128 References: <20221219153525.632521981@infradead.org> MIME-Version: 1.0 X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 7987910001D X-Stat-Signature: zjeudxyepqkzujtebsq957jknx45x6nr X-HE-Tag: 1671464622-157805 X-HE-Meta: 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 98Q== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Introduce [us]128 (when available). Unlike [us]64, ensure they are always naturally aligned. This also enables 128bit wide atomics (which require natural alignment) such as cmpxchg128(). Signed-off-by: Peter Zijlstra (Intel) --- include/linux/types.h | 5 +++++ include/uapi/linux/types.h | 4 ++++ 2 files changed, 9 insertions(+) --- a/include/linux/types.h +++ b/include/linux/types.h @@ -10,6 +10,11 @@ #define DECLARE_BITMAP(name,bits) \ unsigned long name[BITS_TO_LONGS(bits)] +#ifdef __SIZEOF_INT128__ +typedef __s128 s128; +typedef __u128 u128; +#endif + typedef u32 __kernel_dev_t; typedef __kernel_fd_set fd_set; --- a/include/uapi/linux/types.h +++ b/include/uapi/linux/types.h @@ -13,6 +13,10 @@ #include +#ifdef __SIZEOF_INT128__ +typedef __signed__ __int128 __s128 __attribute__((aligned(16))); +typedef unsigned __int128 __u128 __attribute__((aligned(16))); +#endif /* * Below are truly Linux-specific types that should never collide with