From 224d80c584d3016cb8d83d1c33914fdd3508aa8c Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 31 May 2023 15:08:35 +0200
Subject: [PATCH] types: Introduce [us]128

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) <peterz@infradead.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20230531132323.385005581@infradead.org
---
 include/linux/types.h          | 5 +++++
 include/uapi/linux/types.h     | 4 ++++
 lib/crypto/curve25519-hacl64.c | 2 --
 lib/crypto/poly1305-donna64.c  | 2 --
 4 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/include/linux/types.h b/include/linux/types.h
index 688fb943556a..becb8cd5916f 100644
--- 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;
diff --git a/include/uapi/linux/types.h b/include/uapi/linux/types.h
index 308433be33c2..6375a0684052 100644
--- a/include/uapi/linux/types.h
+++ b/include/uapi/linux/types.h
@@ -13,6 +13,10 @@
 
 #include <linux/posix_types.h>
 
+#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
diff --git a/lib/crypto/curve25519-hacl64.c b/lib/crypto/curve25519-hacl64.c
index 771d82dc5f14..c40e5d913234 100644
--- a/lib/crypto/curve25519-hacl64.c
+++ b/lib/crypto/curve25519-hacl64.c
@@ -14,8 +14,6 @@
 #include <crypto/curve25519.h>
 #include <linux/string.h>
 
-typedef __uint128_t u128;
-
 static __always_inline u64 u64_eq_mask(u64 a, u64 b)
 {
 	u64 x = a ^ b;
diff --git a/lib/crypto/poly1305-donna64.c b/lib/crypto/poly1305-donna64.c
index d34cf4053668..988702c9b3b2 100644
--- a/lib/crypto/poly1305-donna64.c
+++ b/lib/crypto/poly1305-donna64.c
@@ -10,8 +10,6 @@
 #include <asm/unaligned.h>
 #include <crypto/internal/poly1305.h>
 
-typedef __uint128_t u128;
-
 void poly1305_core_setkey(struct poly1305_core_key *key,
 			  const u8 raw_key[POLY1305_BLOCK_SIZE])
 {