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types: Introduce [us]128

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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
This commit is contained in:
Peter Zijlstra 2023-05-31 15:08:35 +02:00
parent f413e72481
commit 224d80c584
4 changed files with 9 additions and 4 deletions
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5
include/linux/types.h
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@ -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;

4
include/uapi/linux/types.h
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@ -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

2
lib/crypto/curve25519-hacl64.c
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@ -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;

2
lib/crypto/poly1305-donna64.c
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@ -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])
{