Commit 224d80c5 authored by Peter Zijlstra's avatar Peter Zijlstra
Browse files

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: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
Reviewed-by: default avatarMark Rutland <mark.rutland@arm.com>
Acked-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Tested-by: default avatarMark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20230531132323.385005581@infradead.org
parent f413e724

include/linux/types.h

+5 −0
Original line number Diff line number Diff line
@@ -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;

include/uapi/linux/types.h

+4 −0
Original line number Diff line number Diff line
@@ -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

lib/crypto/curve25519-hacl64.c

+0 −2
Original line number Diff line number Diff line
@@ -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;

lib/crypto/poly1305-donna64.c

+0 −2
Original line number Diff line number Diff line
@@ -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])

{