Commit c2ea5fcf authored by Keith Busch's avatar Keith Busch Committed by Jens Axboe
Browse files

asm-generic: introduce be48 unaligned accessors 



The NVMe protocol extended the data integrity fields with unaligned
48-bit reference tags. Provide some helper accessors in
preparation for these.

Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Reviewed-by: default avatarChaitanya Kulkarni <kch@nvidia.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarKeith Busch <kbusch@kernel.org>
Reviewed-by: default avatarBart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20220303201312.3255347-4-kbusch@kernel.org


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 84b73542

include/asm-generic/unaligned.h

+26 −0
Original line number Diff line number Diff line
@@ -126,4 +126,30 @@ static inline void put_unaligned_le24(const u32 val, void *p) 
	__put_unaligned_le24(val, p);

}



static inline void __put_unaligned_be48(const u64 val, __u8 *p)

{

	*p++ = val >> 40;

	*p++ = val >> 32;

	*p++ = val >> 24;

	*p++ = val >> 16;

	*p++ = val >> 8;

	*p++ = val;

}



static inline void put_unaligned_be48(const u64 val, void *p)

{

	__put_unaligned_be48(val, p);

}



static inline u64 __get_unaligned_be48(const u8 *p)

{

	return (u64)p[0] << 40 | (u64)p[1] << 32 | p[2] << 24 |

		p[3] << 16 | p[4] << 8 | p[5];

}



static inline u64 get_unaligned_be48(const void *p)

{

	return __get_unaligned_be48(p);

}



#endif /* __ASM_GENERIC_UNALIGNED_H */