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Date: Mon, 24 Jan 2022 08:01:05 -0800 From: Keith Busch <kbusch@...nel.org> To: linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org, linux-block@...r.kernel.org Cc: axboe@...nel.dk, hch@....de, martin.petersen@...cle.com, colyli@...e.de, arnd@...db.de, Keith Busch <kbusch@...nel.org> Subject: [RFC 5/7] asm-generic: introduce be48 unaligned accessors The NVMe protocol extended data integrity fields with unaligned 48-bit reference tags. Provide some helper accessors in preparation for these. Cc: Arnd Bergmann <arnd@...db.de> Signed-off-by: Keith Busch <kbusch@...nel.org> --- include/asm-generic/unaligned.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/include/asm-generic/unaligned.h b/include/asm-generic/unaligned.h index 1c4242416c9f..8fc637379899 100644 --- a/include/asm-generic/unaligned.h +++ b/include/asm-generic/unaligned.h @@ -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 */ -- 2.25.4
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