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asm-generic: introduce be48 unaligned accessors

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

Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Martin K. Petersen <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Reviewed-by: Chaitanya Kulkarni <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Signed-off-by: Keith Busch <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Keith Busch authored and Jens Axboe committed 2022-03-07 12:48:35 -07:00
1 parent 84b735429f
commit c2ea5fcf53
1 file changed
+26
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include/asm-generic/unaligned.h
+26
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@@ -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 */