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block: move lower_48_bits() to block 

The function is not generally applicable enough to be included in the core
kernel header. Move it to block since it's the only subsystem using it.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20220327173316.315-1-kbusch@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Keith Busch 2022-03-27 11:33:16 -06:00 committed by Jens Axboe
parent 286901941f
commit 868e6139c5
2 changed files with 9 additions and 9 deletions
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9
include/linux/kernel.h
View File

@ -63,15 +63,6 @@
} \
)
/**
* lower_48_bits() - return bits 0-47 of a number
* @n: the number we're accessing
*/
static inline u64 lower_48_bits(u64 n)
{
return n & ((1ull << 48) - 1);
}
/**
* upper_32_bits - return bits 32-63 of a number
* @n: the number we're accessing

9
include/linux/t10-pi.h
View File

@ -59,6 +59,15 @@ struct crc64_pi_tuple {
__u8 ref_tag[6];
};
/**
* lower_48_bits() - return bits 0-47 of a number
* @n: the number we're accessing
*/
static inline u64 lower_48_bits(u64 n)
{
return n & ((1ull << 48) - 1);
}
static inline u64 ext_pi_ref_tag(struct request *rq)
{
unsigned int shift = ilog2(queue_logical_block_size(rq->q));