Commit 868e6139 authored Mar 27, 2022 by Keith Busch Committed by Jens Axboe Apr 11, 2022

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>

parent 28690194

include/linux/kernel.h

+0 −9

Original line number	Diff line number	Diff line
		@@ -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

include/linux/t10-pi.h

+9 −0

Original line number	Diff line number	Diff line
		@@ -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));