Merge tag 'for-5.18/64bit-pi-2022-03-25' of git://git.kernel.dk/linux-block

Pull block layer 64-bit data integrity support from Jens Axboe:
 "This adds support for 64-bit data integrity in the block layer and in
  NVMe"

* tag 'for-5.18/64bit-pi-2022-03-25' of git://git.kernel.dk/linux-block:
  crypto: fix crc64 testmgr digest byte order
  nvme: add support for enhanced metadata
  block: add pi for extended integrity
  crypto: add rocksoft 64b crc guard tag framework
  lib: add rocksoft model crc64
  linux/kernel: introduce lower_48_bits function
  asm-generic: introduce be48 unaligned accessors
  nvme: allow integrity on extended metadata formats
  block: support pi with extended metadata

1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index a890428bcc1a..08ba5995aa8b 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -64,6 +64,15 @@
 )
 
 /**
+ * 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
  *