| Message ID | 20220222163144.1782447-5-kbusch@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | 64-bit data integrity field support | expand |
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 33f47a996513..c1fa9fc2b5cd 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -63,6 +63,12 @@ } \ ) +/** + * lower_48_bits - return bits 0-47 of a number + * @n: the number we're accessing + */ +#define lower_48_bits(n) ((u64)((n) & 0xffffffffffffull)) + /** * upper_32_bits - return bits 32-63 of a number * @n: the number we're accessing
Recent data integrity field enhancements allow 48-bit reference tags. Introduce a helper macro since this will be a repeated operation. Suggested-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Keith Busch <kbusch@kernel.org> --- include/linux/kernel.h | 6 ++++++ 1 file changed, 6 insertions(+)