| Message ID | 20220303201312.3255347-5-kbusch@kernel.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Herbert Xu |
| Headers | show |
| Series | 64-bit data integrity field support | expand |
On 3/3/22 12:13, Keith Busch wrote: > Recent data integrity field enhancements allow reference tags to be up > to 48 bits. Introduce an inline helper function since this will be a > repeated operation. Reviewed-by: Bart Van Assche <bvanassche@acm.org>
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 33f47a996513..3877478681b9 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -63,6 +63,15 @@ } \ ) +/** + * 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
Recent data integrity field enhancements allow reference tags to be up to 48 bits. Introduce an inline helper function 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 | 9 +++++++++ 1 file changed, 9 insertions(+)