Several places want to compute the lower and/or upper bounds of a
dma_range_map, so let's factor that out into reusable helpers.
Acked-by: Rob Herring <robh@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx>
---
v2: fix warning for 32-bit builds
---
arch/loongarch/kernel/dma.c | 9 ++-------
drivers/acpi/arm64/dma.c | 8 +-------
drivers/of/device.c | 11 ++---------
include/linux/dma-direct.h | 18 ++++++++++++++++++
4 files changed, 23 insertions(+), 23 deletions(-)