[PATCH 3/3] infiniband: rxe: fix 32-bit build warnings

[Arnd Bergmann]

The new rxe infinband driver passes around pointers that have been
converted to 64-bit integers. This is valid, but causes compile-time
warnings on all 32-bit architectures:

infiniband/hw/rxe/rxe_dma.c: In function 'rxe_dma_map_single':
infiniband/hw/rxe/rxe_dma.c:49:9: error: cast from pointer to integer of 
different size [-Werror=pointer-to-int-cast]
  return (u64)cpu_addr;
         ^
infiniband/hw/rxe/rxe_dma.c: In function 'rxe_dma_map_page':
infiniband/hw/rxe/rxe_dma.c:73:9: error: cast from pointer to integer of 
different size [-Werror=pointer-to-int-cast]
infiniband/hw/rxe/rxe_dma.c: In function 'rxe_map_sg':
infiniband/hw/rxe/rxe_dma.c:99:10: error: cast from pointer to integer of 
different size [-Werror=pointer-to-int-cast]
infiniband/hw/rxe/rxe_dma.c: In function 'rxe_dma_alloc_coherent':
infiniband/hw/rxe/rxe_dma.c:143:17: error: cast from pointer to integer of 
different size [-Werror=pointer-to-int-cast]

This changes the cast to use 'uintptr_t', which can always be
cast to and from pointer, and can be assigned to and from 64-bit
integers.

Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
 drivers/infiniband/hw/rxe/rxe_dma.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/hw/rxe/rxe_dma.c 
b/drivers/infiniband/hw/rxe/rxe_dma.c
index f080bc5bda43..7634c1a81b2b 100644
--- a/drivers/infiniband/hw/rxe/rxe_dma.c
+++ b/drivers/infiniband/hw/rxe/rxe_dma.c
@@ -46,7 +46,7 @@ static u64 rxe_dma_map_single(struct ib_device *dev,
                              enum dma_data_direction direction)
 {
        WARN_ON(!valid_dma_direction(direction));
-       return (u64)cpu_addr;
+       return (uintptr_t)cpu_addr;
 }
 
 static void rxe_dma_unmap_single(struct ib_device *dev,
@@ -70,7 +70,7 @@ static u64 rxe_dma_map_page(struct ib_device *dev,
                goto done;
        }
 
-       addr = (u64)page_address(page);
+       addr = (uintptr_t)page_address(page);
        if (addr)
                addr += offset;
 
@@ -96,7 +96,7 @@ static int rxe_map_sg(struct ib_device *dev, struct 
scatterlist *sgl,
        WARN_ON(!valid_dma_direction(direction));
 
        for_each_sg(sgl, sg, nents, i) {
-               addr = (u64)page_address(sg_page(sg));
+               addr = (uintptr_t)page_address(sg_page(sg));
                if (!addr) {
                        ret = 0;
                        break;
@@ -140,7 +140,7 @@ static void *rxe_dma_alloc_coherent(struct ib_device *dev, 
size_t size,
                addr = page_address(p);
 
        if (dma_handle)
-               *dma_handle = (u64)addr;
+               *dma_handle = (uintptr_t)addr;
 
        return addr;
 }
-- 
2.7.0