[PATCH] RDMA/siw: Solve the error of compiling the 32BIT mips kernel when enable CONFIG_RDMA_SIW

[jianghaoran]

cross-compilation environment：
ubuntu 20.04
mips-linux-gnu-gcc (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0

generate a configuration file by make randconfig:
CONFIG_32BIT=y
CONFIG_RDMA_SIW=y

the error message as follows：
In file included from ../arch/mips/include/asm/page.h:270,
                 from ../arch/mips/include/asm/io.h:29,
                 from ../arch/mips/include/asm/mmiowb.h:5,
                 from ../include/linux/spinlock.h:64,
                 from ../include/linux/wait.h:9,
                 from ../include/linux/net.h:19,
                 from ../drivers/infiniband/sw/siw/siw_qp_tx.c:8:
../drivers/infiniband/sw/siw/siw_qp_tx.c: In function ‘siw_tx_hdt’:
../arch/mips/include/asm/page.h:255:53: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
  255 | #define virt_to_pfn(kaddr)    PFN_DOWN(virt_to_phys((void *)(kaddr)))
      |                                                     ^
../include/asm-generic/memory_model.h:18:41: note: in definition of macro ‘__pfn_to_page’
   18 | #define __pfn_to_page(pfn) (mem_map + ((pfn) - ARCH_PFN_OFFSET))
      |                                         ^~~
../arch/mips/include/asm/page.h:255:31: note: in expansion of macro ‘PFN_DOWN’
  255 | #define virt_to_pfn(kaddr)    PFN_DOWN(virt_to_phys((void *)(kaddr)))
      |                               ^~~~~~~~
../arch/mips/include/asm/page.h:256:41: note: in expansion of macro ‘virt_to_pfn’
  256 | #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
      |                                         ^~~~~~~~~~~
../drivers/infiniband/sw/siw/siw_qp_tx.c:538:23: note: in expansion of macro ‘virt_to_page’
  538 |     page_array[seg] = virt_to_page(va & PAGE_MASK);
      |                       ^~~~~~~~~~~~
cc1: all warnings being treated as errors
make[5]: *** [../scripts/Makefile.build:249: drivers/infiniband/sw/siw/siw_qp_tx.o] Error 1
make[4]: *** [../scripts/Makefile.build:465: drivers/infiniband/sw/siw] Error 2
make[3]: *** [../scripts/Makefile.build:465: drivers/infiniband/sw] Error 2
make[3]: *** Waiting for unfinished jobs....

Reported-by: k2ci <kernel-bot@xxxxxxxxxx>
Signed-off-by: jianghaoran <jianghaoran@xxxxxxxxxx>
---
 drivers/infiniband/sw/siw/siw_qp_tx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/sw/siw/siw_qp_tx.c b/drivers/infiniband/sw/siw/siw_qp_tx.c
index 1f4e60257700..4bd7ccae614e 100644
--- a/drivers/infiniband/sw/siw/siw_qp_tx.c
+++ b/drivers/infiniband/sw/siw/siw_qp_tx.c
@@ -29,7 +29,7 @@ static struct page *siw_get_pblpage(struct siw_mem *mem, u64 addr, int *idx)
 	dma_addr_t paddr = siw_pbl_get_buffer(pbl, offset, NULL, idx);
 
 	if (paddr)
-		return virt_to_page(paddr);
+		return virt_to_page((void*)paddr);
 
 	return NULL;
 }
@@ -533,7 +533,7 @@ static int siw_tx_hdt(struct siw_iwarp_tx *c_tx, struct socket *s)
 					kunmap_local(kaddr);
 				}
 			} else {
-				u64 va = sge->laddr + sge_off;
+				uintptr_t va = sge->laddr + sge_off;
 
 				page_array[seg] = virt_to_page(va & PAGE_MASK);
 				if (do_crc)
-- 
2.25.1


--------------EC65EF279E17B4400AB6BC39--