RDMA/amso1100: use offset_in_page macro

Use offset_in_page macro instead of (addr & ~PAGE_MASK).
Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rdma/amso1100/c2_alloc.c

@@ -131,7 +131,7 @@ void c2_free_mqsp(__be16 *mqsp)
 	*mqsp = (__force __be16) head->head;
 
 	/* Compute the shared_ptr index */
-	idx = ((unsigned long) mqsp & ~PAGE_MASK) >> 1;
+	idx = (offset_in_page(mqsp)) >> 1;
 	idx -= (unsigned long) &(((struct sp_chunk *) 0)->shared_ptr[0]) >> 1;
 
 	/* Point this index at the head */

drivers/staging/rdma/amso1100/c2_provider.c

@@ -359,7 +359,7 @@ static struct ib_mr *c2_reg_phys_mr(struct ib_pd *ib_pd,
 
 	for (i = 0; i < num_phys_buf; i++) {
 
-		if (buffer_list[i].addr & ~PAGE_MASK) {
+		if (offset_in_page(buffer_list[i].addr)) {
 			pr_debug("Unaligned Memory Buffer: 0x%x\n",
 				(unsigned int) buffer_list[i].addr);
 			return ERR_PTR(-EINVAL);