[Xen-devel] [PATCH v2] swiotlb-xen: Convert to use macro

[Souptick Joarder <jrdr.linux@xxxxxxxxx>]

Rather than using static int max_dma_bits, this
can be coverted to use as macro.

Signed-off-by: Souptick Joarder <jrdr.linux@xxxxxxxxx>
Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
---
 drivers/xen/swiotlb-xen.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index ae1df49..d1eced5 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -38,6 +38,7 @@
 #include <asm/xen/page-coherent.h>
 
 #include <trace/events/swiotlb.h>
+#define MAX_DMA_BITS 32
 /*
  * Used to do a quick range check in swiotlb_tbl_unmap_single and
  * swiotlb_tbl_sync_single_*, to see if the memory was in fact allocated by 
this
@@ -114,8 +115,6 @@ static int is_xen_swiotlb_buffer(dma_addr_t dma_addr)
        return 0;
 }
 
-static int max_dma_bits = 32;
-
 static int
 xen_swiotlb_fixup(void *buf, size_t size, unsigned long nslabs)
 {
@@ -135,7 +134,7 @@ static int is_xen_swiotlb_buffer(dma_addr_t dma_addr)
                                p + (i << IO_TLB_SHIFT),
                                get_order(slabs << IO_TLB_SHIFT),
                                dma_bits, &dma_handle);
-               } while (rc && dma_bits++ < max_dma_bits);
+               } while (rc && dma_bits++ < MAX_DMA_BITS);
                if (rc)
                        return rc;
 
-- 
1.9.1


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