arm: xen: mm: use __GPF_DMA32 for arm64

arm64 shares some code under arch/arm/xen, including mm.c.
However ZONE_DMA is removed by commit
ad67f5a6545("arm64: replace ZONE_DMA with ZONE_DMA32").

So add a check if CONFIG_ZONE_DMA32 is enabled use __GFP_DMA32.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c
index d33b77e..018093f 100644 (file)
--- a/arch/arm/xen/mm.c
+++ b/arch/arm/xen/mm.c
@@ -28,7 +28,10 @@ unsigned long xen_get_swiotlb_free_pages(unsigned int order)
 
        for_each_memblock(memory, reg) {
                if (reg->base < (phys_addr_t)0xffffffff) {
-                       flags |= __GFP_DMA;
+                       if (IS_ENABLED(CONFIG_ZONE_DMA32))
+                               flags |= __GFP_DMA32;
+                       else
+                               flags |= __GFP_DMA;
                        break;
                }
        }