[PATCH v4 2/5] RISC-V: Add preprocessor directive for swiotlb

[Zong Li]

On RV32, it doesn't select the SWIOTLB, only RV64 support swiotlb now.

Signed-off-by: Zong Li <zong@xxxxxxxxxxxxx>
---
 arch/riscv/kernel/setup.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index aee6031..6de6584 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -227,7 +227,10 @@ void __init setup_arch(char **cmdline_p)
 	setup_bootmem();
 	paging_init();
 	unflatten_device_tree();
+
+#ifdef CONFIG_SWIOTLB
 	swiotlb_init(1);
+#endif
 
 #ifdef CONFIG_SMP
 	setup_smp();
-- 
2.7.4