On 2020/4/5 下午4:14, Michael S. Tsirkin wrote:
set_dma_ops isn't available on all architectures:

         make ARCH=um
...

    drivers/vdpa/vdpa_sim/vdpa_sim.c: In function 'vdpasim_create':
drivers/vdpa/vdpa_sim/vdpa_sim.c:324:2: error: implicit declaration of function 
'set_dma_ops'; did you mean 'set_groups'?
+[-Werror=implicit-function-declaration]
      set_dma_ops(dev, &vdpasim_dma_ops);
      ^~~~~~~~~~~
      set_groups

Signed-off-by: Michael S. Tsirkin <[email protected]>
---
  drivers/vdpa/Kconfig | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig
index 08b615f2da39..d0cb0e583a5d 100644
--- a/drivers/vdpa/Kconfig
+++ b/drivers/vdpa/Kconfig
@@ -14,7 +14,7 @@ if VDPA_MENU
config VDPA_SIM
        tristate "vDPA device simulator"
-       depends on RUNTIME_TESTING_MENU
+       depends on RUNTIME_TESTING_MENU && HAS_DMA
        select VDPA
        select VHOST_RING
        select VHOST_IOTLB


Acked-by: Jason Wang <[email protected]>


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