virito_pci libray: hide vp_modern_map_capability()

mainline inclusion
from mainline-v5.13-rc1
commit fd466b36
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5WXCZ
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd466b36940b22a506265edf12714bd0cf9ed836

----------------------------------------------------------------------

No user now and the capability should not be setup
externally. Instead, every access to the capability should be done via
virtio_pci_modern_device.
Signed-off-by: NJason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210415073147.19331-6-jasowang@redhat.comSigned-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NEli Cohen <elic@nvidia.com>
Signed-off-by: NPengyuan Zhao <zhaopengyuan@hisilicon.com>

drivers/virtio/virtio_pci_modern_dev.c

@@ -17,10 +17,9 @@
  *
  * Returns the io address of for the part of the capability
  */
-void __iomem *vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
-				       size_t minlen,
-				       u32 align,
-				       u32 start, u32 size,
+static void __iomem*
+vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
+			 size_t minlen, u32 align, u32 start, u32 size,
 			 size_t *len, resource_size_t *pa)
 {
 	struct pci_dev *dev = mdev->pci_dev;
@@ -95,7 +94,6 @@ void __iomem *vp_modern_map_capability(struct virtio_pci_modern_device *mdev, in
 
 	return p;
 }
-EXPORT_SYMBOL_GPL(vp_modern_map_capability);
 
 /**
  * virtio_pci_find_capability - walk capabilities to find device info.

include/linux/virtio_pci_modern.h

@@ -102,11 +102,6 @@ void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev,
 u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
 			     u16 idx);
 u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev);
-void __iomem *vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
-				       size_t minlen,
-				       u32 align,
-				       u32 start, u32 size,
-				       size_t *len, resource_size_t *pa);
 void __iomem *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
 				      u16 index, resource_size_t *pa);
 int vp_modern_probe(struct virtio_pci_modern_device *mdev);