virtio-blk: make some functions static

Some functions that were called from the dataplane code are now only used
locally:

virtio_blk_init_request()
virtio_blk_handle_request()
virtio_blk_submit_multireq()

since commit "03de2f527499 virtio-blk: do not use vring in dataplane", and

virtio_blk_free_request()

since commit "6aa46d8ff1ee virtio: move VirtQueueElement at the beginning
of the structs".

This patch converts them to static.

Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/block/virtio-blk.c

@@ -29,8 +29,8 @@
 #include "hw/virtio/virtio-bus.h"
 #include "hw/virtio/virtio-access.h"
 
-void virtio_blk_init_request(VirtIOBlock *s, VirtQueue *vq,
-                             VirtIOBlockReq *req)
+static void virtio_blk_init_request(VirtIOBlock *s, VirtQueue *vq,
+                                    VirtIOBlockReq *req)
 {
     req->dev = s;
     req->vq = vq;
@@ -40,7 +40,7 @@ void virtio_blk_init_request(VirtIOBlock *s, VirtQueue *vq,
     req->mr_next = NULL;
 }
 
-void virtio_blk_free_request(VirtIOBlockReq *req)
+static void virtio_blk_free_request(VirtIOBlockReq *req)
 {
     if (req) {
         g_free(req);
@@ -381,7 +381,7 @@ static int multireq_compare(const void *a, const void *b)
     }
 }
 
-void virtio_blk_submit_multireq(BlockBackend *blk, MultiReqBuffer *mrb)
+static void virtio_blk_submit_multireq(BlockBackend *blk, MultiReqBuffer *mrb)
 {
     int i = 0, start = 0, num_reqs = 0, niov = 0, nb_sectors = 0;
     uint32_t max_transfer;
@@ -468,7 +468,7 @@ static bool virtio_blk_sect_range_ok(VirtIOBlock *dev,
     return true;
 }
 
-void virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb)
+static void virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb)
 {
     uint32_t type;
     struct iovec *in_iov = req->elem.in_sg;

include/hw/virtio/virtio-blk.h

@@ -80,14 +80,6 @@ typedef struct MultiReqBuffer {
     bool is_write;
 } MultiReqBuffer;
 
-void virtio_blk_init_request(VirtIOBlock *s, VirtQueue *vq,
-                             VirtIOBlockReq *req);
-void virtio_blk_free_request(VirtIOBlockReq *req);
-
-void virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb);
-
-void virtio_blk_submit_multireq(BlockBackend *blk, MultiReqBuffer *mrb);
-
 void virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq);
 
 #endif