[PATCH v2 02/24] libxl: use LIBXL_DEFINE_DEVICE_LIST for pci devices

[Paul Durrant <paul@xxxxxxx>]

From: Paul Durrant <pdurrant@xxxxxxxxxx>

Remove open coded definition of libxl_device_pci_list().

NOTE: Using the macro also defines libxl_device_pci_list_free() so a prototype
      for it is added. Subsequent patches will make used of it.

Signed-off-by: Paul Durrant <pdurrant@xxxxxxxxxx>
---
Cc: Ian Jackson <iwj@xxxxxxxxxxxxxx>
Cc: Wei Liu <wl@xxxxxxx>
---
 tools/include/libxl.h        |  7 +++++++
 tools/libs/light/libxl_pci.c | 27 ++-------------------------
 2 files changed, 9 insertions(+), 25 deletions(-)

diff --git a/tools/include/libxl.h b/tools/include/libxl.h
index fbe4c81ba511..ee52d3cf7e7e 100644
--- a/tools/include/libxl.h
+++ b/tools/include/libxl.h
@@ -451,6 +451,12 @@
  */
 #define LIBXL_HAVE_CONFIG_PCIS 1
 
+/*
+ * LIBXL_HAVE_DEVICE_PCI_LIST_FREE indicates that the
+ * libxl_device_pci_list_free() function is defined.
+ */
+#define LIBXL_HAVE_DEVICE_PCI_LIST_FREE 1
+
 /*
  * libxl ABI compatibility
  *
@@ -2321,6 +2327,7 @@ int libxl_device_pci_destroy(libxl_ctx *ctx, uint32_t 
domid,
 
 libxl_device_pci *libxl_device_pci_list(libxl_ctx *ctx, uint32_t domid,
                                         int *num);
+void libxl_device_pci_list_free(libxl_device_pci* list, int num);
 
 /*
  * Turns the current process into a backend device service daemon
diff --git a/tools/libs/light/libxl_pci.c b/tools/libs/light/libxl_pci.c
index 2ff1c64a3144..515e74fe5aae 100644
--- a/tools/libs/light/libxl_pci.c
+++ b/tools/libs/light/libxl_pci.c
@@ -2393,31 +2393,6 @@ static int libxl__device_pci_get_num(libxl__gc *gc, 
const char *be_path,
     return rc;
 }
 
-libxl_device_pci *libxl_device_pci_list(libxl_ctx *ctx, uint32_t domid, int 
*num)
-{
-    GC_INIT(ctx);
-    char *be_path;
-    unsigned int n, i;
-    libxl_device_pci *pcis = NULL;
-
-    *num = 0;
-
-    be_path = libxl__domain_device_backend_path(gc, 0, domid, 0,
-                                                LIBXL__DEVICE_KIND_PCI);
-    if (libxl__device_pci_get_num(gc, be_path, &n))
-        goto out;
-
-    pcis = calloc(n, sizeof(libxl_device_pci));
-
-    for (i = 0; i < n; i++)
-        libxl__device_pci_from_xs_be(gc, be_path, i, pcis + i);
-
-    *num = n;
-out:
-    GC_FREE;
-    return pcis;
-}
-
 void libxl__device_pci_destroy_all(libxl__egc *egc, uint32_t domid,
                                    libxl__multidev *multidev)
 {
@@ -2492,6 +2467,8 @@ static int libxl_device_pci_compare(const 
libxl_device_pci *d1,
     return COMPARE_PCI(d1, d2);
 }
 
+LIBXL_DEFINE_DEVICE_LIST(pci)
+
 #define libxl__device_pci_update_devid NULL
 
 DEFINE_DEVICE_TYPE_STRUCT(pci, PCI,
-- 
2.20.1