[Xen-devel] [PATCH v2 2/3] [GSOC14] Replacing Deprecated Function Calls.

[Dushyant Behl <myselfdushyantbehl@xxxxxxxxx>]

This patch is part of the work done under the gsoc project -
Lazy Restore Using Memory Paging.

This patch replaces the calls to the deprecated function
xc_map_foreign_batch with the calls to xc_map_foreign_bulk
in tools/libxc/xc_mem_paging_ring_setup.c
The function xc_map_foreign_bulk has a cleaner error reporting
interface than xc_map_foreign_batch.

Signed-off-by: Dushyant Behl <myselfdushyantbehl@xxxxxxxxx>
Reviewed-by: Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 tools/libxc/xc_mem_paging_setup.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/tools/libxc/xc_mem_paging_setup.c 
b/tools/libxc/xc_mem_paging_setup.c
index 4e5fe73..679c606 100644
--- a/tools/libxc/xc_mem_paging_setup.c
+++ b/tools/libxc/xc_mem_paging_setup.c
@@ -43,15 +43,15 @@ int xc_mem_paging_ring_setup(xc_interface *xch,
                              uint32_t *evtchn_port,
                              mem_event_back_ring_t *back_ring)
 {
-    int rc;
+    int rc, err;
     uint64_t ring_pfn, mmap_pfn;
 
     /* Map the ring page */
     xc_get_hvm_param(xch, domain_id, HVM_PARAM_PAGING_RING_PFN, &ring_pfn);
     mmap_pfn = ring_pfn;
-    ring_page = xc_map_foreign_batch(xch, domain_id,
-                                        PROT_READ | PROT_WRITE, &mmap_pfn, 1);
-    if ( mmap_pfn & XEN_DOMCTL_PFINFO_XTAB )
+    ring_page = xc_map_foreign_bulk(xch, domain_id,
+                                     PROT_READ | PROT_WRITE, &mmap_pfn, &err, 
1);
+    if ( (err != 0) || (ring_page == NULL) )
     {
         /* Map failed, populate ring page */
         rc = xc_domain_populate_physmap_exact(xch, domain_id,
@@ -63,10 +63,10 @@ int xc_mem_paging_ring_setup(xc_interface *xch,
         }
 
         mmap_pfn = ring_pfn;
-        ring_page = xc_map_foreign_batch(xch, domain_id,
-                                        PROT_READ | PROT_WRITE, &mmap_pfn, 1);
+        ring_page = xc_map_foreign_bulk(xch, domain_id,
+                                        PROT_READ | PROT_WRITE, &mmap_pfn, 
&err, 1);
 
-        if ( mmap_pfn & XEN_DOMCTL_PFINFO_XTAB )
+        if ( (err != 0) || (ring_page == NULL) )
         {
             PERROR("Could not map the ring page\n");
             return -1;
-- 
1.9.1


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