libxl: allow to allocate cpumap with specific size

Currently, libxl_cpumap_alloc()allocate the cpumap with size of number
of physical cpus. In some place, we may want to allocate specific size
of cpumap.  This patch allow to pass a argument to specific the size
that you want to allocate. If pass 0, it means the size is equal to
number of physical cpus.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index 67cd207379..08e5536c0c 100644
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -205,8 +205,8 @@ int libxl__domain_build_info_setdefault(libxl__gc *gc,
         b_info->cur_vcpus = 1;
 
     if (!b_info->cpumap.size) {
-        if (libxl_cpumap_alloc(CTX, &b_info->cpumap))
-            return ERROR_NOMEM;
+        if (libxl_cpumap_alloc(CTX, &b_info->cpumap, 0))
+            return ERROR_FAIL;
         libxl_cpumap_set_any(&b_info->cpumap);
     }