eliminate direct assignments of CPU masks

Use cpumask_copy() instead of direct variable assignments for copying
CPU masks. While direct assignments are not a problem when both sides
are variables actually defined as cpumask_t (except for possibly
copying *much* more than would actually need to be copied), they must
not happen when the original variable is of type cpumask_var_t (which
may have lass space allocated to it than a full cpumask_t). Eliminate
as many of such assignments as possible (in several cases it's even
possible to collapse two operations [copy then clear one bit] into one
[cpumask_andnot()]), and thus set the way for reducing the allocation
size in alloc_cpumask_var().

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/xen/arch/x86/numa.c b/xen/arch/x86/numa.c
index 61b5904a2c..83e9ee38bc 100644
--- a/xen/arch/x86/numa.c
+++ b/xen/arch/x86/numa.c
@@ -282,7 +282,7 @@ void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
 	node_set_online(0);
 	for (i = 0; i < nr_cpu_ids; i++)
 		numa_set_node(i, 0);
-	node_to_cpumask[0] = cpumask_of_cpu(0);
+	cpumask_copy(&node_to_cpumask[0], cpumask_of(0));
 	setup_node_bootmem(0, (u64)start_pfn << PAGE_SHIFT, (u64)end_pfn << PAGE_SHIFT);
 }