tools/testing/selftests/vm/userfaultfd.c: use swap() to make code cleaner

Fix the following coccicheck REVIEW:

 tools/testing/selftests/vm/userfaultfd.c:1531:21-22:use swap() to make code cleaner

Link: https://lkml.kernel.org/r/20211124031632.35317-1-chi.minghao@zte.com.cn
Signed-off-by: chiminghao <chi.minghao@zte.com.cn>
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c
index 9354a5e0321ce5ba60d6756b8555f726ce9680ed..990f7aecf4a39f7f361542cc33cbdbf2780478ff 100644 (file)
--- a/tools/testing/selftests/vm/userfaultfd.c
+++ b/tools/testing/selftests/vm/userfaultfd.c
@@ -1417,7 +1417,6 @@ static void userfaultfd_pagemap_test(unsigned int test_pgsize)
 static int userfaultfd_stress(void)
 {
        void *area;
-       char *tmp_area;
        unsigned long nr;
        struct uffdio_register uffdio_register;
        struct uffd_stats uffd_stats[nr_cpus];
@@ -1528,13 +1527,9 @@ static int userfaultfd_stress(void)
                                            count_verify[nr], nr);
 
                /* prepare next bounce */
-               tmp_area = area_src;
-               area_src = area_dst;
-               area_dst = tmp_area;
+               swap(area_src, area_dst);
 
-               tmp_area = area_src_alias;
-               area_src_alias = area_dst_alias;
-               area_dst_alias = tmp_area;
+               swap(area_src_alias, area_dst_alias);
 
                uffd_stats_report(uffd_stats, nr_cpus);
        }