userfaultfd: selftest: don't error out if pthread_mutex_t isn't identical

On ppc big endian this check fails, the mutex doesn't necessarily need
to be identical for all pages after pthread_mutex_lock/unlock cycles.
The count verification (outside of the pthread_mutex_t structure)
suffices and that is retained.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
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 174f2fc..d77ed41 100644 (file)
--- a/tools/testing/selftests/vm/userfaultfd.c
+++ b/tools/testing/selftests/vm/userfaultfd.c
@@ -580,15 +580,6 @@ static int userfaultfd_stress(void)
                /* verification */
                if (bounces & BOUNCE_VERIFY) {
                        for (nr = 0; nr < nr_pages; nr++) {
-                               if (my_bcmp(area_dst,
-                                           area_dst + nr * page_size,
-                                           sizeof(pthread_mutex_t))) {
-                                       fprintf(stderr,
-                                               "error mutex %lu\n",
-                                               nr);
-                                       err = 1;
-                                       bounces = 0;
-                               }
                                if (*area_count(area_dst, nr) != count_verify[nr]) {
                                        fprintf(stderr,
                                                "error area_count %Lu %Lu %lu\n",