userfaultfd: selftest: return an error if BOUNCE_VERIFY fails

This will report the error in the exit code, in addition of the fprintf.

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 1089709..174f2fc 100644 (file)
--- a/tools/testing/selftests/vm/userfaultfd.c
+++ b/tools/testing/selftests/vm/userfaultfd.c
@@ -422,7 +422,7 @@ static int userfaultfd_stress(void)
        struct uffdio_register uffdio_register;
        struct uffdio_api uffdio_api;
        unsigned long cpu;
-       int uffd_flags;
+       int uffd_flags, err;
        unsigned long userfaults[nr_cpus];
 
        if (posix_memalign(&area, page_size, nr_pages * page_size)) {
@@ -499,6 +499,7 @@ static int userfaultfd_stress(void)
        pthread_attr_init(&attr);
        pthread_attr_setstacksize(&attr, 16*1024*1024);
 
+       err = 0;
        while (bounces--) {
                unsigned long expected_ioctls;
 
@@ -583,8 +584,9 @@ static int userfaultfd_stress(void)
                                            area_dst + nr * page_size,
                                            sizeof(pthread_mutex_t))) {
                                        fprintf(stderr,
-                                               "error mutex 2 %lu\n",
+                                               "error mutex %lu\n",
                                                nr);
+                                       err = 1;
                                        bounces = 0;
                                }
                                if (*area_count(area_dst, nr) != count_verify[nr]) {
@@ -593,6 +595,7 @@ static int userfaultfd_stress(void)
                                                *area_count(area_src, nr),
                                                count_verify[nr],
                                                nr);
+                                       err = 1;
                                        bounces = 0;
                                }
                        }
@@ -609,7 +612,7 @@ static int userfaultfd_stress(void)
                printf("\n");
        }
 
-       return 0;
+       return err;
 }
 
 int main(int argc, char **argv)