+ userfaultfd-selftest-explicit-failure-if-the-sigbus-test-failed.patch added to -mm tree

+ userfaultfd-selftest-explicit-failure-if-the-sigbus-test-failed.patch added to -mm tree

[akpm]

The patch titled
     Subject: userfaultfd: selftest: explicit failure if the SIGBUS test failed
has been added to the -mm tree.  Its filename is
     userfaultfd-selftest-explicit-failure-if-the-sigbus-test-failed.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/userfaultfd-selftest-explicit-failure-if-the-sigbus-test-failed.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/userfaultfd-selftest-explicit-failure-if-the-sigbus-test-failed.patch

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The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Andrea Arcangeli <aarcange@redhat.com>
Subject: userfaultfd: selftest: explicit failure if the SIGBUS test failed

Showing zero in the output isn't very self explanatory as a successful
result. Show a more explicit error output if the test fails.

Link: http://lkml.kernel.org/r/20170802165145.22628-4-aarcange@redhat.com
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Alexey Perevalov <a.perevalov@samsung.com>
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/vm/userfaultfd.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff -puN tools/testing/selftests/vm/userfaultfd.c~userfaultfd-selftest-explicit-failure-if-the-sigbus-test-failed tools/testing/selftests/vm/userfaultfd.c
--- a/tools/testing/selftests/vm/userfaultfd.c~userfaultfd-selftest-explicit-failure-if-the-sigbus-test-failed
+++ a/tools/testing/selftests/vm/userfaultfd.c
@@ -986,7 +986,9 @@ static int userfaultfd_sig_test(void)
 		return 1;
 
 	printf("done.\n");
-	printf(" Signal test userfaults: %ld\n", userfaults);
+	if (userfaults)
+		fprintf(stderr, "Signal test failed, userfaults: %ld\n",
+			userfaults);
 	close(uffd);
 	return userfaults != 0;
 }
_

Patches currently in -mm which might be from aarcange@redhat.com are

userfaultfd-hugetlbfs-remove-superfluous-page-unlock-in-vm_shared-case.patch
userfaultfd-selftest-exercise-uffdio_copy-zeropage-eexist.patch
userfaultfd-selftest-explicit-failure-if-the-sigbus-test-failed.patch
userfaultfd-call-userfaultfd_unmap_prep-only-if-__split_vma-succeeds.patch
userfaultfd-provide-pid-in-userfault-msg-add-feat-union.patch