[merged mm-stable] selftests-mm-skip-gup_longterm-tests-on-weird-filesystems.patch removed from -mm tree

[merged mm-stable] selftests-mm-skip-gup_longterm-tests-on-weird-filesystems.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: selftests/mm: skip gup_longterm tests on weird filesystems
has been removed from the -mm tree.  Its filename was
     selftests-mm-skip-gup_longterm-tests-on-weird-filesystems.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Brendan Jackman <jackmanb@google.com>
Subject: selftests/mm: skip gup_longterm tests on weird filesystems
Date: Tue, 11 Mar 2025 13:18:19 +0000

Some filesystems don't support ftruncate()ing unlinked files.  They return
ENOENT.  In that case, skip the test.

Link: https://lkml.kernel.org/r/20250311-mm-selftests-v4-8-dec210a658f5@google.com
Signed-off-by: Brendan Jackman <jackmanb@google.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/mm/gup_longterm.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

--- a/tools/testing/selftests/mm/gup_longterm.c~selftests-mm-skip-gup_longterm-tests-on-weird-filesystems
+++ a/tools/testing/selftests/mm/gup_longterm.c
@@ -96,7 +96,15 @@ static void do_test(int fd, size_t size,
 	int ret;
 
 	if (ftruncate(fd, size)) {
-		ksft_test_result_fail("ftruncate() failed (%s)\n", strerror(errno));
+		if (errno == ENOENT) {
+			/*
+			 * This can happen if the file has been unlinked and the
+			 * filesystem doesn't support truncating unlinked files.
+			 */
+			ksft_test_result_skip("ftruncate() failed with ENOENT\n");
+		} else {
+			ksft_test_result_fail("ftruncate() failed (%s)\n", strerror(errno));
+		}
 		return;
 	}
 
_

Patches currently in -mm which might be from jackmanb@google.com are

scripts-gdb-add-lx_per_cpu_ptr.patch