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

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

[Andrew Morton]

The quilt patch titled
     Subject: selftests/mm: skip map_populate on weird filesystems
has been removed from the -mm tree.  Its filename was
     selftests-mm-skip-map_populate-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 map_populate on weird filesystems
Date: Tue, 11 Mar 2025 13:18:18 +0000

It seems that 9pfs does not allow truncating unlinked files, Mark Brown
has noted that NFS may also behave this way.

It doesn't seem quite right to call this a "bug" but it's probably a
special enough case that it makes sense for the test to just SKIP if it
happens.

Link: https://lkml.kernel.org/r/20250311-mm-selftests-v4-7-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/map_populate.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/tools/testing/selftests/mm/map_populate.c~selftests-mm-skip-map_populate-on-weird-filesystems
+++ a/tools/testing/selftests/mm/map_populate.c
@@ -87,6 +87,13 @@ int main(int argc, char **argv)
 	BUG_ON(!ftmp, "tmpfile()");
 
 	ret = ftruncate(fileno(ftmp), MMAP_SZ);
+	if (ret < 0 && errno == ENOENT) {
+		/*
+		 * This probably means tmpfile() made a file on a filesystem
+		 * that doesn't handle temporary files the way we want.
+		 */
+		ksft_exit_skip("ftruncate(fileno(tmpfile())) gave ENOENT, weird filesystem?\n");
+	}
 	BUG_ON(ret, "ftruncate()");
 
 	smap = mmap(0, MMAP_SZ, PROT_READ | PROT_WRITE,
_

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

scripts-gdb-add-lx_per_cpu_ptr.patch