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@xxxxxxxxxx>
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@xxxxxxxxxx
Signed-off-by: Brendan Jackman <jackmanb@xxxxxxxxxx>
Cc: Dev Jain <dev.jain@xxxxxxx>
Cc: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
Cc: Mateusz Guzik <mjguzik@xxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxx are
scripts-gdb-add-lx_per_cpu_ptr.patch
