[merged mm-stable] selftests-vm-use-memfd-for-hugepage-mremap-test.patch removed from -mm tree

[merged mm-stable] selftests-vm-use-memfd-for-hugepage-mremap-test.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: selftests/vm: use memfd for hugepage-mremap test
has been removed from the -mm tree.  Its filename was
     selftests-vm-use-memfd-for-hugepage-mremap-test.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: Peter Xu <peterx@redhat.com>
Subject: selftests/vm: use memfd for hugepage-mremap test
Date: Fri, 14 Oct 2022 10:40:13 -0400

For dropping the hugetlb mountpoint in run_vmtests.sh.  Cleaned it up a
little bit around the changed codes.

Link: https://lkml.kernel.org/r/20221014144013.94027-1-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/vm/hugepage-mremap.c |   21 +++++++----------
 1 file changed, 9 insertions(+), 12 deletions(-)

--- a/tools/testing/selftests/vm/hugepage-mremap.c~selftests-vm-use-memfd-for-hugepage-mremap-test
+++ a/tools/testing/selftests/vm/hugepage-mremap.c
@@ -22,6 +22,7 @@
 #include <sys/syscall.h> /* Definition of SYS_* constants */
 #include <linux/userfaultfd.h>
 #include <sys/ioctl.h>
+#include <string.h>
 
 #define DEFAULT_LENGTH_MB 10UL
 #define MB_TO_BYTES(x) (x * 1024 * 1024)
@@ -108,26 +109,23 @@ static void register_region_with_uffd(ch
 int main(int argc, char *argv[])
 {
 	size_t length = 0;
+	int ret = 0, fd;
 
-	if (argc != 2 && argc != 3) {
-		printf("Usage: %s [length_in_MB] <hugetlb_file>\n", argv[0]);
+	if (argc >= 2 && !strcmp(argv[1], "-h")) {
+		printf("Usage: %s [length_in_MB]\n", argv[0]);
 		exit(1);
 	}
 
 	/* Read memory length as the first arg if valid, otherwise fallback to
 	 * the default length.
 	 */
-	if (argc == 3)
-		length = argc > 2 ? (size_t)atoi(argv[1]) : 0UL;
+	if (argc >= 2)
+		length = (size_t)atoi(argv[1]);
+	else
+		length = DEFAULT_LENGTH_MB;
 
-	length = length > 0 ? length : DEFAULT_LENGTH_MB;
 	length = MB_TO_BYTES(length);
-
-	int ret = 0;
-
-	/* last arg is the hugetlb file name */
-	int fd = open(argv[argc-1], O_CREAT | O_RDWR, 0755);
-
+	fd = memfd_create(argv[0], MFD_HUGETLB);
 	if (fd < 0) {
 		perror("Open failed");
 		exit(1);
@@ -185,7 +183,6 @@ int main(int argc, char *argv[])
 	}
 
 	close(fd);
-	unlink(argv[argc-1]);
 
 	return ret;
 }
_

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

mm-always-compile-in-pte-markers.patch
mm-use-pte-markers-for-swap-errors.patch