+ selftests-vm-use-memfd-for-hugetlb-madvise-test.patch added to mm-unstable branch

[Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>]

The patch titled
     Subject: selftests/vm: use memfd for hugetlb-madvise test
has been added to the -mm mm-unstable branch.  Its filename is
     selftests-vm-use-memfd-for-hugetlb-madvise-test.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-vm-use-memfd-for-hugetlb-madvise-test.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Peter Xu <peterx@xxxxxxxxxx>
Subject: selftests/vm: use memfd for hugetlb-madvise test
Date: Fri, 14 Oct 2022 10:39:19 -0400

For dropping the hugetlb mountpoint in run_vmtests.sh.  Since no parameter
is needed, drop USAGE too.

Link: https://lkml.kernel.org/r/20221014143921.93887-3-peterx@xxxxxxxxxx
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
Cc: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 tools/testing/selftests/vm/hugetlb-madvise.c |   12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

--- a/tools/testing/selftests/vm/hugetlb-madvise.c~selftests-vm-use-memfd-for-hugetlb-madvise-test
+++ a/tools/testing/selftests/vm/hugetlb-madvise.c
@@ -12,6 +12,7 @@
  * directory.
  */
 
+#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
@@ -19,7 +20,6 @@
 #define __USE_GNU
 #include <fcntl.h>
 
-#define USAGE	"USAGE: %s <hugepagefile_name>\n"
 #define MIN_FREE_PAGES	20
 #define NR_HUGE_PAGES	10	/* common number of pages to map/allocate */
 
@@ -103,11 +103,6 @@ int main(int argc, char **argv)
 	int fd;
 	int ret;
 
-	if (argc != 2) {
-		printf(USAGE, argv[0]);
-		exit(1);
-	}
-
 	huge_page_size = default_huge_page_size();
 	if (!huge_page_size) {
 		printf("Unable to determine huge page size, exiting!\n");
@@ -125,9 +120,9 @@ int main(int argc, char **argv)
 		exit(1);
 	}
 
-	fd = open(argv[1], O_CREAT | O_RDWR, 0755);
+	fd = memfd_create(argv[0], MFD_HUGETLB);
 	if (fd < 0) {
-		perror("Open failed");
+		perror("memfd_create() failed");
 		exit(1);
 	}
 
@@ -406,6 +401,5 @@ int main(int argc, char **argv)
 	(void)munmap(addr2, NR_HUGE_PAGES * huge_page_size);
 
 	close(fd);
-	unlink(argv[1]);
 	return 0;
 }
_

Patches currently in -mm which might be from peterx@xxxxxxxxxx are

selftests-vm-use-memfd-for-uffd-hugetlb-tests.patch
selftests-vm-use-memfd-for-hugetlb-madvise-test.patch
selftests-vm-use-memfd-for-hugepage-mremap-test.patch
selftests-vm-drop-mnt-point-for-hugetlb-in-run_vmtestssh.patch