Merge tag 'mm-hotfixes-stable-2023-11-17-14-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "Thirteen hotfixes. Seven are cc:stable and the remainder pertain to
  post-6.6 issues or aren't considered suitable for backporting"

* tag 'mm-hotfixes-stable-2023-11-17-14-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  mm: more ptep_get() conversion
  parisc: fix mmap_base calculation when stack grows upwards
  mm/damon/core.c: avoid unintentional filtering out of schemes
  mm: kmem: drop __GFP_NOFAIL when allocating objcg vectors
  mm/damon/sysfs-schemes: handle tried region directory allocation failure
  mm/damon/sysfs-schemes: handle tried regions sysfs directory allocation failure
  mm/damon/sysfs: check error from damon_sysfs_update_target()
  mm: fix for negative counter: nr_file_hugepages
  selftests/mm: add hugetlb_fault_after_madv to .gitignore
  selftests/mm: restore number of hugepages
  selftests: mm: fix some build warnings
  selftests: mm: skip whole test instead of failure
  mm/damon/sysfs: eliminate potential uninitialized variable warning

3 files changed, 16 insertions, 11 deletions

diff --git a/tools/testing/selftests/mm/.gitignore b/tools/testing/selftests/mm/.gitignore
index cc920c79ff1c..4ff10ea61461 100644
--- a/tools/testing/selftests/mm/.gitignore
+++ b/tools/testing/selftests/mm/.gitignore
@@ -45,3 +45,4 @@ mdwe_test
 gup_longterm
 mkdirty
 va_high_addr_switch
+hugetlb_fault_after_madv
diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
index 0161fb49fc6e..befab43719ba 100644
--- a/tools/testing/selftests/mm/pagemap_ioctl.c
+++ b/tools/testing/selftests/mm/pagemap_ioctl.c
@@ -94,19 +94,19 @@ int init_uffd(void)
 
 	uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK | UFFD_USER_MODE_ONLY);
 	if (uffd == -1)
-		ksft_exit_fail_msg("uffd syscall failed\n");
+		return uffd;
 
 	uffdio_api.api = UFFD_API;
 	uffdio_api.features = UFFD_FEATURE_WP_UNPOPULATED | UFFD_FEATURE_WP_ASYNC |
 			      UFFD_FEATURE_WP_HUGETLBFS_SHMEM;
 	if (ioctl(uffd, UFFDIO_API, &uffdio_api))
-		ksft_exit_fail_msg("UFFDIO_API\n");
+		return -1;
 
 	if (!(uffdio_api.api & UFFDIO_REGISTER_MODE_WP) ||
 	    !(uffdio_api.features & UFFD_FEATURE_WP_UNPOPULATED) ||
 	    !(uffdio_api.features & UFFD_FEATURE_WP_ASYNC) ||
 	    !(uffdio_api.features & UFFD_FEATURE_WP_HUGETLBFS_SHMEM))
-		ksft_exit_fail_msg("UFFDIO_API error %llu\n", uffdio_api.api);
+		return -1;
 
 	return 0;
 }
@@ -1151,7 +1151,7 @@ int sanity_tests(void)
 	/* 9. Memory mapped file */
 	fd = open(__FILE__, O_RDONLY);
 	if (fd < 0)
-		ksft_exit_fail_msg("%s Memory mapped file\n");
+		ksft_exit_fail_msg("%s Memory mapped file\n", __func__);
 
 	ret = stat(__FILE__, &sbuf);
 	if (ret < 0)
@@ -1159,7 +1159,7 @@ int sanity_tests(void)
 
 	fmem = mmap(NULL, sbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
 	if (fmem == MAP_FAILED)
-		ksft_exit_fail_msg("error nomem %ld %s\n", errno, strerror(errno));
+		ksft_exit_fail_msg("error nomem %d %s\n", errno, strerror(errno));
 
 	tmp_buf = malloc(sbuf.st_size);
 	memcpy(tmp_buf, fmem, sbuf.st_size);
@@ -1189,7 +1189,7 @@ int sanity_tests(void)
 
 	fmem = mmap(NULL, buf_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
 	if (fmem == MAP_FAILED)
-		ksft_exit_fail_msg("error nomem %ld %s\n", errno, strerror(errno));
+		ksft_exit_fail_msg("error nomem %d %s\n", errno, strerror(errno));
 
 	wp_init(fmem, buf_size);
 	wp_addr_range(fmem, buf_size);
@@ -1479,6 +1479,10 @@ int main(void)
 	struct stat sbuf;
 
 	ksft_print_header();
+
+	if (init_uffd())
+		return ksft_exit_pass();
+
 	ksft_set_plan(115);
 
 	page_size = getpagesize();
@@ -1488,9 +1492,6 @@ int main(void)
 	if (pagemap_fd < 0)
 		return -EINVAL;
 
-	if (init_uffd())
-		ksft_exit_fail_msg("uffd init failed\n");
-
 	/* 1. Sanity testing */
 	sanity_tests_sd();
 
@@ -1595,7 +1596,7 @@ int main(void)
 
 	fmem = mmap(NULL, sbuf.st_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
 	if (fmem == MAP_FAILED)
-		ksft_exit_fail_msg("error nomem %ld %s\n", errno, strerror(errno));
+		ksft_exit_fail_msg("error nomem %d %s\n", errno, strerror(errno));
 
 	wp_init(fmem, sbuf.st_size);
 	wp_addr_range(fmem, sbuf.st_size);
@@ -1623,7 +1624,7 @@ int main(void)
 
 	fmem = mmap(NULL, buf_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
 	if (fmem == MAP_FAILED)
-		ksft_exit_fail_msg("error nomem %ld %s\n", errno, strerror(errno));
+		ksft_exit_fail_msg("error nomem %d %s\n", errno, strerror(errno));
 
 	wp_init(fmem, buf_size);
 	wp_addr_range(fmem, buf_size);
diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh
index cc16f6ca8533..00757445278e 100755
--- a/tools/testing/selftests/mm/run_vmtests.sh
+++ b/tools/testing/selftests/mm/run_vmtests.sh
@@ -223,9 +223,12 @@ CATEGORY="hugetlb" run_test ./hugepage-mremap
 CATEGORY="hugetlb" run_test ./hugepage-vmemmap
 CATEGORY="hugetlb" run_test ./hugetlb-madvise
 
+nr_hugepages_tmp=$(cat /proc/sys/vm/nr_hugepages)
 # For this test, we need one and just one huge page
 echo 1 > /proc/sys/vm/nr_hugepages
 CATEGORY="hugetlb" run_test ./hugetlb_fault_after_madv
+# Restore the previous number of huge pages, since further tests rely on it
+echo "$nr_hugepages_tmp" > /proc/sys/vm/nr_hugepages
 
 if test_selected "hugetlb"; then
 	echo "NOTE: These hugetlb tests provide minimal coverage.  Use"