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* + userfaultfd-selftests-fix-calculation-of-expected-ioctls.patch added to -mm tree
@ 2021-09-21 17:40 akpm
  0 siblings, 0 replies; 2+ messages in thread
From: akpm @ 2021-09-21 17:40 UTC (permalink / raw)
  To: aarcange, axelrasmussen, mm-commits, peterx, shuah


The patch titled
     Subject: userfaultfd/selftests: fix calculation of expected ioctls
has been added to the -mm tree.  Its filename is
     userfaultfd-selftests-fix-calculation-of-expected-ioctls.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/userfaultfd-selftests-fix-calculation-of-expected-ioctls.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/userfaultfd-selftests-fix-calculation-of-expected-ioctls.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Axel Rasmussen <axelrasmussen@google.com>
Subject: userfaultfd/selftests: fix calculation of expected ioctls

Currently, the list of expected ioctls is stored in uffd_test_ops.  This
design comes with the implicit assumption that the set of expected ioctls
is a function of the memory type (anon, shmem, or hugetlb).

However, this is not the case. For example:

- UFFDIO_WRITEPROTECT is supported for anon in general, *but not on
  aarch64* (which lacks CONFIG_HAVE_ARCH_USERFAULTFD_WP).
- UFFDIO_WRITEPROTECT is supported for anon, but only if one registers
  the region with UFFD_REGISTER_MODE_WP.
- We want to test (and expect) UFFDIO_CONTINUE, but only for *shared*
  hugetlb, not private.

So, instead, remove the set of expected ioctls from this structure. 
Define a new function which can compute the correct set by examining the
memory type, the userfaultfd registration mode(s), whether map_shared is
set, and what set of features the kernel reports as supported (from
UFFDIO_API).

In addition to being more correct, this improves code re-use - less
boilerplate in each test trying to perform this assertion.

Link: https://lkml.kernel.org/r/20210921163323.944352-2-axelrasmussen@google.com
Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/vm/userfaultfd.c |  103 +++++++++++----------
 1 file changed, 56 insertions(+), 47 deletions(-)

--- a/tools/testing/selftests/vm/userfaultfd.c~userfaultfd-selftests-fix-calculation-of-expected-ioctls
+++ a/tools/testing/selftests/vm/userfaultfd.c
@@ -304,37 +304,24 @@ static void shmem_alias_mapping(__u64 *s
 }
 
 struct uffd_test_ops {
-	unsigned long expected_ioctls;
 	void (*allocate_area)(void **alloc_area);
 	void (*release_pages)(char *rel_area);
 	void (*alias_mapping)(__u64 *start, size_t len, unsigned long offset);
 };
 
-#define SHMEM_EXPECTED_IOCTLS		((1 << _UFFDIO_WAKE) | \
-					 (1 << _UFFDIO_COPY) | \
-					 (1 << _UFFDIO_ZEROPAGE))
-
-#define ANON_EXPECTED_IOCTLS		((1 << _UFFDIO_WAKE) | \
-					 (1 << _UFFDIO_COPY) | \
-					 (1 << _UFFDIO_ZEROPAGE) | \
-					 (1 << _UFFDIO_WRITEPROTECT))
-
 static struct uffd_test_ops anon_uffd_test_ops = {
-	.expected_ioctls = ANON_EXPECTED_IOCTLS,
 	.allocate_area	= anon_allocate_area,
 	.release_pages	= anon_release_pages,
 	.alias_mapping = noop_alias_mapping,
 };
 
 static struct uffd_test_ops shmem_uffd_test_ops = {
-	.expected_ioctls = SHMEM_EXPECTED_IOCTLS,
 	.allocate_area	= shmem_allocate_area,
 	.release_pages	= shmem_release_pages,
 	.alias_mapping = shmem_alias_mapping,
 };
 
 static struct uffd_test_ops hugetlb_uffd_test_ops = {
-	.expected_ioctls = UFFD_API_RANGE_IOCTLS_BASIC & ~(1 << _UFFDIO_CONTINUE),
 	.allocate_area	= hugetlb_allocate_area,
 	.release_pages	= hugetlb_release_pages,
 	.alias_mapping = hugetlb_alias_mapping,
@@ -368,6 +355,47 @@ static inline bool uffd_wp_supported(voi
 		(uffd_features & UFFD_FEATURE_PAGEFAULT_FLAG_WP);
 }
 
+static inline uint64_t uffd_minor_feature(void)
+{
+	if (test_type == TEST_HUGETLB && map_shared)
+		return UFFD_FEATURE_MINOR_HUGETLBFS;
+	else if (test_type == TEST_SHMEM)
+		return UFFD_FEATURE_MINOR_SHMEM;
+	else
+		return 0;
+}
+
+static inline bool uffd_minor_supported(void)
+{
+	return uffd_features & uffd_minor_feature();
+}
+
+static unsigned long get_expected_ioctls(uint64_t mode)
+{
+	unsigned long ioctls = UFFD_API_RANGE_IOCTLS;
+
+	if (test_type == TEST_HUGETLB)
+		ioctls &= ~(1 << _UFFDIO_ZEROPAGE);
+
+	if (!((mode & UFFDIO_REGISTER_MODE_WP) && uffd_wp_supported()))
+		ioctls &= ~(1 << _UFFDIO_WRITEPROTECT);
+
+	if (!((mode & UFFDIO_REGISTER_MODE_MINOR) && uffd_minor_supported()))
+		ioctls &= ~(1 << _UFFDIO_CONTINUE);
+
+	return ioctls;
+}
+
+static inline void assert_expected_ioctls_present(uint64_t mode, uint64_t ioctls)
+{
+	uint64_t expected = get_expected_ioctls(mode);
+	uint64_t actual = ioctls & expected;
+
+	if (actual != expected)
+		err("missing ioctl(s); expected: %"PRIx64" actual: %"PRIx64,
+		    expected, actual);
+}
+
 static inline void munmap_area(void **area)
 {
 	if (*area)
@@ -1012,11 +1040,9 @@ static int __uffdio_zeropage(int ufd, un
 {
 	struct uffdio_zeropage uffdio_zeropage;
 	int ret;
-	unsigned long has_zeropage;
+	bool has_zeropage = get_expected_ioctls(0) & (1 << _UFFDIO_ZEROPAGE);
 	__s64 res;
 
-	has_zeropage = uffd_test_ops->expected_ioctls & (1 << _UFFDIO_ZEROPAGE);
-
 	if (offset >= nr_pages * page_size)
 		err("unexpected offset %lu", offset);
 	uffdio_zeropage.range.start = (unsigned long) area_dst + offset;
@@ -1056,7 +1082,6 @@ static int uffdio_zeropage(int ufd, unsi
 static int userfaultfd_zeropage_test(void)
 {
 	struct uffdio_register uffdio_register;
-	unsigned long expected_ioctls;
 
 	printf("testing UFFDIO_ZEROPAGE: ");
 	fflush(stdout);
@@ -1071,9 +1096,8 @@ static int userfaultfd_zeropage_test(voi
 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
 		err("register failure");
 
-	expected_ioctls = uffd_test_ops->expected_ioctls;
-	if ((uffdio_register.ioctls & expected_ioctls) != expected_ioctls)
-		err("unexpected missing ioctl for anon memory");
+	assert_expected_ioctls_present(
+		uffdio_register.mode, uffdio_register.ioctls);
 
 	if (uffdio_zeropage(uffd, 0))
 		if (my_bcmp(area_dst, zeropage, page_size))
@@ -1086,7 +1110,6 @@ static int userfaultfd_zeropage_test(voi
 static int userfaultfd_events_test(void)
 {
 	struct uffdio_register uffdio_register;
-	unsigned long expected_ioctls;
 	pthread_t uffd_mon;
 	int err;
 	pid_t pid;
@@ -1109,9 +1132,8 @@ static int userfaultfd_events_test(void)
 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
 		err("register failure");
 
-	expected_ioctls = uffd_test_ops->expected_ioctls;
-	if ((uffdio_register.ioctls & expected_ioctls) != expected_ioctls)
-		err("unexpected missing ioctl for anon memory");
+	assert_expected_ioctls_present(
+		uffdio_register.mode, uffdio_register.ioctls);
 
 	if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &stats))
 		err("uffd_poll_thread create");
@@ -1139,7 +1161,6 @@ static int userfaultfd_events_test(void)
 static int userfaultfd_sig_test(void)
 {
 	struct uffdio_register uffdio_register;
-	unsigned long expected_ioctls;
 	unsigned long userfaults;
 	pthread_t uffd_mon;
 	int err;
@@ -1163,9 +1184,8 @@ static int userfaultfd_sig_test(void)
 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
 		err("register failure");
 
-	expected_ioctls = uffd_test_ops->expected_ioctls;
-	if ((uffdio_register.ioctls & expected_ioctls) != expected_ioctls)
-		err("unexpected missing ioctl for anon memory");
+	assert_expected_ioctls_present(
+		uffdio_register.mode, uffdio_register.ioctls);
 
 	if (faulting_process(1))
 		err("faulting process failed");
@@ -1200,30 +1220,25 @@ static int userfaultfd_sig_test(void)
 static int userfaultfd_minor_test(void)
 {
 	struct uffdio_register uffdio_register;
-	unsigned long expected_ioctls;
 	unsigned long p;
 	pthread_t uffd_mon;
 	uint8_t expected_byte;
 	void *expected_page;
 	char c;
 	struct uffd_stats stats = { 0 };
-	uint64_t features;
+	uint64_t features = uffd_minor_feature();
 
 	printf("testing minor faults: ");
 	fflush(stdout);
 
-	if (test_type == TEST_HUGETLB && map_shared)
-		features = UFFD_FEATURE_MINOR_HUGETLBFS;
-	else if (test_type == TEST_SHMEM)
-		features = UFFD_FEATURE_MINOR_SHMEM;
-	else {
+	if (!features) {
 		printf("skipping test due to unsupported memory type\n");
+		fflush(stdout);
 		return 0;
 	}
 
 	uffd_test_ctx_init(features);
-	/* If kernel reports required features aren't supported, skip test. */
-	if ((uffd_features & features) != features) {
+	if (!uffd_minor_supported()) {
 		printf("skipping test due to lack of feature support\n");
 		fflush(stdout);
 		return 0;
@@ -1235,10 +1250,8 @@ static int userfaultfd_minor_test(void)
 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
 		err("register failure");
 
-	expected_ioctls = uffd_test_ops->expected_ioctls;
-	expected_ioctls |= 1 << _UFFDIO_CONTINUE;
-	if ((uffdio_register.ioctls & expected_ioctls) != expected_ioctls)
-		err("unexpected missing ioctl(s)");
+	assert_expected_ioctls_present(
+		uffdio_register.mode, uffdio_register.ioctls);
 
 	/*
 	 * After registering with UFFD, populate the non-UFFD-registered side of
@@ -1436,8 +1449,6 @@ static int userfaultfd_stress(void)
 	pthread_attr_setstacksize(&attr, 16*1024*1024);
 
 	while (bounces--) {
-		unsigned long expected_ioctls;
-
 		printf("bounces: %d, mode:", bounces);
 		if (bounces & BOUNCE_RANDOM)
 			printf(" rnd");
@@ -1465,10 +1476,8 @@ static int userfaultfd_stress(void)
 			uffdio_register.mode |= UFFDIO_REGISTER_MODE_WP;
 		if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
 			err("register failure");
-		expected_ioctls = uffd_test_ops->expected_ioctls;
-		if ((uffdio_register.ioctls & expected_ioctls) !=
-		    expected_ioctls)
-			err("unexpected missing ioctl for anon memory");
+		assert_expected_ioctls_present(
+			uffdio_register.mode, uffdio_register.ioctls);
 
 		if (area_dst_alias) {
 			uffdio_register.range.start = (unsigned long)
_

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

userfaultfd-selftests-fix-feature-support-detection.patch
userfaultfd-selftests-fix-calculation-of-expected-ioctls.patch
userfaultfd-selftests-dont-rely-on-gnu-extensions-for-random-numbers.patch


^ permalink raw reply	[flat|nested] 2+ messages in thread
* + userfaultfd-selftests-fix-calculation-of-expected-ioctls.patch added to -mm tree
@ 2021-10-01 23:58 akpm
  0 siblings, 0 replies; 2+ messages in thread
From: akpm @ 2021-10-01 23:58 UTC (permalink / raw)
  To: axelrasmussen, mm-commits, peterx, shuah


The patch titled
     Subject: userfaultfd/selftests: fix calculation of expected ioctls
has been added to the -mm tree.  Its filename is
     userfaultfd-selftests-fix-calculation-of-expected-ioctls.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/userfaultfd-selftests-fix-calculation-of-expected-ioctls.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/userfaultfd-selftests-fix-calculation-of-expected-ioctls.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Axel Rasmussen <axelrasmussen@google.com>
Subject: userfaultfd/selftests: fix calculation of expected ioctls

Today, we assert that the ioctls the kernel reports as supported for a
registration match a precomputed list.  We decide which ioctls are
supported by examining the memory type.  Then, in several locations we
"fix up" this list by adding or removing things this initial decision got
wrong.

What ioctls the kernel reports is actually a function of several things:
- The memory type
- Kernel feature support (e.g., no writeprotect on aarch64)
- The registration type (e.g., CONTINUE only supported for MINOR mode)

So, we can't fully compute this at the start, in set_test_type.  It varies
per test, depending on what registration mode(s) those tests use.

Instead, introduce a new function which computes the correct list.  This
centralizes the add/remove of ioctls depending on these function inputs in
one place, so we don't have to repeat ourselves in various tests.

Not only is the resulting code a bit shorter, but it fixes a real bug in
the existing code: previously, we would incorrectly require the
writeprotect ioctl to be present on aarch64, where it isn't actually
supported.

Link: https://lkml.kernel.org/r/20210930212309.4001967-4-axelrasmussen@google.com
Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/vm/userfaultfd.c |   77 ++++++++++-----------
 1 file changed, 38 insertions(+), 39 deletions(-)

--- a/tools/testing/selftests/vm/userfaultfd.c~userfaultfd-selftests-fix-calculation-of-expected-ioctls
+++ a/tools/testing/selftests/vm/userfaultfd.c
@@ -308,37 +308,24 @@ static void shmem_alias_mapping(__u64 *s
 }
 
 struct uffd_test_ops {
-	unsigned long expected_ioctls;
 	void (*allocate_area)(void **alloc_area);
 	void (*release_pages)(char *rel_area);
 	void (*alias_mapping)(__u64 *start, size_t len, unsigned long offset);
 };
 
-#define SHMEM_EXPECTED_IOCTLS		((1 << _UFFDIO_WAKE) | \
-					 (1 << _UFFDIO_COPY) | \
-					 (1 << _UFFDIO_ZEROPAGE))
-
-#define ANON_EXPECTED_IOCTLS		((1 << _UFFDIO_WAKE) | \
-					 (1 << _UFFDIO_COPY) | \
-					 (1 << _UFFDIO_ZEROPAGE) | \
-					 (1 << _UFFDIO_WRITEPROTECT))
-
 static struct uffd_test_ops anon_uffd_test_ops = {
-	.expected_ioctls = ANON_EXPECTED_IOCTLS,
 	.allocate_area	= anon_allocate_area,
 	.release_pages	= anon_release_pages,
 	.alias_mapping = noop_alias_mapping,
 };
 
 static struct uffd_test_ops shmem_uffd_test_ops = {
-	.expected_ioctls = SHMEM_EXPECTED_IOCTLS,
 	.allocate_area	= shmem_allocate_area,
 	.release_pages	= shmem_release_pages,
 	.alias_mapping = shmem_alias_mapping,
 };
 
 static struct uffd_test_ops hugetlb_uffd_test_ops = {
-	.expected_ioctls = UFFD_API_RANGE_IOCTLS_BASIC & ~(1 << _UFFDIO_CONTINUE),
 	.allocate_area	= hugetlb_allocate_area,
 	.release_pages	= hugetlb_release_pages,
 	.alias_mapping = hugetlb_alias_mapping,
@@ -356,6 +343,33 @@ static inline uint64_t uffd_minor_featur
 		return 0;
 }
 
+static uint64_t get_expected_ioctls(uint64_t mode)
+{
+	uint64_t ioctls = UFFD_API_RANGE_IOCTLS;
+
+	if (test_type == TEST_HUGETLB)
+		ioctls &= ~(1 << _UFFDIO_ZEROPAGE);
+
+	if (!((mode & UFFDIO_REGISTER_MODE_WP) && test_uffdio_wp))
+		ioctls &= ~(1 << _UFFDIO_WRITEPROTECT);
+
+	if (!((mode & UFFDIO_REGISTER_MODE_MINOR) && test_uffdio_minor))
+		ioctls &= ~(1 << _UFFDIO_CONTINUE);
+
+	return ioctls;
+}
+
+static void assert_expected_ioctls_present(uint64_t mode, uint64_t ioctls)
+{
+	uint64_t expected = get_expected_ioctls(mode);
+	uint64_t actual = ioctls & expected;
+
+	if (actual != expected) {
+		err("missing ioctl(s): expected %"PRIx64" actual: %"PRIx64,
+		    expected, actual);
+	}
+}
+
 static void userfaultfd_open(uint64_t *features)
 {
 	struct uffdio_api uffdio_api;
@@ -1017,11 +1031,9 @@ static int __uffdio_zeropage(int ufd, un
 {
 	struct uffdio_zeropage uffdio_zeropage;
 	int ret;
-	unsigned long has_zeropage;
+	bool has_zeropage = get_expected_ioctls(0) & (1 << _UFFDIO_ZEROPAGE);
 	__s64 res;
 
-	has_zeropage = uffd_test_ops->expected_ioctls & (1 << _UFFDIO_ZEROPAGE);
-
 	if (offset >= nr_pages * page_size)
 		err("unexpected offset %lu", offset);
 	uffdio_zeropage.range.start = (unsigned long) area_dst + offset;
@@ -1061,7 +1073,6 @@ static int uffdio_zeropage(int ufd, unsi
 static int userfaultfd_zeropage_test(void)
 {
 	struct uffdio_register uffdio_register;
-	unsigned long expected_ioctls;
 
 	printf("testing UFFDIO_ZEROPAGE: ");
 	fflush(stdout);
@@ -1076,9 +1087,8 @@ static int userfaultfd_zeropage_test(voi
 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
 		err("register failure");
 
-	expected_ioctls = uffd_test_ops->expected_ioctls;
-	if ((uffdio_register.ioctls & expected_ioctls) != expected_ioctls)
-		err("unexpected missing ioctl for anon memory");
+	assert_expected_ioctls_present(
+		uffdio_register.mode, uffdio_register.ioctls);
 
 	if (uffdio_zeropage(uffd, 0))
 		if (my_bcmp(area_dst, zeropage, page_size))
@@ -1091,7 +1101,6 @@ static int userfaultfd_zeropage_test(voi
 static int userfaultfd_events_test(void)
 {
 	struct uffdio_register uffdio_register;
-	unsigned long expected_ioctls;
 	pthread_t uffd_mon;
 	int err, features;
 	pid_t pid;
@@ -1115,9 +1124,8 @@ static int userfaultfd_events_test(void)
 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
 		err("register failure");
 
-	expected_ioctls = uffd_test_ops->expected_ioctls;
-	if ((uffdio_register.ioctls & expected_ioctls) != expected_ioctls)
-		err("unexpected missing ioctl for anon memory");
+	assert_expected_ioctls_present(
+		uffdio_register.mode, uffdio_register.ioctls);
 
 	if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &stats))
 		err("uffd_poll_thread create");
@@ -1145,7 +1153,6 @@ static int userfaultfd_events_test(void)
 static int userfaultfd_sig_test(void)
 {
 	struct uffdio_register uffdio_register;
-	unsigned long expected_ioctls;
 	unsigned long userfaults;
 	pthread_t uffd_mon;
 	int err, features;
@@ -1169,9 +1176,8 @@ static int userfaultfd_sig_test(void)
 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
 		err("register failure");
 
-	expected_ioctls = uffd_test_ops->expected_ioctls;
-	if ((uffdio_register.ioctls & expected_ioctls) != expected_ioctls)
-		err("unexpected missing ioctl for anon memory");
+	assert_expected_ioctls_present(
+		uffdio_register.mode, uffdio_register.ioctls);
 
 	if (faulting_process(1))
 		err("faulting process failed");
@@ -1206,7 +1212,6 @@ static int userfaultfd_sig_test(void)
 static int userfaultfd_minor_test(void)
 {
 	struct uffdio_register uffdio_register;
-	unsigned long expected_ioctls;
 	unsigned long p;
 	pthread_t uffd_mon;
 	uint8_t expected_byte;
@@ -1228,10 +1233,8 @@ static int userfaultfd_minor_test(void)
 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
 		err("register failure");
 
-	expected_ioctls = uffd_test_ops->expected_ioctls;
-	expected_ioctls |= 1 << _UFFDIO_CONTINUE;
-	if ((uffdio_register.ioctls & expected_ioctls) != expected_ioctls)
-		err("unexpected missing ioctl(s)");
+	assert_expected_ioctls_present(
+		uffdio_register.mode, uffdio_register.ioctls);
 
 	/*
 	 * After registering with UFFD, populate the non-UFFD-registered side of
@@ -1428,8 +1431,6 @@ static int userfaultfd_stress(void)
 	pthread_attr_setstacksize(&attr, 16*1024*1024);
 
 	while (bounces--) {
-		unsigned long expected_ioctls;
-
 		printf("bounces: %d, mode:", bounces);
 		if (bounces & BOUNCE_RANDOM)
 			printf(" rnd");
@@ -1457,10 +1458,8 @@ static int userfaultfd_stress(void)
 			uffdio_register.mode |= UFFDIO_REGISTER_MODE_WP;
 		if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
 			err("register failure");
-		expected_ioctls = uffd_test_ops->expected_ioctls;
-		if ((uffdio_register.ioctls & expected_ioctls) !=
-		    expected_ioctls)
-			err("unexpected missing ioctl for anon memory");
+		assert_expected_ioctls_present(
+			uffdio_register.mode, uffdio_register.ioctls);
 
 		if (area_dst_alias) {
 			uffdio_register.range.start = (unsigned long)
_

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

userfaultfd-selftests-dont-rely-on-gnu-extensions-for-random-numbers.patch
userfaultfd-selftests-fix-feature-support-detection.patch
userfaultfd-selftests-fix-calculation-of-expected-ioctls.patch


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2021-09-21 17:40 + userfaultfd-selftests-fix-calculation-of-expected-ioctls.patch added to -mm tree akpm
2021-10-01 23:58 akpm

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