linux-kernel - [PATCH mm-unstable v1 4/4] selftests/vm: ksm_functional

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Date:   Mon,  5 Dec 2022 20:37:16 +0100
From:   David Hildenbrand <david@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
        David Hildenbrand <david@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Shuah Khan <shuah@...nel.org>,
        Yang Li <yang.lee@...ux.alibaba.com>
Subject: [PATCH mm-unstable v1 4/4] selftests/vm: ksm_functional_tests: fixes for 32bit

The test currently fails on 32bit. Fixing the "-1ull" vs. "-1ul" seems
to make the test pass and the compiler happy.

Note: This test is not in mm-stable yet. This fix should be squashed into
      "selftests/vm: add KSM unmerge tests".

Signed-off-by: David Hildenbrand <david@...hat.com>
---
 tools/testing/selftests/vm/ksm_functional_tests.c | 4 ++--
 tools/testing/selftests/vm/vm_util.c              | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/vm/ksm_functional_tests.c b/tools/testing/selftests/vm/ksm_functional_tests.c
index 96644be68962..b11b7e5115dc 100644
--- a/tools/testing/selftests/vm/ksm_functional_tests.c
+++ b/tools/testing/selftests/vm/ksm_functional_tests.c
@@ -42,13 +42,13 @@ static bool range_maps_duplicates(char *addr, unsigned long size)
 	for (offs_a = 0; offs_a < size; offs_a += pagesize) {
 		pfn_a = pagemap_get_pfn(pagemap_fd, addr + offs_a);
 		/* Page not present or PFN not exposed by the kernel. */
-		if (pfn_a == -1ull || !pfn_a)
+		if (pfn_a == -1ul || !pfn_a)
 			continue;
 
 		for (offs_b = offs_a + pagesize; offs_b < size;
 		     offs_b += pagesize) {
 			pfn_b = pagemap_get_pfn(pagemap_fd, addr + offs_b);
-			if (pfn_b == -1ull || !pfn_b)
+			if (pfn_b == -1ul || !pfn_b)
 				continue;
 			if (pfn_a == pfn_b)
 				return true;
diff --git a/tools/testing/selftests/vm/vm_util.c b/tools/testing/selftests/vm/vm_util.c
index 710571902743..40e795624ff3 100644
--- a/tools/testing/selftests/vm/vm_util.c
+++ b/tools/testing/selftests/vm/vm_util.c
@@ -50,7 +50,7 @@ unsigned long pagemap_get_pfn(int fd, char *start)
 	/* If present (63th bit), PFN is at bit 0 -- 54. */
 	if (entry & 0x8000000000000000ull)
 		return entry & 0x007fffffffffffffull;
-	return -1ull;
+	return -1ul;
 }
 
 void clear_softdirty(void)
-- 
2.38.1