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".

Link: https://lkml.kernel.org/r/20221205193716.276024-5-david@redhat.comSigned-off-by: David Hildenbrand <david@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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;

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)