diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 9a15334da20864c75f3f7ed49f8d4fa077cad2cd..a9bd80ab670ecbf4cb7427d5d351f66678c8b3b0 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -84,11 +84,11 @@ void unregister_oldmem_pfn_is_ram(void)
 }
 EXPORT_SYMBOL_GPL(unregister_oldmem_pfn_is_ram);
 
-static int pfn_is_ram(unsigned long pfn)
+static bool pfn_is_ram(unsigned long pfn)
 {
 	int (*fn)(unsigned long pfn);
 	/* pfn is ram unless fn() checks pagetype */
-	int ret = 1;
+	bool ret = true;
 
 	/*
 	 * Ask hypervisor if the pfn is really ram.
@@ -97,7 +97,7 @@ static int pfn_is_ram(unsigned long pfn)
 	 */
 	fn = oldmem_pfn_is_ram;
 	if (fn)
-		ret = fn(pfn);
+		ret = !!fn(pfn);
 
 	return ret;
 }
@@ -124,7 +124,7 @@ ssize_t read_from_oldmem(char *buf, size_t count,
 			nr_bytes = count;
 
 		/* If pfn is not ram, return zeros for sparse dump files */
-		if (pfn_is_ram(pfn) == 0)
+		if (!pfn_is_ram(pfn))
 			memset(buf, 0, nr_bytes);
 		else {
 			if (encrypted)