diff --git a/arch/x86/include/asm/pat.h b/arch/x86/include/asm/pat.h
index 4c35dd0..e2c1668 100644
--- a/arch/x86/include/asm/pat.h
+++ b/arch/x86/include/asm/pat.h
@@ -24,6 +24,4 @@
 
 void io_free_memtype(resource_size_t start, resource_size_t end);
 
-int default_is_untracked_pat_range(u64 start, u64 end);
-
 #endif /* _ASM_X86_PAT_H */
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index 8112ed7..024cf3c 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -113,16 +113,16 @@
 
 /**
  * struct x86_platform_ops - platform specific runtime functions
- * @is_untracked_pat_range	exclude from PAT logic
  * @calibrate_tsc:		calibrate TSC
  * @get_wallclock:		get time from HW clock like RTC etc.
  * @set_wallclock:		set time back to HW clock
+ * @is_untracked_pat_range	exclude from PAT logic
  */
 struct x86_platform_ops {
-	int (*is_untracked_pat_range)(u64 start, u64 end);
 	unsigned long (*calibrate_tsc)(void);
 	unsigned long (*get_wallclock)(void);
 	int (*set_wallclock)(unsigned long nowtime);
+	bool (*is_untracked_pat_range)(u64 start, u64 end);
 };
 
 extern struct x86_init_ops x86_init;
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 2477c9f..597a47b 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -37,12 +37,12 @@
 static enum uv_system_type uv_system_type;
 static u64 gru_start_paddr, gru_end_paddr;
 
-static int is_GRU_range(u64 start, u64 end)
+static inline bool is_GRU_range(u64 start, u64 end)
 {
 	return start >= gru_start_paddr && end < gru_end_paddr;
 }
 
-static int uv_is_untracked_pat_range(u64 start, u64 end)
+static bool uv_is_untracked_pat_range(u64 start, u64 end)
 {
 	return is_ISA_range(start, end) || is_GRU_range(start, end);
 }
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index bcc749e..861b8b5 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -70,8 +70,8 @@
 };
 
 struct x86_platform_ops x86_platform = {
-	.is_untracked_pat_range		= default_is_untracked_pat_range,
 	.calibrate_tsc			= native_calibrate_tsc,
 	.get_wallclock			= mach_get_cmos_time,
 	.set_wallclock			= mach_set_rtc_mmss,
+	.is_untracked_pat_range		= is_ISA_range,
 };
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index b5bc08c..ef71251 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -349,11 +349,6 @@
 	return 0;
 }
 
-int default_is_untracked_pat_range(u64 start, u64 end)
-{
-	return is_ISA_range(start, end);
-}
-
 /*
  * req_type typically has one of the:
  * - _PAGE_CACHE_WB