x86, platform: Change is_untracked_pat_range() to bool; cleanup init

- Change is_untracked_pat_range() to return bool.
- Clean up the initialization of is_untracked_pat_range() -- by default,
we simply point it at is_ISA_range() directly.
- Move is_untracked_pat_range to the end of struct x86_platform, since
it is the newest field.

Signed-off-by: H. Peter Anvin <[e-mail]>
Acked-by: Thomas Gleixner <[e-mail]>
Cc: Jack Steiner <[e-mail]>
LKML-Reference: <[e-mail]>

arch/x86/include/asm/pat.h

···
 
 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 */

arch/x86/include/asm/x86_init.h

···
 
 /**
  * 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;

arch/x86/kernel/apic/x2apic_uv_x.c

···
 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);
 }

arch/x86/kernel/x86_init.c

···
 };
 
 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,
 };

arch/x86/mm/pat.c

···
 	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