{rd,wr}msr_on_cpu SMP=n optimization

Let's save a few bytes in the CONFIG_SMP=n case.

Signed-off-by: Adrian Bunk <[e-mail]>
Signed-off-by: Dave Jones <[e-mail]>

arch/i386/lib/Makefile

···
 
 lib-$(CONFIG_X86_USE_3DNOW) += mmx.o
 
-obj-y = msr-on-cpu.o
+obj-$(CONFIG_SMP)	+= msr-on-cpu.o

arch/i386/lib/msr-on-cpu.c

···
 #include <linux/smp.h>
 #include <asm/msr.h>
 
-#ifdef CONFIG_SMP
 struct msr_info {
 	u32 msr_no;
 	u32 l, h;
···
 	}
 	preempt_enable();
 }
-#else
-void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
-{
-	rdmsr(msr_no, *l, *h);
-}
-
-void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
-{
-	wrmsr(msr_no, l, h);
-}
-#endif
 
 EXPORT_SYMBOL(rdmsr_on_cpu);
 EXPORT_SYMBOL(wrmsr_on_cpu);

arch/x86_64/lib/Makefile

···
 
 CFLAGS_csum-partial.o := -funroll-loops
 
-obj-y := io.o iomap_copy.o msr-on-cpu.o
+obj-y := io.o iomap_copy.o
+obj-$(CONFIG_SMP)	+= msr-on-cpu.o
 
 lib-y := csum-partial.o csum-copy.o csum-wrappers.o delay.o \
 	usercopy.o getuser.o putuser.o  \

include/asm-i386/msr.h

···
 			  : "c" (counter))
 #endif	/* !CONFIG_PARAVIRT */
 
+#ifdef CONFIG_SMP
 void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h);
 void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h);
+#else  /*  CONFIG_SMP  */
+static inline void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
+{
+	rdmsr(msr_no, *l, *h);
+}
+static inline void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
+{
+	wrmsr(msr_no, l, h);
+}
+#endif  /*  CONFIG_SMP  */
 
 /* symbolic names for some interesting MSRs */
 /* Intel defined MSRs. */

include/asm-x86_64/msr.h

···
 #define MSR_IA32_UCODE_WRITE		0x79
 #define MSR_IA32_UCODE_REV		0x8b
 
+#ifdef CONFIG_SMP
 void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h);
 void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h);
+#else  /*  CONFIG_SMP  */
+static inline void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
+{
+	rdmsr(msr_no, *l, *h);
+}
+static inline void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
+{
+	wrmsr(msr_no, l, h);
+}
+#endif  /*  CONFIG_SMP  */
 
 #endif