powerpc/32s: Inline _tlbie() on non SMP

On non SMP, _tlbie() is just a tlbie plus a sync instruction.

Make it static inline.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/475136425541db5c7c8a0395d19d400525b251bc.1603348103.git.christophe.leroy@csgroup.eu

arch/powerpc/include/asm/book3s/32/tlbflush.h

@@ -12,7 +12,14 @@ extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
 			    unsigned long end);
 extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
 
+#ifdef CONFIG_SMP
 void _tlbie(unsigned long address);
+#else
+static inline void _tlbie(unsigned long address)
+{
+	asm volatile ("tlbie %0; sync" : : "r" (address) : "memory");
+}
+#endif
 void _tlbia(void);
 
 static inline void local_flush_tlb_page(struct vm_area_struct *vma,

arch/powerpc/mm/book3s32/hash_low.S

@@ -622,8 +622,8 @@ _ASM_NOKPROBE_SYMBOL(flush_hash_pages)
 /*
  * Flush an entry from the TLB
  */
-_GLOBAL(_tlbie)
 #ifdef CONFIG_SMP
+_GLOBAL(_tlbie)
 	lwz	r8,TASK_CPU(r2)
 	oris	r8,r8,11
 	mfmsr	r10
@@ -647,12 +647,9 @@ _GLOBAL(_tlbie)
 	stw	r0,0(r9)		/* clear mmu_hash_lock */
 	mtmsr	r10
 	isync
-#else /* CONFIG_SMP */
-	tlbie	r3
-	sync
-#endif /* CONFIG_SMP */
 	blr
 _ASM_NOKPROBE_SYMBOL(_tlbie)
+#endif /* CONFIG_SMP */
 
 /*
  * Flush the entire TLB. 603/603e only