MIPS: Don't build fast TLB refill handler with 32-bit kernels

The fast handler only supports 64-bit kernels.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Cc: James Hogan <james.hogan@imgtec.com>
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7010/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/mm/tlbex.c

@@ -1250,13 +1250,17 @@ static void build_r4000_tlb_refill_handler(void)
 	unsigned int final_len;
 	struct mips_huge_tlb_info htlb_info __maybe_unused;
 	enum vmalloc64_mode vmalloc_mode __maybe_unused;
-
+#ifdef CONFIG_64BIT
+	bool is64bit = true;
+#else
+	bool is64bit = false;
+#endif
 	memset(tlb_handler, 0, sizeof(tlb_handler));
 	memset(labels, 0, sizeof(labels));
 	memset(relocs, 0, sizeof(relocs));
 	memset(final_handler, 0, sizeof(final_handler));
 
-	if ((scratch_reg >= 0 || scratchpad_available()) && use_bbit_insns()) {
+	if (is64bit && (scratch_reg >= 0 || scratchpad_available()) && use_bbit_insns()) {
 		htlb_info = build_fast_tlb_refill_handler(&p, &l, &r, K0, K1,
 							  scratch_reg);
 		vmalloc_mode = refill_scratch;