Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/mips/kvm/emulate.c b/arch/mips/kvm/emulate.c
index 4144bfa..754094b 100644
--- a/arch/mips/kvm/emulate.c
+++ b/arch/mips/kvm/emulate.c
@@ -15,7 +15,7 @@
 #include <linux/kvm_host.h>
 #include <linux/vmalloc.h>
 #include <linux/fs.h>
-#include <linux/bootmem.h>
+#include <linux/memblock.h>
 #include <linux/random.h>
 #include <asm/page.h>
 #include <asm/cacheflush.h>
@@ -140,6 +140,7 @@
 		/* These are unconditional and in j_format. */
 	case jal_op:
 		arch->gprs[31] = instpc + 8;
+		/* fall through */
 	case j_op:
 		epc += 4;
 		epc >>= 28;
@@ -1016,10 +1017,10 @@
 		 */
 		preempt_disable();
 		cpu = smp_processor_id();
-		get_new_mmu_context(kern_mm, cpu);
+		get_new_mmu_context(kern_mm);
 		for_each_possible_cpu(i)
 			if (i != cpu)
-				cpu_context(i, kern_mm) = 0;
+				set_cpu_context(i, kern_mm, 0);
 		preempt_enable();
 	}
 	kvm_write_c0_guest_entryhi(cop0, entryhi);
@@ -1090,8 +1091,8 @@
 		if (i == cpu)
 			continue;
 		if (user)
-			cpu_context(i, user_mm) = 0;
-		cpu_context(i, kern_mm) = 0;
+			set_cpu_context(i, user_mm, 0);
+		set_cpu_context(i, kern_mm, 0);
 	}
 
 	preempt_enable();
@@ -1141,9 +1142,7 @@
 	unsigned long pc = vcpu->arch.pc;
 	int index;
 
-	get_random_bytes(&index, sizeof(index));
-	index &= (KVM_MIPS_GUEST_TLB_SIZE - 1);
-
+	index = prandom_u32_max(KVM_MIPS_GUEST_TLB_SIZE);
 	tlb = &vcpu->arch.guest_tlb[index];
 
 	kvm_mips_invalidate_guest_tlb(vcpu, tlb);