diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
index 40fe14a6c2..7a7bd4d824 100644
--- a/target/ppc/cpu_init.c
+++ b/target/ppc/cpu_init.c
@@ -894,25 +894,25 @@ static void register_BookE206_sprs(CPUPPCState *env, uint32_t mas_mask,
                      SPR_NOACCESS, SPR_NOACCESS,
                      &spr_read_generic, SPR_NOACCESS,
                      tlbncfg[3]);
-        /* Fallthru */
+        fallthrough;
     case 3:
         spr_register(env, SPR_BOOKE_TLB2CFG, "TLB2CFG",
                      SPR_NOACCESS, SPR_NOACCESS,
                      &spr_read_generic, SPR_NOACCESS,
                      tlbncfg[2]);
-        /* Fallthru */
+        fallthrough;
     case 2:
         spr_register(env, SPR_BOOKE_TLB1CFG, "TLB1CFG",
                      SPR_NOACCESS, SPR_NOACCESS,
                      &spr_read_generic, SPR_NOACCESS,
                      tlbncfg[1]);
-        /* Fallthru */
+        fallthrough;
     case 1:
         spr_register(env, SPR_BOOKE_TLB0CFG, "TLB0CFG",
                      SPR_NOACCESS, SPR_NOACCESS,
                      &spr_read_generic, SPR_NOACCESS,
                      tlbncfg[0]);
-        /* Fallthru */
+        fallthrough;
     case 0:
     default:
         break;
diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index 7926114d5c..b8be34051c 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -1334,7 +1334,7 @@ static bool is_prefix_insn_excp(PowerPCCPU *cpu, int excp)
              */
             break;
         }
-        /* fall through */
+        fallthrough;
     case POWERPC_EXCP_MCHECK:
     case POWERPC_EXCP_DSI:
     case POWERPC_EXCP_DSEG:
@@ -1576,7 +1576,7 @@ static void powerpc_excp_books(PowerPCCPU *cpu, int excp)
         break;
     case POWERPC_EXCP_TRACE:     /* Trace exception                          */
         msr |= env->error_code;
-        /* fall through */
+        fallthrough;
     case POWERPC_EXCP_DSEG:      /* Data segment exception                   */
     case POWERPC_EXCP_ISEG:      /* Instruction segment exception            */
     case POWERPC_EXCP_SDOOR:     /* Doorbell interrupt                       */
@@ -1584,7 +1584,7 @@ static void powerpc_excp_books(PowerPCCPU *cpu, int excp)
         break;
     case POWERPC_EXCP_HISI:      /* Hypervisor instruction storage exception */
         msr |= env->error_code;
-        /* fall through */
+        fallthrough;
     case POWERPC_EXCP_HDECR:     /* Hypervisor decrementer exception         */
     case POWERPC_EXCP_HDSI:      /* Hypervisor data storage exception        */
     case POWERPC_EXCP_SDOOR_HV:  /* Hypervisor Doorbell interrupt            */
diff --git a/target/ppc/mmu-radix64.c b/target/ppc/mmu-radix64.c
index 5823e039e6..a85bd614bf 100644
--- a/target/ppc/mmu-radix64.c
+++ b/target/ppc/mmu-radix64.c
@@ -126,7 +126,7 @@ static void ppc_radix64_raise_si(PowerPCCPU *cpu, MMUAccessType access_type,
         break;
     case MMU_DATA_STORE:
         cause |= DSISR_ISSTORE;
-        /* fall through */
+        fallthrough;
     case MMU_DATA_LOAD:
         /* Data Storage Interrupt */
         cs->exception_index = POWERPC_EXCP_DSI;
@@ -166,7 +166,7 @@ static void ppc_radix64_raise_hsi(PowerPCCPU *cpu, MMUAccessType access_type,
         break;
     case MMU_DATA_STORE:
         cause |= DSISR_ISSTORE;
-        /* fall through */
+        fallthrough;
     case MMU_DATA_LOAD:
         /* H Data Storage Interrupt */
         cs->exception_index = POWERPC_EXCP_HDSI;
@@ -226,7 +226,7 @@ static int ppc_radix64_check_rc(MMUAccessType access_type, uint64_t pte)
         if (!(pte & R_PTE_C)) {
             break;
         }
-        /* fall through */
+        fallthrough;
     case MMU_INST_FETCH:
     case MMU_DATA_LOAD:
         if (!(pte & R_PTE_R)) {
diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c
index 6ca5d12207..dd44befe6f 100644
--- a/target/ppc/mmu_common.c
+++ b/target/ppc/mmu_common.c
@@ -76,7 +76,7 @@ static int pp_check(int key, int pp, int nx)
         case 0x1:
         case 0x2:
             access |= PAGE_WRITE;
-            /* fall through */
+            fallthrough;
         case 0x3:
             access |= PAGE_READ;
             break;
@@ -559,7 +559,7 @@ static int mmu40x_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
             if (pr != 0) {
                 goto check_perms;
             }
-            /* fall through */
+            fallthrough;
         case 0x3:
             /* All accesses granted */
             ctx->prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
@@ -573,7 +573,7 @@ static int mmu40x_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
                 ret = -2;
                 break;
             }
-            /* fall through */
+            fallthrough;
         case 0x1:
         check_perms:
             /* Check from TLB entry */
@@ -1349,7 +1349,7 @@ static bool ppc_jumbo_xlate(PowerPCCPU *cpu, vaddr eaddr,
                     break;
                 case POWERPC_MMU_BOOKE206:
                     booke206_update_mas_tlb_miss(env, eaddr, 2, mmu_idx);
-                    /* fall through */
+                    fallthrough;
                 case POWERPC_MMU_BOOKE:
                     cs->exception_index = POWERPC_EXCP_ITLB;
                     env->error_code = 0;
@@ -1435,7 +1435,7 @@ static bool ppc_jumbo_xlate(PowerPCCPU *cpu, vaddr eaddr,
                     cpu_abort(cs, "MPC8xx MMU model is not implemented\n");
                 case POWERPC_MMU_BOOKE206:
                     booke206_update_mas_tlb_miss(env, eaddr, access_type, mmu_idx);
-                    /* fall through */
+                    fallthrough;
                 case POWERPC_MMU_BOOKE:
                     cs->exception_index = POWERPC_EXCP_DTLB;
                     env->error_code = 0;
@@ -1530,7 +1530,7 @@ bool ppc_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type,
             return ppc_radix64_xlate(cpu, eaddr, access_type, raddrp,
                                      psizep, protp, mmu_idx, guest_visible);
         }
-        /* fall through */
+        fallthrough;
     case POWERPC_MMU_64B:
     case POWERPC_MMU_2_03:
     case POWERPC_MMU_2_06:
diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index 329da4d518..a67b77258d 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -7472,10 +7472,10 @@ static void ppc_tr_tb_stop(DisasContextBase *dcbase, CPUState *cs)
             tcg_gen_exit_tb(ctx->base.tb, 0);
             break;
         }
-        /* fall through */
+        fallthrough;
     case DISAS_CHAIN_UPDATE:
         gen_update_nip(ctx, nip);
-        /* fall through */
+        fallthrough;
     case DISAS_CHAIN:
         /*
          * tcg_gen_lookup_and_goto_ptr will exit the TB if
@@ -7490,7 +7490,7 @@ static void ppc_tr_tb_stop(DisasContextBase *dcbase, CPUState *cs)
 
     case DISAS_EXIT_UPDATE:
         gen_update_nip(ctx, nip);
-        /* fall through */
+        fallthrough;
     case DISAS_EXIT:
         pmu_count_insns(ctx);
         tcg_gen_exit_tb(NULL, 0);
