diff --git a/src/core/lib/channel/channel_args.c b/src/core/lib/channel/channel_args.c
index 16d0737b405..9215707f1c3 100644
--- a/src/core/lib/channel/channel_args.c
+++ b/src/core/lib/channel/channel_args.c
@@ -212,7 +212,7 @@ void grpc_channel_args_destroy(grpc_exec_ctx *exec_ctx, grpc_channel_args *a) {
 grpc_compression_algorithm grpc_channel_args_get_compression_algorithm(
     const grpc_channel_args *a) {
   size_t i;
-  if (a == NULL) return 0;
+  if (a == NULL) return GRPC_COMPRESS_NONE;
   for (i = 0; i < a->num_args; ++i) {
     if (a->args[i].type == GRPC_ARG_INTEGER &&
         !strcmp(GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM, a->args[i].key)) {
@@ -226,7 +226,7 @@ grpc_compression_algorithm grpc_channel_args_get_compression_algorithm(
 grpc_stream_compression_algorithm
 grpc_channel_args_get_stream_compression_algorithm(const grpc_channel_args *a) {
   size_t i;
-  if (a == NULL) return 0;
+  if (a == NULL) return GRPC_STREAM_COMPRESS_NONE;
   for (i = 0; i < a->num_args; ++i) {
     if (a->args[i].type == GRPC_ARG_INTEGER &&
         !strcmp(GRPC_STREAM_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM,
diff --git a/src/core/lib/channel/channel_stack_builder.c b/src/core/lib/channel/channel_stack_builder.c
index df45f13c813..b663ebfb522 100644
--- a/src/core/lib/channel/channel_stack_builder.c
+++ b/src/core/lib/channel/channel_stack_builder.c
@@ -214,13 +214,13 @@ bool grpc_channel_stack_builder_prepend_filter(
 static void add_after(filter_node *before, const grpc_channel_filter *filter,
                       grpc_post_filter_create_init_func post_init_func,
                       void *user_data) {
-  filter_node *new = (filter_node *)gpr_malloc(sizeof(*new));
-  new->next = before->next;
-  new->prev = before;
-  new->next->prev = new->prev->next = new;
-  new->filter = filter;
-  new->init = post_init_func;
-  new->init_arg = user_data;
+  filter_node *new_node = (filter_node *)gpr_malloc(sizeof(*new_node));
+  new_node->next = before->next;
+  new_node->prev = before;
+  new_node->next->prev = new_node->prev->next = new_node;
+  new_node->filter = filter;
+  new_node->init = post_init_func;
+  new_node->init_arg = user_data;
 }
 
 bool grpc_channel_stack_builder_add_filter_before(
@@ -268,7 +268,7 @@ grpc_error *grpc_channel_stack_builder_finish(
 
   // create an array of filters
   const grpc_channel_filter **filters =
-      gpr_malloc(sizeof(*filters) * num_filters);
+      (const grpc_channel_filter **)gpr_malloc(sizeof(*filters) * num_filters);
   size_t i = 0;
   for (filter_node *p = builder->begin.next; p != &builder->end; p = p->next) {
     filters[i++] = p->filter;
diff --git a/src/core/lib/compression/stream_compression.c b/src/core/lib/compression/stream_compression.c
index df13d53e06f..ba9302794f7 100644
--- a/src/core/lib/compression/stream_compression.c
+++ b/src/core/lib/compression/stream_compression.c
@@ -159,7 +159,8 @@ bool grpc_stream_decompress(grpc_stream_compression_context *ctx,
 grpc_stream_compression_context *grpc_stream_compression_context_create(
     grpc_stream_compression_method method) {
   grpc_stream_compression_context *ctx =
-      gpr_zalloc(sizeof(grpc_stream_compression_context));
+      (grpc_stream_compression_context *)gpr_zalloc(
+          sizeof(grpc_stream_compression_context));
   int r;
   if (ctx == NULL) {
     return NULL;
diff --git a/src/core/lib/iomgr/combiner.c b/src/core/lib/iomgr/combiner.c
index 360967f3ba2..f899b25f105 100644
--- a/src/core/lib/iomgr/combiner.c
+++ b/src/core/lib/iomgr/combiner.c
@@ -356,7 +356,8 @@ static void combiner_finally_exec(grpc_exec_ctx *exec_ctx,
 
 static void enqueue_finally(grpc_exec_ctx *exec_ctx, void *closure,
                             grpc_error *error) {
-  combiner_finally_exec(exec_ctx, closure, GRPC_ERROR_REF(error));
+  combiner_finally_exec(exec_ctx, (grpc_closure *)closure,
+                        GRPC_ERROR_REF(error));
 }
 
 grpc_closure_scheduler *grpc_combiner_scheduler(grpc_combiner *combiner) {
diff --git a/src/core/lib/iomgr/error.c b/src/core/lib/iomgr/error.c
index dcd175a2e1a..d5e00a8f643 100644
--- a/src/core/lib/iomgr/error.c
+++ b/src/core/lib/iomgr/error.c
@@ -278,13 +278,13 @@ static void internal_set_time(grpc_error **err, grpc_error_times which,
   memcpy((*err)->arena + slot, &value, sizeof(value));
 }
 
-static void internal_add_error(grpc_error **err, grpc_error *new) {
-  grpc_linked_error new_last = {new, UINT8_MAX};
+static void internal_add_error(grpc_error **err, grpc_error *new_err) {
+  grpc_linked_error new_last = {new_err, UINT8_MAX};
   uint8_t slot = get_placement(err, sizeof(grpc_linked_error));
   if (slot == UINT8_MAX) {
-    gpr_log(GPR_ERROR, "Error %p is full, dropping error %p = %s", *err, new,
-            grpc_error_string(new));
-    GRPC_ERROR_UNREF(new);
+    gpr_log(GPR_ERROR, "Error %p is full, dropping error %p = %s", *err,
+            new_err, grpc_error_string(new_err));
+    GRPC_ERROR_UNREF(new_err);
     return;
   }
   if ((*err)->first_err == UINT8_MAX) {
@@ -321,8 +321,8 @@ grpc_error *grpc_error_create(const char *file, int line, grpc_slice desc,
   uint8_t initial_arena_capacity = (uint8_t)(
       DEFAULT_ERROR_CAPACITY +
       (uint8_t)(num_referencing * SLOTS_PER_LINKED_ERROR) + SURPLUS_CAPACITY);
-  grpc_error *err =
-      gpr_malloc(sizeof(*err) + initial_arena_capacity * sizeof(intptr_t));
+  grpc_error *err = (grpc_error *)gpr_malloc(
+      sizeof(*err) + initial_arena_capacity * sizeof(intptr_t));
   if (err == NULL) {  // TODO(ctiller): make gpr_malloc return NULL
     return GRPC_ERROR_OOM;
   }
@@ -432,10 +432,10 @@ static grpc_error *copy_error_and_unref(grpc_error *in) {
 grpc_error *grpc_error_set_int(grpc_error *src, grpc_error_ints which,
                                intptr_t value) {
   GPR_TIMER_BEGIN("grpc_error_set_int", 0);
-  grpc_error *new = copy_error_and_unref(src);
-  internal_set_int(&new, which, value);
+  grpc_error *new_err = copy_error_and_unref(src);
+  internal_set_int(&new_err, which, value);
   GPR_TIMER_END("grpc_error_set_int", 0);
-  return new;
+  return new_err;
 }
 
 typedef struct {
@@ -477,10 +477,10 @@ bool grpc_error_get_int(grpc_error *err, grpc_error_ints which, intptr_t *p) {
 grpc_error *grpc_error_set_str(grpc_error *src, grpc_error_strs which,
                                grpc_slice str) {
   GPR_TIMER_BEGIN("grpc_error_set_str", 0);
-  grpc_error *new = copy_error_and_unref(src);
-  internal_set_str(&new, which, str);
+  grpc_error *new_err = copy_error_and_unref(src);
+  internal_set_str(&new_err, which, str);
   GPR_TIMER_END("grpc_error_set_str", 0);
-  return new;
+  return new_err;
 }
 
 bool grpc_error_get_str(grpc_error *err, grpc_error_strs which,
@@ -507,10 +507,10 @@ bool grpc_error_get_str(grpc_error *err, grpc_error_strs which,
 
 grpc_error *grpc_error_add_child(grpc_error *src, grpc_error *child) {
   GPR_TIMER_BEGIN("grpc_error_add_child", 0);
-  grpc_error *new = copy_error_and_unref(src);
-  internal_add_error(&new, child);
+  grpc_error *new_err = copy_error_and_unref(src);
+  internal_add_error(&new_err, child);
   GPR_TIMER_END("grpc_error_add_child", 0);
-  return new;
+  return new_err;
 }
 
 static const char *no_error_string = "\"No Error\"";
@@ -733,7 +733,7 @@ const char *grpc_error_string(grpc_error *err) {
   void *p = (void *)gpr_atm_acq_load(&err->atomics.error_string);
   if (p != NULL) {
     GPR_TIMER_END("grpc_error_string", 0);
-    return p;
+    return (const char *)p;
   }
 
   kv_pairs kvs;
diff --git a/src/core/lib/iomgr/ev_epoll1_linux.c b/src/core/lib/iomgr/ev_epoll1_linux.c
index 5bc7e878de0..01d28220c71 100644
--- a/src/core/lib/iomgr/ev_epoll1_linux.c
+++ b/src/core/lib/iomgr/ev_epoll1_linux.c
@@ -130,9 +130,9 @@ static void fd_global_shutdown(void);
  * Pollset Declarations
  */
 
-typedef enum { UNKICKED, KICKED, DESIGNATED_POLLER } kick_state;
+typedef enum { UNKICKED, KICKED, DESIGNATED_POLLER } kick_state_t;
 
-static const char *kick_state_string(kick_state st) {
+static const char *kick_state_string(kick_state_t st) {
   switch (st) {
     case UNKICKED:
       return "UNKICKED";
@@ -145,7 +145,7 @@ static const char *kick_state_string(kick_state st) {
 }
 
 struct grpc_pollset_worker {
-  kick_state kick_state;
+  kick_state_t kick_state;
   int kick_state_mutator;  // which line of code last changed kick state
   bool initialized_cv;
   grpc_pollset_worker *next;
diff --git a/src/core/lib/iomgr/ev_epollex_linux.c b/src/core/lib/iomgr/ev_epollex_linux.c
index 277347ac704..df69025f1a3 100644
--- a/src/core/lib/iomgr/ev_epollex_linux.c
+++ b/src/core/lib/iomgr/ev_epollex_linux.c
@@ -97,12 +97,12 @@ static void pg_join(grpc_exec_ctx *exec_ctx, polling_group *pg,
  * pollable Declarations
  */
 
-typedef struct pollable {
+typedef struct pollable_t {
   polling_obj po;
   int epfd;
   grpc_wakeup_fd wakeup;
   grpc_pollset_worker *root_worker;
-} pollable;
+} pollable_t;
 
 static const char *polling_obj_type_string(polling_obj_type t) {
   switch (t) {
@@ -122,7 +122,7 @@ static const char *polling_obj_type_string(polling_obj_type t) {
   return "<invalid>";
 }
 
-static char *pollable_desc(pollable *p) {
+static char *pollable_desc(pollable_t *p) {
   char *out;
   gpr_asprintf(&out, "type=%s group=%p epfd=%d wakeup=%d",
                polling_obj_type_string(p->po.type), p->po.group, p->epfd,
@@ -130,19 +130,19 @@ static char *pollable_desc(pollable *p) {
   return out;
 }
 
-static pollable g_empty_pollable;
+static pollable_t g_empty_pollable;
 
-static void pollable_init(pollable *p, polling_obj_type type);
-static void pollable_destroy(pollable *p);
+static void pollable_init(pollable_t *p, polling_obj_type type);
+static void pollable_destroy(pollable_t *p);
 /* ensure that p->epfd, p->wakeup are initialized; p->po.mu must be held */
-static grpc_error *pollable_materialize(pollable *p);
+static grpc_error *pollable_materialize(pollable_t *p);
 
 /*******************************************************************************
  * Fd Declarations
  */
 
 struct grpc_fd {
-  pollable pollable;
+  pollable_t pollable;
   int fd;
   /* refst format:
        bit 0    : 1=Active / 0=Orphaned
@@ -193,15 +193,15 @@ struct grpc_pollset_worker {
   pollset_worker_link links[POLLSET_WORKER_LINK_COUNT];
   gpr_cv cv;
   grpc_pollset *pollset;
-  pollable *pollable;
+  pollable_t *pollable;
 };
 
 #define MAX_EPOLL_EVENTS 100
 #define MAX_EPOLL_EVENTS_HANDLED_EACH_POLL_CALL 5
 
 struct grpc_pollset {
-  pollable pollable;
-  pollable *current_pollable;
+  pollable_t pollable;
+  pollable_t *current_pollable;
   int kick_alls_pending;
   bool kicked_without_poller;
   grpc_closure *shutdown_closure;
@@ -451,13 +451,13 @@ static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
  * Pollable Definitions
  */
 
-static void pollable_init(pollable *p, polling_obj_type type) {
+static void pollable_init(pollable_t *p, polling_obj_type type) {
   po_init(&p->po, type);
   p->root_worker = NULL;
   p->epfd = -1;
 }
 
-static void pollable_destroy(pollable *p) {
+static void pollable_destroy(pollable_t *p) {
   po_destroy(&p->po);
   if (p->epfd != -1) {
     close(p->epfd);
@@ -466,7 +466,7 @@ static void pollable_destroy(pollable *p) {
 }
 
 /* ensure that p->epfd, p->wakeup are initialized; p->po.mu must be held */
-static grpc_error *pollable_materialize(pollable *p) {
+static grpc_error *pollable_materialize(pollable_t *p) {
   if (p->epfd == -1) {
     int new_epfd = epoll_create1(EPOLL_CLOEXEC);
     if (new_epfd < 0) {
@@ -492,7 +492,7 @@ static grpc_error *pollable_materialize(pollable *p) {
 }
 
 /* pollable must be materialized */
-static grpc_error *pollable_add_fd(pollable *p, grpc_fd *fd) {
+static grpc_error *pollable_add_fd(pollable_t *p, grpc_fd *fd) {
   grpc_error *error = GRPC_ERROR_NONE;
   static const char *err_desc = "pollable_add_fd";
   const int epfd = p->epfd;
@@ -599,7 +599,7 @@ static void pollset_kick_all(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
                      GRPC_ERROR_NONE);
 }
 
-static grpc_error *pollset_kick_inner(grpc_pollset *pollset, pollable *p,
+static grpc_error *pollset_kick_inner(grpc_pollset *pollset, pollable_t *p,
                                       grpc_pollset_worker *specific_worker) {
   if (GRPC_TRACER_ON(grpc_polling_trace)) {
     gpr_log(GPR_DEBUG,
@@ -664,7 +664,7 @@ static grpc_error *pollset_kick_inner(grpc_pollset *pollset, pollable *p,
 /* p->po.mu must be held before calling this function */
 static grpc_error *pollset_kick(grpc_pollset *pollset,
                                 grpc_pollset_worker *specific_worker) {
-  pollable *p = pollset->current_pollable;
+  pollable_t *p = pollset->current_pollable;
   if (p != &pollset->pollable) {
     gpr_mu_lock(&p->po.mu);
   }
@@ -744,7 +744,7 @@ static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   pollset_maybe_finish_shutdown(exec_ctx, pollset);
 }
 
-static bool pollset_is_pollable_fd(grpc_pollset *pollset, pollable *p) {
+static bool pollset_is_pollable_fd(grpc_pollset *pollset, pollable_t *p) {
   return p != &g_empty_pollable && p != &pollset->pollable;
 }
 
@@ -762,8 +762,9 @@ static grpc_error *pollset_process_events(grpc_exec_ctx *exec_ctx,
       if (GRPC_TRACER_ON(grpc_polling_trace)) {
         gpr_log(GPR_DEBUG, "PS:%p got pollset_wakeup %p", pollset, data_ptr);
       }
-      append_error(&error, grpc_wakeup_fd_consume_wakeup(
-                               (void *)((~(intptr_t)1) & (intptr_t)data_ptr)),
+      append_error(&error,
+                   grpc_wakeup_fd_consume_wakeup(
+                       (grpc_wakeup_fd *)((~(intptr_t)1) & (intptr_t)data_ptr)),
                    err_desc);
     } else {
       grpc_fd *fd = (grpc_fd *)data_ptr;
@@ -800,7 +801,7 @@ static void pollset_destroy(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
 }
 
 static grpc_error *pollset_epoll(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                                 pollable *p, gpr_timespec now,
+                                 pollable_t *p, gpr_timespec now,
                                  gpr_timespec deadline) {
   int timeout = poll_deadline_to_millis_timeout(deadline, now);
 
@@ -1028,7 +1029,7 @@ static grpc_error *pollset_add_fd_locked(grpc_exec_ctx *exec_ctx,
               "PS:%p add fd %p; transition pollable from empty to fd", pollset,
               fd);
     }
-    /* empty pollable --> single fd pollable */
+    /* empty pollable --> single fd pollable_t */
     pollset_kick_all(exec_ctx, pollset);
     pollset->current_pollable = &fd->pollable;
     if (!fd_locked) gpr_mu_lock(&fd->pollable.po.mu);
diff --git a/src/core/lib/iomgr/polling_entity.c b/src/core/lib/iomgr/polling_entity.c
index 74d8794af50..8591a5518e3 100644
--- a/src/core/lib/iomgr/polling_entity.c
+++ b/src/core/lib/iomgr/polling_entity.c
@@ -25,7 +25,7 @@ grpc_polling_entity grpc_polling_entity_create_from_pollset_set(
     grpc_pollset_set *pollset_set) {
   grpc_polling_entity pollent;
   pollent.pollent.pollset_set = pollset_set;
-  pollent.tag = POPS_POLLSET_SET;
+  pollent.tag = GRPC_POLLS_POLLSET_SET;
   return pollent;
 }
 
@@ -33,12 +33,12 @@ grpc_polling_entity grpc_polling_entity_create_from_pollset(
     grpc_pollset *pollset) {
   grpc_polling_entity pollent;
   pollent.pollent.pollset = pollset;
-  pollent.tag = POPS_POLLSET;
+  pollent.tag = GRPC_POLLS_POLLSET;
   return pollent;
 }
 
 grpc_pollset *grpc_polling_entity_pollset(grpc_polling_entity *pollent) {
-  if (pollent->tag == POPS_POLLSET) {
+  if (pollent->tag == GRPC_POLLS_POLLSET) {
     return pollent->pollent.pollset;
   }
   return NULL;
@@ -46,23 +46,23 @@ grpc_pollset *grpc_polling_entity_pollset(grpc_polling_entity *pollent) {
 
 grpc_pollset_set *grpc_polling_entity_pollset_set(
     grpc_polling_entity *pollent) {
-  if (pollent->tag == POPS_POLLSET_SET) {
+  if (pollent->tag == GRPC_POLLS_POLLSET_SET) {
     return pollent->pollent.pollset_set;
   }
   return NULL;
 }
 
 bool grpc_polling_entity_is_empty(const grpc_polling_entity *pollent) {
-  return pollent->tag == POPS_NONE;
+  return pollent->tag == GRPC_POLLS_NONE;
 }
 
 void grpc_polling_entity_add_to_pollset_set(grpc_exec_ctx *exec_ctx,
                                             grpc_polling_entity *pollent,
                                             grpc_pollset_set *pss_dst) {
-  if (pollent->tag == POPS_POLLSET) {
+  if (pollent->tag == GRPC_POLLS_POLLSET) {
     GPR_ASSERT(pollent->pollent.pollset != NULL);
     grpc_pollset_set_add_pollset(exec_ctx, pss_dst, pollent->pollent.pollset);
-  } else if (pollent->tag == POPS_POLLSET_SET) {
+  } else if (pollent->tag == GRPC_POLLS_POLLSET_SET) {
     GPR_ASSERT(pollent->pollent.pollset_set != NULL);
     grpc_pollset_set_add_pollset_set(exec_ctx, pss_dst,
                                      pollent->pollent.pollset_set);
@@ -75,10 +75,10 @@ void grpc_polling_entity_add_to_pollset_set(grpc_exec_ctx *exec_ctx,
 void grpc_polling_entity_del_from_pollset_set(grpc_exec_ctx *exec_ctx,
                                               grpc_polling_entity *pollent,
                                               grpc_pollset_set *pss_dst) {
-  if (pollent->tag == POPS_POLLSET) {
+  if (pollent->tag == GRPC_POLLS_POLLSET) {
     GPR_ASSERT(pollent->pollent.pollset != NULL);
     grpc_pollset_set_del_pollset(exec_ctx, pss_dst, pollent->pollent.pollset);
-  } else if (pollent->tag == POPS_POLLSET_SET) {
+  } else if (pollent->tag == GRPC_POLLS_POLLSET_SET) {
     GPR_ASSERT(pollent->pollent.pollset_set != NULL);
     grpc_pollset_set_del_pollset_set(exec_ctx, pss_dst,
                                      pollent->pollent.pollset_set);
diff --git a/src/core/lib/iomgr/polling_entity.h b/src/core/lib/iomgr/polling_entity.h
index 971fd88b428..a161e1fea6f 100644
--- a/src/core/lib/iomgr/polling_entity.h
+++ b/src/core/lib/iomgr/polling_entity.h
@@ -22,6 +22,12 @@
 #include "src/core/lib/iomgr/pollset.h"
 #include "src/core/lib/iomgr/pollset_set.h"
 
+typedef enum grpc_pollset_tag {
+  GRPC_POLLS_NONE,
+  GRPC_POLLS_POLLSET,
+  GRPC_POLLS_POLLSET_SET
+} grpc_pollset_tag;
+
 /* A grpc_polling_entity is a pollset-or-pollset_set container. It allows
  * functions that accept a pollset XOR a pollset_set to do so through an
  * abstract interface. No ownership is taken. */
@@ -31,7 +37,7 @@ typedef struct grpc_polling_entity {
     grpc_pollset *pollset;
     grpc_pollset_set *pollset_set;
   } pollent;
-  enum pops_tag { POPS_NONE, POPS_POLLSET, POPS_POLLSET_SET } tag;
+  grpc_pollset_tag tag;
 } grpc_polling_entity;
 
 grpc_polling_entity grpc_polling_entity_create_from_pollset_set(
diff --git a/src/core/lib/iomgr/resource_quota.c b/src/core/lib/iomgr/resource_quota.c
index 6c58986b534..4895e0d1c92 100644
--- a/src/core/lib/iomgr/resource_quota.c
+++ b/src/core/lib/iomgr/resource_quota.c
@@ -656,7 +656,7 @@ grpc_resource_quota *grpc_resource_quota_from_channel_args(
     if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
       if (channel_args->args[i].type == GRPC_ARG_POINTER) {
         return grpc_resource_quota_ref_internal(
-            channel_args->args[i].value.pointer.p);
+            (grpc_resource_quota *)channel_args->args[i].value.pointer.p);
       } else {
         gpr_log(GPR_DEBUG, GRPC_ARG_RESOURCE_QUOTA " should be a pointer");
       }
@@ -666,12 +666,12 @@ grpc_resource_quota *grpc_resource_quota_from_channel_args(
 }
 
 static void *rq_copy(void *rq) {
-  grpc_resource_quota_ref(rq);
+  grpc_resource_quota_ref((grpc_resource_quota *)rq);
   return rq;
 }
 
 static void rq_destroy(grpc_exec_ctx *exec_ctx, void *rq) {
-  grpc_resource_quota_unref_internal(exec_ctx, rq);
+  grpc_resource_quota_unref_internal(exec_ctx, (grpc_resource_quota *)rq);
 }
 
 static int rq_cmp(void *a, void *b) { return GPR_ICMP(a, b); }
diff --git a/src/core/lib/iomgr/socket_factory_posix.c b/src/core/lib/iomgr/socket_factory_posix.c
index 0f82dea570f..c81566575ef 100644
--- a/src/core/lib/iomgr/socket_factory_posix.c
+++ b/src/core/lib/iomgr/socket_factory_posix.c
@@ -69,11 +69,11 @@ void grpc_socket_factory_unref(grpc_socket_factory *factory) {
 }
 
 static void *socket_factory_arg_copy(void *p) {
-  return grpc_socket_factory_ref(p);
+  return grpc_socket_factory_ref((grpc_socket_factory *)p);
 }
 
 static void socket_factory_arg_destroy(grpc_exec_ctx *exec_ctx, void *p) {
-  grpc_socket_factory_unref(p);
+  grpc_socket_factory_unref((grpc_socket_factory *)p);
 }
 
 static int socket_factory_cmp(void *a, void *b) {
diff --git a/src/core/lib/iomgr/socket_mutator.c b/src/core/lib/iomgr/socket_mutator.c
index 5d6c2c400eb..300ac75b387 100644
--- a/src/core/lib/iomgr/socket_mutator.c
+++ b/src/core/lib/iomgr/socket_mutator.c
@@ -60,11 +60,11 @@ void grpc_socket_mutator_unref(grpc_socket_mutator *mutator) {
 }
 
 static void *socket_mutator_arg_copy(void *p) {
-  return grpc_socket_mutator_ref(p);
+  return grpc_socket_mutator_ref((grpc_socket_mutator *)p);
 }
 
 static void socket_mutator_arg_destroy(grpc_exec_ctx *exec_ctx, void *p) {
-  grpc_socket_mutator_unref(p);
+  grpc_socket_mutator_unref((grpc_socket_mutator *)p);
 }
 
 static int socket_mutator_cmp(void *a, void *b) {
diff --git a/src/core/lib/iomgr/timer_manager.c b/src/core/lib/iomgr/timer_manager.c
index ae2c0bf0ae6..04ca44563d6 100644
--- a/src/core/lib/iomgr/timer_manager.c
+++ b/src/core/lib/iomgr/timer_manager.c
@@ -276,7 +276,7 @@ static void timer_thread(void *completed_thread_ptr) {
       GRPC_EXEC_CTX_INITIALIZER(0, grpc_never_ready_to_finish, NULL);
   timer_main_loop(&exec_ctx);
   grpc_exec_ctx_finish(&exec_ctx);
-  timer_thread_cleanup(completed_thread_ptr);
+  timer_thread_cleanup((completed_thread *)completed_thread_ptr);
 }
 
 static void start_threads(void) {
diff --git a/src/core/lib/iomgr/udp_server.c b/src/core/lib/iomgr/udp_server.c
index 9a02c1d1bba..00b2e68bb5e 100644
--- a/src/core/lib/iomgr/udp_server.c
+++ b/src/core/lib/iomgr/udp_server.c
@@ -118,7 +118,7 @@ static grpc_socket_factory *get_socket_factory(const grpc_channel_args *args) {
     const grpc_arg *arg = grpc_channel_args_find(args, GRPC_ARG_SOCKET_FACTORY);
     if (arg) {
       GPR_ASSERT(arg->type == GRPC_ARG_POINTER);
-      return arg->value.pointer.p;
+      return (grpc_socket_factory *)arg->value.pointer.p;
     }
   }
   return NULL;
diff --git a/src/core/lib/slice/slice.c b/src/core/lib/slice/slice.c
index 321a21a10b7..0764eda0527 100644
--- a/src/core/lib/slice/slice.c
+++ b/src/core/lib/slice/slice.c
@@ -174,8 +174,8 @@ static const grpc_slice_refcount_vtable new_with_len_vtable = {
 grpc_slice grpc_slice_new_with_len(void *p, size_t len,
                                    void (*destroy)(void *, size_t)) {
   grpc_slice slice;
-  new_with_len_slice_refcount *rc =
-      gpr_malloc(sizeof(new_with_len_slice_refcount));
+  new_with_len_slice_refcount *rc = (new_with_len_slice_refcount *)gpr_malloc(
+      sizeof(new_with_len_slice_refcount));
   gpr_ref_init(&rc->refs, 1);
   rc->rc.vtable = &new_with_len_vtable;
   rc->rc.sub_refcount = &rc->rc;
diff --git a/src/core/lib/surface/call.c b/src/core/lib/surface/call.c
index 93c512df694..de5aa7b6bec 100644
--- a/src/core/lib/surface/call.c
+++ b/src/core/lib/surface/call.c
@@ -135,7 +135,7 @@ typedef struct batch_control {
 typedef struct {
   gpr_mu child_list_mu;
   grpc_call *first_child;
-} parent_call;
+} parent_call_t;
 
 typedef struct {
   grpc_call *parent;
@@ -144,7 +144,7 @@ typedef struct {
       parent->mu */
   grpc_call *sibling_next;
   grpc_call *sibling_prev;
-} child_call;
+} child_call_t;
 
 #define RECV_NONE ((gpr_atm)0)
 #define RECV_INITIAL_METADATA_FIRST ((gpr_atm)1)
@@ -157,8 +157,8 @@ struct grpc_call {
   grpc_polling_entity pollent;
   grpc_channel *channel;
   gpr_timespec start_time;
-  /* parent_call* */ gpr_atm parent_call_atm;
-  child_call *child_call;
+  /* parent_call_t* */ gpr_atm parent_call_atm;
+  child_call_t *child_call;
 
   /* client or server call */
   bool is_client;
@@ -293,32 +293,32 @@ static void post_batch_completion(grpc_exec_ctx *exec_ctx, batch_control *bctl);
 static void add_batch_error(grpc_exec_ctx *exec_ctx, batch_control *bctl,
                             grpc_error *error, bool has_cancelled);
 
-static void add_init_error(grpc_error **composite, grpc_error *new) {
-  if (new == GRPC_ERROR_NONE) return;
+static void add_init_error(grpc_error **composite, grpc_error *new_err) {
+  if (new_err == GRPC_ERROR_NONE) return;
   if (*composite == GRPC_ERROR_NONE)
     *composite = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Call creation failed");
-  *composite = grpc_error_add_child(*composite, new);
+  *composite = grpc_error_add_child(*composite, new_err);
 }
 
 void *grpc_call_arena_alloc(grpc_call *call, size_t size) {
   return gpr_arena_alloc(call->arena, size);
 }
 
-static parent_call *get_or_create_parent_call(grpc_call *call) {
-  parent_call *p = (parent_call *)gpr_atm_acq_load(&call->parent_call_atm);
+static parent_call_t *get_or_create_parent_call(grpc_call *call) {
+  parent_call_t *p = (parent_call_t *)gpr_atm_acq_load(&call->parent_call_atm);
   if (p == NULL) {
-    p = (parent_call *)gpr_arena_alloc(call->arena, sizeof(*p));
+    p = (parent_call_t *)gpr_arena_alloc(call->arena, sizeof(*p));
     gpr_mu_init(&p->child_list_mu);
     if (!gpr_atm_rel_cas(&call->parent_call_atm, (gpr_atm)NULL, (gpr_atm)p)) {
       gpr_mu_destroy(&p->child_list_mu);
-      p = (parent_call *)gpr_atm_acq_load(&call->parent_call_atm);
+      p = (parent_call_t *)gpr_atm_acq_load(&call->parent_call_atm);
     }
   }
   return p;
 }
 
-static parent_call *get_parent_call(grpc_call *call) {
-  return (parent_call *)gpr_atm_acq_load(&call->parent_call_atm);
+static parent_call_t *get_parent_call(grpc_call *call) {
+  return (parent_call_t *)gpr_atm_acq_load(&call->parent_call_atm);
 }
 
 grpc_error *grpc_call_create(grpc_exec_ctx *exec_ctx,
@@ -378,15 +378,15 @@ grpc_error *grpc_call_create(grpc_exec_ctx *exec_ctx,
   bool immediately_cancel = false;
 
   if (args->parent_call != NULL) {
-    child_call *cc = call->child_call =
-        gpr_arena_alloc(arena, sizeof(child_call));
+    child_call_t *cc = call->child_call =
+        (child_call_t *)gpr_arena_alloc(arena, sizeof(child_call_t));
     call->child_call->parent = args->parent_call;
 
     GRPC_CALL_INTERNAL_REF(args->parent_call, "child");
     GPR_ASSERT(call->is_client);
     GPR_ASSERT(!args->parent_call->is_client);
 
-    parent_call *pc = get_or_create_parent_call(args->parent_call);
+    parent_call_t *pc = get_or_create_parent_call(args->parent_call);
 
     gpr_mu_lock(&pc->child_list_mu);
 
@@ -533,7 +533,7 @@ static void destroy_call(grpc_exec_ctx *exec_ctx, void *call,
   if (c->receiving_stream != NULL) {
     grpc_byte_stream_destroy(exec_ctx, c->receiving_stream);
   }
-  parent_call *pc = get_parent_call(c);
+  parent_call_t *pc = get_parent_call(c);
   if (pc != NULL) {
     gpr_mu_destroy(&pc->child_list_mu);
   }
@@ -549,7 +549,7 @@ static void destroy_call(grpc_exec_ctx *exec_ctx, void *call,
     GRPC_CQ_INTERNAL_UNREF(exec_ctx, c->cq, "bind");
   }
 
-  get_final_status(call, set_status_value_directly, &c->final_info.final_status,
+  get_final_status(c, set_status_value_directly, &c->final_info.final_status,
                    NULL);
   c->final_info.stats.latency =
       gpr_time_sub(gpr_now(GPR_CLOCK_MONOTONIC), c->start_time);
@@ -570,14 +570,14 @@ void grpc_call_ref(grpc_call *c) { gpr_ref(&c->ext_ref); }
 void grpc_call_unref(grpc_call *c) {
   if (!gpr_unref(&c->ext_ref)) return;
 
-  child_call *cc = c->child_call;
+  child_call_t *cc = c->child_call;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   GPR_TIMER_BEGIN("grpc_call_unref", 0);
   GRPC_API_TRACE("grpc_call_unref(c=%p)", 1, (c));
 
   if (cc) {
-    parent_call *pc = get_parent_call(cc->parent);
+    parent_call_t *pc = get_parent_call(cc->parent);
     gpr_mu_lock(&pc->child_list_mu);
     if (c == pc->first_child) {
       pc->first_child = cc->sibling_next;
@@ -1309,7 +1309,7 @@ static void post_batch_completion(grpc_exec_ctx *exec_ctx,
 
     /* propagate cancellation to any interested children */
     gpr_atm_rel_store(&call->received_final_op_atm, 1);
-    parent_call *pc = get_parent_call(call);
+    parent_call_t *pc = get_parent_call(call);
     if (pc != NULL) {
       grpc_call *child;
       gpr_mu_lock(&pc->child_list_mu);
@@ -1345,7 +1345,8 @@ static void post_batch_completion(grpc_exec_ctx *exec_ctx,
   if (bctl->completion_data.notify_tag.is_closure) {
     /* unrefs bctl->error */
     bctl->call = NULL;
-    GRPC_CLOSURE_RUN(exec_ctx, bctl->completion_data.notify_tag.tag, error);
+    GRPC_CLOSURE_RUN(
+        exec_ctx, (grpc_closure *)bctl->completion_data.notify_tag.tag, error);
     GRPC_CALL_INTERNAL_UNREF(exec_ctx, call, "completion");
   } else {
     /* unrefs bctl->error */
@@ -1474,7 +1475,7 @@ static void receiving_stream_ready(grpc_exec_ctx *exec_ctx, void *bctlp,
    * acq_load is in receiving_initial_metadata_ready() */
   if (error != GRPC_ERROR_NONE || call->receiving_stream == NULL ||
       !gpr_atm_rel_cas(&call->recv_state, RECV_NONE, (gpr_atm)bctlp)) {
-    process_data_after_md(exec_ctx, bctlp);
+    process_data_after_md(exec_ctx, bctl);
   }
 }
 
@@ -1679,11 +1680,12 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
   if (nops == 0) {
     if (!is_notify_tag_closure) {
       GPR_ASSERT(grpc_cq_begin_op(call->cq, notify_tag));
-      grpc_cq_end_op(exec_ctx, call->cq, notify_tag, GRPC_ERROR_NONE,
-                     free_no_op_completion, NULL,
-                     gpr_malloc(sizeof(grpc_cq_completion)));
+      grpc_cq_end_op(
+          exec_ctx, call->cq, notify_tag, GRPC_ERROR_NONE,
+          free_no_op_completion, NULL,
+          (grpc_cq_completion *)gpr_malloc(sizeof(grpc_cq_completion)));
     } else {
-      GRPC_CLOSURE_SCHED(exec_ctx, notify_tag, GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(exec_ctx, (grpc_closure *)notify_tag, GRPC_ERROR_NONE);
     }
     error = GRPC_CALL_OK;
     goto done;