diff --git a/adb/adb_utils.cpp b/adb/adb_utils.cpp
index 69603455a..9791769a4 100644
--- a/adb/adb_utils.cpp
+++ b/adb/adb_utils.cpp
@@ -312,7 +312,7 @@ std::string adb_get_android_dir_path() {
     std::string android_dir = user_dir + OS_PATH_SEPARATOR + ".android";
     struct stat buf;
     if (stat(android_dir.c_str(), &buf) == -1) {
-        if (adb_mkdir(android_dir.c_str(), 0750) == -1) {
+        if (adb_mkdir(android_dir, 0750) == -1) {
             PLOG(FATAL) << "Cannot mkdir '" << android_dir << "'";
         }
     }
diff --git a/adb/bugreport_test.cpp b/adb/bugreport_test.cpp
index 72ca59aa7..a6be20368 100644
--- a/adb/bugreport_test.cpp
+++ b/adb/bugreport_test.cpp
@@ -136,7 +136,7 @@ class BugreportTest : public ::testing::Test {
 
     void ExpectBugreportzVersion(const std::string& version) {
         EXPECT_CALL(br_, SendShellCommand("bugreportz -v", false, _))
-            .WillOnce(DoAll(WithArg<2>(WriteOnStderr(version.c_str())),
+            .WillOnce(DoAll(WithArg<2>(WriteOnStderr(version)),
                             WithArg<2>(ReturnCallbackDone(0))));
     }
 
diff --git a/adb/client/auth.cpp b/adb/client/auth.cpp
index bcb829b1c..3eee426c8 100644
--- a/adb/client/auth.cpp
+++ b/adb/client/auth.cpp
@@ -416,7 +416,7 @@ void adb_auth_init() {
 #endif
 
     for (const std::string& path : key_paths) {
-        load_keys(path.c_str());
+        load_keys(path);
     }
 }
 
diff --git a/adb/client/file_sync_client.cpp b/adb/client/file_sync_client.cpp
index 7e470e1fc..5d1023845 100644
--- a/adb/client/file_sync_client.cpp
+++ b/adb/client/file_sync_client.cpp
@@ -1012,7 +1012,7 @@ bool do_sync_push(const std::vector<const char*>& srcs, const char* dst, bool sy
                 dst_dir.append(android::base::Basename(src_path));
             }
 
-            success &= copy_local_dir_remote(sc, src_path, dst_dir.c_str(), sync, false);
+            success &= copy_local_dir_remote(sc, src_path, dst_dir, sync, false);
             continue;
         } else if (!should_push_file(st.st_mode)) {
             sc.Warning("skipping special file '%s' (mode = 0o%o)", src_path, st.st_mode);
@@ -1128,7 +1128,7 @@ static bool copy_remote_dir_local(SyncConnection& sc, std::string rpath,
     // Recursively build the list of files to copy.
     sc.Printf("pull: building file list...");
     std::vector<copyinfo> file_list;
-    if (!remote_build_list(sc, &file_list, rpath.c_str(), lpath.c_str())) {
+    if (!remote_build_list(sc, &file_list, rpath, lpath)) {
         return false;
     }
 
@@ -1240,7 +1240,7 @@ bool do_sync_pull(const std::vector<const char*>& srcs, const char* dst,
                 dst_dir.append(android::base::Basename(src_path));
             }
 
-            success &= copy_remote_dir_local(sc, src_path, dst_dir.c_str(), copy_attrs);
+            success &= copy_remote_dir_local(sc, src_path, dst_dir, copy_attrs);
             continue;
         } else if (!should_pull_file(src_st.st_mode)) {
             sc.Warning("skipping special file '%s' (mode = 0o%o)", src_path, src_st.st_mode);
diff --git a/adb/daemon/file_sync_service.cpp b/adb/daemon/file_sync_service.cpp
index 29bd798d4..e82a51f2b 100644
--- a/adb/daemon/file_sync_service.cpp
+++ b/adb/daemon/file_sync_service.cpp
@@ -422,7 +422,7 @@ static bool do_send(int s, const std::string& spec, std::vector<char>& buffer) {
     bool result;
     uint32_t timestamp;
     if (S_ISLNK(mode)) {
-        result = handle_send_link(s, path.c_str(), &timestamp, buffer);
+        result = handle_send_link(s, path, &timestamp, buffer);
     } else {
         // Copy user permission bits to "group" and "other" permissions.
         mode &= 0777;
diff --git a/adb/services.cpp b/adb/services.cpp
index 80f9f7925..cf346bade 100644
--- a/adb/services.cpp
+++ b/adb/services.cpp
@@ -188,7 +188,7 @@ static void connect_service(unique_fd fd, std::string host) {
     if (!strncmp(host.c_str(), "emu:", 4)) {
         connect_emulator(host.c_str() + 4, &response);
     } else {
-        connect_device(host.c_str(), &response);
+        connect_device(host, &response);
     }
 
     // Send response for emulator and device
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index 4cdd8bcd9..827db9671 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -1805,7 +1805,7 @@ int FastBootTool::Main(int argc, char* argv[]) {
             auto format = [&](const std::string& partition) {
                 fb_perform_format(partition, 0, type_override, size_override, "");
             };
-            do_for_partitions(partition.c_str(), slot_override, format, true);
+            do_for_partitions(partition, slot_override, format, true);
         } else if (command == "signature") {
             std::string filename = next_arg(&args);
             std::vector<char> data;
@@ -1876,7 +1876,7 @@ int FastBootTool::Main(int argc, char* argv[]) {
                 }
                 do_flash(partition.c_str(), fname.c_str());
             };
-            do_for_partitions(pname.c_str(), slot_override, flash, true);
+            do_for_partitions(pname, slot_override, flash, true);
         } else if (command == "flash:raw") {
             std::string partition = next_arg(&args);
             std::string kernel = next_arg(&args);