diff --git a/libs/binder/FdTrigger.cpp b/libs/binder/FdTrigger.cpp
index 37c21bb..a1fbbf3 100644
--- a/libs/binder/FdTrigger.cpp
+++ b/libs/binder/FdTrigger.cpp
@@ -21,13 +21,15 @@
 
 #include <poll.h>
 
-#include <android-base/scopeguard.h>
+#include <binder/Functional.h>
 
 #include "RpcState.h"
 #include "Utils.h"
 
 namespace android {
 
+using namespace android::binder::impl;
+
 std::unique_ptr<FdTrigger> FdTrigger::make() {
     auto ret = std::make_unique<FdTrigger>();
 #ifndef BINDER_RPC_SINGLE_THREADED
@@ -75,8 +77,7 @@
                         "Only one thread should be polling on Fd!");
 
     transportFd.setPollingState(true);
-    auto pollingStateGuard =
-            android::base::make_scope_guard([&]() { transportFd.setPollingState(false); });
+    auto pollingStateGuard = make_scope_guard([&]() { transportFd.setPollingState(false); });
 
     int ret = TEMP_FAILURE_RETRY(poll(pfd, countof(pfd), -1));
     if (ret < 0) {
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index 94851c6..94f3631 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -33,6 +33,7 @@
 
 #include <binder/Binder.h>
 #include <binder/BpBinder.h>
+#include <binder/Functional.h>
 #include <binder/IPCThreadState.h>
 #include <binder/Parcel.h>
 #include <binder/ProcessState.h>
@@ -40,7 +41,6 @@
 #include <binder/Status.h>
 #include <binder/TextOutput.h>
 
-#include <android-base/scopeguard.h>
 #ifndef BINDER_DISABLE_BLOB
 #include <cutils/ashmem.h>
 #endif
@@ -92,6 +92,8 @@
 
 namespace android {
 
+using namespace android::binder::impl;
+
 // many things compile this into prebuilts on the stack
 #ifdef __LP64__
 static_assert(sizeof(Parcel) == 120);
@@ -584,7 +586,7 @@
         }
 
         const size_t savedDataPos = mDataPos;
-        base::ScopeGuard scopeGuard = [&]() { mDataPos = savedDataPos; };
+        auto scopeGuard = make_scope_guard([&]() { mDataPos = savedDataPos; });
 
         rpcFields->mObjectPositions.reserve(otherRpcFields->mObjectPositions.size());
         if (otherRpcFields->mFds != nullptr) {
diff --git a/libs/binder/ProcessState.cpp b/libs/binder/ProcessState.cpp
index 7af2845..0344eb0 100644
--- a/libs/binder/ProcessState.cpp
+++ b/libs/binder/ProcessState.cpp
@@ -18,9 +18,9 @@
 
 #include <binder/ProcessState.h>
 
-#include <android-base/scopeguard.h>
 #include <android-base/strings.h>
 #include <binder/BpBinder.h>
+#include <binder/Functional.h>
 #include <binder/IPCThreadState.h>
 #include <binder/IServiceManager.h>
 #include <binder/Stability.h>
@@ -60,6 +60,8 @@
 
 namespace android {
 
+using namespace android::binder::impl;
+
 class PoolThread : public Thread
 {
 public:
@@ -430,7 +432,7 @@
 
 size_t ProcessState::getThreadPoolMaxTotalThreadCount() const {
     pthread_mutex_lock(&mThreadCountLock);
-    base::ScopeGuard detachGuard = [&]() { pthread_mutex_unlock(&mThreadCountLock); };
+    auto detachGuard = make_scope_guard([&]() { pthread_mutex_unlock(&mThreadCountLock); });
 
     if (mThreadPoolStarted) {
         LOG_ALWAYS_FATAL_IF(mKernelStartedThreads > mMaxThreads + 1,
diff --git a/libs/binder/RecordedTransaction.cpp b/libs/binder/RecordedTransaction.cpp
index 3246706..cedd3af 100644
--- a/libs/binder/RecordedTransaction.cpp
+++ b/libs/binder/RecordedTransaction.cpp
@@ -16,12 +16,13 @@
 
 #include <android-base/file.h>
 #include <android-base/logging.h>
-#include <android-base/scopeguard.h>
 #include <android-base/unique_fd.h>
+#include <binder/Functional.h>
 #include <binder/RecordedTransaction.h>
 #include <sys/mman.h>
 #include <algorithm>
 
+using namespace android::binder::impl;
 using android::Parcel;
 using android::base::borrowed_fd;
 using android::base::unique_fd;
@@ -218,7 +219,7 @@
         size_t memoryMappedSize = chunkPayloadSize + mmapPayloadStartOffset;
         void* mappedMemory =
                 mmap(NULL, memoryMappedSize, PROT_READ, MAP_SHARED, fd.get(), mmapPageAlignedStart);
-        auto mmap_guard = android::base::make_scope_guard(
+        auto mmap_guard = make_scope_guard(
                 [mappedMemory, memoryMappedSize] { munmap(mappedMemory, memoryMappedSize); });
 
         transaction_checksum_t* payloadMap =
diff --git a/libs/binder/RpcServer.cpp b/libs/binder/RpcServer.cpp
index 8037f08..1ba20b3 100644
--- a/libs/binder/RpcServer.cpp
+++ b/libs/binder/RpcServer.cpp
@@ -25,7 +25,7 @@
 #include <thread>
 #include <vector>
 
-#include <android-base/scopeguard.h>
+#include <binder/Functional.h>
 #include <binder/Parcel.h>
 #include <binder/RpcServer.h>
 #include <binder/RpcTransportRaw.h>
@@ -44,7 +44,7 @@
 
 constexpr size_t kSessionIdBytes = 32;
 
-using base::ScopeGuard;
+using namespace android::binder::impl;
 using base::unique_fd;
 
 RpcServer::RpcServer(std::unique_ptr<RpcTransportCtx> ctx) : mCtx(std::move(ctx)) {}
@@ -454,11 +454,12 @@
         LOG_ALWAYS_FATAL_IF(threadId == server->mConnectingThreads.end(),
                             "Must establish connection on owned thread");
         thisThread = std::move(threadId->second);
-        ScopeGuard detachGuard = [&]() {
+        auto detachGuardLambda = [&]() {
             thisThread.detach();
             _l.unlock();
             server->mShutdownCv.notify_all();
         };
+        auto detachGuard = make_scope_guard(std::ref(detachGuardLambda));
         server->mConnectingThreads.erase(threadId);
 
         if (status != OK || server->mShutdownTrigger->isTriggered()) {
@@ -544,7 +545,7 @@
             return;
         }
 
-        detachGuard.Disable();
+        detachGuard.release();
         session->preJoinThreadOwnership(std::move(thisThread));
     }
 
diff --git a/libs/binder/RpcSession.cpp b/libs/binder/RpcSession.cpp
index 70382c0..c895b21 100644
--- a/libs/binder/RpcSession.cpp
+++ b/libs/binder/RpcSession.cpp
@@ -26,8 +26,8 @@
 
 #include <string_view>
 
-#include <android-base/scopeguard.h>
 #include <binder/BpBinder.h>
+#include <binder/Functional.h>
 #include <binder/Parcel.h>
 #include <binder/RpcServer.h>
 #include <binder/RpcTransportRaw.h>
@@ -50,6 +50,7 @@
 
 namespace android {
 
+using namespace android::binder::impl;
 using base::unique_fd;
 
 RpcSession::RpcSession(std::unique_ptr<RpcTransportCtx> ctx) : mCtx(std::move(ctx)) {
@@ -494,7 +495,7 @@
     if (auto status = initShutdownTrigger(); status != OK) return status;
 
     auto oldProtocolVersion = mProtocolVersion;
-    auto cleanup = base::ScopeGuard([&] {
+    auto cleanup = make_scope_guard([&] {
         // if any threads are started, shut them down
         (void)shutdownAndWait(true);
 
@@ -574,7 +575,7 @@
         if (status_t status = connectAndInit(mId, true /*incoming*/); status != OK) return status;
     }
 
-    cleanup.Disable();
+    cleanup.release();
 
     return OK;
 }
diff --git a/libs/binder/RpcState.cpp b/libs/binder/RpcState.cpp
index 964a5c4..008e5d2 100644
--- a/libs/binder/RpcState.cpp
+++ b/libs/binder/RpcState.cpp
@@ -18,8 +18,8 @@
 
 #include "RpcState.h"
 
-#include <android-base/scopeguard.h>
 #include <binder/BpBinder.h>
+#include <binder/Functional.h>
 #include <binder/IPCThreadState.h>
 #include <binder/RpcServer.h>
 
@@ -38,6 +38,8 @@
 
 namespace android {
 
+using namespace android::binder::impl;
+
 #if RPC_FLAKE_PRONE
 void rpcMaybeWaitToFlake() {
     [[clang::no_destroy]] static std::random_device r;
@@ -356,7 +358,7 @@
 status_t RpcState::rpcSend(
         const sp<RpcSession::RpcConnection>& connection, const sp<RpcSession>& session,
         const char* what, iovec* iovs, int niovs,
-        const std::optional<android::base::function_ref<status_t()>>& altPoll,
+        const std::optional<SmallFunction<status_t()>>& altPoll,
         const std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds) {
     for (int i = 0; i < niovs; i++) {
         LOG_RPC_DETAIL("Sending %s (part %d of %d) on RpcTransport %p: %s",
@@ -599,25 +601,24 @@
             {const_cast<uint8_t*>(data.data()), data.dataSize()},
             objectTableSpan.toIovec(),
     };
-    if (status_t status = rpcSend(
-                connection, session, "transaction", iovs, countof(iovs),
-                [&] {
-                    if (waitUs > kWaitLogUs) {
-                        ALOGE("Cannot send command, trying to process pending refcounts. Waiting "
-                              "%zuus. Too many oneway calls?",
-                              waitUs);
-                    }
+    auto altPoll = [&] {
+        if (waitUs > kWaitLogUs) {
+            ALOGE("Cannot send command, trying to process pending refcounts. Waiting "
+                  "%zuus. Too many oneway calls?",
+                  waitUs);
+        }
 
-                    if (waitUs > 0) {
-                        usleep(waitUs);
-                        waitUs = std::min(kWaitMaxUs, waitUs * 2);
-                    } else {
-                        waitUs = 1;
-                    }
+        if (waitUs > 0) {
+            usleep(waitUs);
+            waitUs = std::min(kWaitMaxUs, waitUs * 2);
+        } else {
+            waitUs = 1;
+        }
 
-                    return drainCommands(connection, session, CommandType::CONTROL_ONLY);
-                },
-                rpcFields->mFds.get());
+        return drainCommands(connection, session, CommandType::CONTROL_ONLY);
+    };
+    if (status_t status = rpcSend(connection, session, "transaction", iovs, countof(iovs),
+                                  std::ref(altPoll), rpcFields->mFds.get());
         status != OK) {
         // rpcSend calls shutdownAndWait, so all refcounts should be reset. If we ever tolerate
         // errors here, then we may need to undo the binder-sent counts for the transaction as
@@ -808,11 +809,11 @@
         origGuard = kernelBinderState->pushGetCallingSpGuard(&spGuard);
     }
 
-    base::ScopeGuard guardUnguard = [&]() {
+    auto guardUnguard = make_scope_guard([&]() {
         if (kernelBinderState != nullptr) {
             kernelBinderState->restoreGetCallingSpGuard(origGuard);
         }
-    };
+    });
 #endif // BINDER_WITH_KERNEL_IPC
 
     switch (command.command) {
diff --git a/libs/binder/RpcState.h b/libs/binder/RpcState.h
index 1fe71a5..2a954e6 100644
--- a/libs/binder/RpcState.h
+++ b/libs/binder/RpcState.h
@@ -16,6 +16,7 @@
 #pragma once
 
 #include <android-base/unique_fd.h>
+#include <binder/Functional.h>
 #include <binder/IBinder.h>
 #include <binder/Parcel.h>
 #include <binder/RpcSession.h>
@@ -190,7 +191,7 @@
     [[nodiscard]] status_t rpcSend(
             const sp<RpcSession::RpcConnection>& connection, const sp<RpcSession>& session,
             const char* what, iovec* iovs, int niovs,
-            const std::optional<android::base::function_ref<status_t()>>& altPoll,
+            const std::optional<binder::impl::SmallFunction<status_t()>>& altPoll,
             const std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds =
                     nullptr);
     [[nodiscard]] status_t rpcRec(
diff --git a/libs/binder/RpcTransportRaw.cpp b/libs/binder/RpcTransportRaw.cpp
index c089811..ffa3151 100644
--- a/libs/binder/RpcTransportRaw.cpp
+++ b/libs/binder/RpcTransportRaw.cpp
@@ -29,6 +29,8 @@
 
 namespace android {
 
+using namespace android::binder::impl;
+
 // RpcTransport with TLS disabled.
 class RpcTransportRaw : public RpcTransport {
 public:
@@ -54,7 +56,7 @@
 
     status_t interruptableWriteFully(
             FdTrigger* fdTrigger, iovec* iovs, int niovs,
-            const std::optional<android::base::function_ref<status_t()>>& altPoll,
+            const std::optional<SmallFunction<status_t()>>& altPoll,
             const std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds)
             override {
         bool sentFds = false;
@@ -70,7 +72,7 @@
 
     status_t interruptableReadFully(
             FdTrigger* fdTrigger, iovec* iovs, int niovs,
-            const std::optional<android::base::function_ref<status_t()>>& altPoll,
+            const std::optional<SmallFunction<status_t()>>& altPoll,
             std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds) override {
         auto recv = [&](iovec* iovs, int niovs) -> ssize_t {
             return binder::os::receiveMessageFromSocket(mSocket, iovs, niovs, ancillaryFds);
diff --git a/libs/binder/RpcTransportTipcAndroid.cpp b/libs/binder/RpcTransportTipcAndroid.cpp
index 3d26a3d..188ba3b 100644
--- a/libs/binder/RpcTransportTipcAndroid.cpp
+++ b/libs/binder/RpcTransportTipcAndroid.cpp
@@ -26,6 +26,8 @@
 #include "RpcState.h"
 #include "RpcTransportUtils.h"
 
+using namespace android::binder::impl;
+
 namespace android {
 
 // RpcTransport for writing Trusty IPC clients in Android.
@@ -72,7 +74,7 @@
 
     status_t interruptableWriteFully(
             FdTrigger* fdTrigger, iovec* iovs, int niovs,
-            const std::optional<android::base::function_ref<status_t()>>& altPoll,
+            const std::optional<SmallFunction<status_t()>>& altPoll,
             const std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds)
             override {
         auto writeFn = [&](iovec* iovs, size_t niovs) -> ssize_t {
@@ -90,7 +92,7 @@
 
     status_t interruptableReadFully(
             FdTrigger* fdTrigger, iovec* iovs, int niovs,
-            const std::optional<android::base::function_ref<status_t()>>& altPoll,
+            const std::optional<SmallFunction<status_t()>>& altPoll,
             std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* /*ancillaryFds*/)
             override {
         auto readFn = [&](iovec* iovs, size_t niovs) -> ssize_t {
diff --git a/libs/binder/RpcTransportTls.cpp b/libs/binder/RpcTransportTls.cpp
index 11e080f..fef4be4 100644
--- a/libs/binder/RpcTransportTls.cpp
+++ b/libs/binder/RpcTransportTls.cpp
@@ -40,6 +40,9 @@
 #endif
 
 namespace android {
+
+using namespace android::binder::impl;
+
 namespace {
 
 // Implement BIO for socket that ignores SIGPIPE.
@@ -183,10 +186,9 @@
     // |sslError| should be from Ssl::getError().
     // If |sslError| is WANT_READ / WANT_WRITE, poll for POLLIN / POLLOUT respectively. Otherwise
     // return error. Also return error if |fdTrigger| is triggered before or during poll().
-    status_t pollForSslError(
-            const android::RpcTransportFd& fd, int sslError, FdTrigger* fdTrigger,
-            const char* fnString, int additionalEvent,
-            const std::optional<android::base::function_ref<status_t()>>& altPoll) {
+    status_t pollForSslError(const android::RpcTransportFd& fd, int sslError, FdTrigger* fdTrigger,
+                             const char* fnString, int additionalEvent,
+                             const std::optional<SmallFunction<status_t()>>& altPoll) {
         switch (sslError) {
             case SSL_ERROR_WANT_READ:
                 return handlePoll(POLLIN | additionalEvent, fd, fdTrigger, fnString, altPoll);
@@ -202,7 +204,7 @@
 
     status_t handlePoll(int event, const android::RpcTransportFd& fd, FdTrigger* fdTrigger,
                         const char* fnString,
-                        const std::optional<android::base::function_ref<status_t()>>& altPoll) {
+                        const std::optional<SmallFunction<status_t()>>& altPoll) {
         status_t ret;
         if (altPoll) {
             ret = (*altPoll)();
@@ -286,12 +288,12 @@
     status_t pollRead(void) override;
     status_t interruptableWriteFully(
             FdTrigger* fdTrigger, iovec* iovs, int niovs,
-            const std::optional<android::base::function_ref<status_t()>>& altPoll,
+            const std::optional<SmallFunction<status_t()>>& altPoll,
             const std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds)
             override;
     status_t interruptableReadFully(
             FdTrigger* fdTrigger, iovec* iovs, int niovs,
-            const std::optional<android::base::function_ref<status_t()>>& altPoll,
+            const std::optional<SmallFunction<status_t()>>& altPoll,
             std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds) override;
 
     bool isWaiting() override { return mSocket.isInPollingState(); };
@@ -322,7 +324,7 @@
 
 status_t RpcTransportTls::interruptableWriteFully(
         FdTrigger* fdTrigger, iovec* iovs, int niovs,
-        const std::optional<android::base::function_ref<status_t()>>& altPoll,
+        const std::optional<SmallFunction<status_t()>>& altPoll,
         const std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds) {
     (void)ancillaryFds;
 
@@ -368,7 +370,7 @@
 
 status_t RpcTransportTls::interruptableReadFully(
         FdTrigger* fdTrigger, iovec* iovs, int niovs,
-        const std::optional<android::base::function_ref<status_t()>>& altPoll,
+        const std::optional<SmallFunction<status_t()>>& altPoll,
         std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds) {
     (void)ancillaryFds;
 
diff --git a/libs/binder/RpcTransportUtils.h b/libs/binder/RpcTransportUtils.h
index 32f0db8..a0e502e 100644
--- a/libs/binder/RpcTransportUtils.h
+++ b/libs/binder/RpcTransportUtils.h
@@ -27,7 +27,7 @@
 status_t interruptableReadOrWrite(
         const android::RpcTransportFd& socket, FdTrigger* fdTrigger, iovec* iovs, int niovs,
         SendOrReceive sendOrReceiveFun, const char* funName, int16_t event,
-        const std::optional<android::base::function_ref<status_t()>>& altPoll) {
+        const std::optional<binder::impl::SmallFunction<status_t()>>& altPoll) {
     MAYBE_WAIT_IN_FLAKE_MODE;
 
     if (niovs < 0) {
diff --git a/libs/binder/include/binder/Functional.h b/libs/binder/include/binder/Functional.h
new file mode 100644
index 0000000..08e3b21
--- /dev/null
+++ b/libs/binder/include/binder/Functional.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <functional>
+#include <memory>
+
+namespace android::binder::impl {
+
+template <typename F>
+constexpr void assert_small_callable() {
+    // While this buffer (std::function::__func::__buf_) is an implementation detail generally not
+    // accessible to users, it's a good bet to assume its size to be around 3 pointers.
+    constexpr size_t kFunctionBufferSize = 3 * sizeof(void*);
+
+    static_assert(sizeof(F) <= kFunctionBufferSize,
+                  "Supplied callable is larger than std::function optimization buffer. "
+                  "Try using std::ref, but make sure lambda lives long enough to be called.");
+}
+
+template <typename F>
+std::unique_ptr<void, std::function<void(void*)>> make_scope_guard(F&& f) {
+    assert_small_callable<decltype(std::bind(f))>();
+    return {reinterpret_cast<void*>(true), std::bind(f)};
+}
+
+template <typename T>
+class SmallFunction : public std::function<T> {
+public:
+    template <typename F>
+    SmallFunction(F&& f) : std::function<T>(f) {
+        assert_small_callable<F>();
+    }
+};
+
+} // namespace android::binder::impl
diff --git a/libs/binder/include/binder/RpcTransport.h b/libs/binder/include/binder/RpcTransport.h
index 6db9ad9..115a173 100644
--- a/libs/binder/include/binder/RpcTransport.h
+++ b/libs/binder/include/binder/RpcTransport.h
@@ -25,10 +25,10 @@
 #include <variant>
 #include <vector>
 
-#include <android-base/function_ref.h>
 #include <android-base/unique_fd.h>
 #include <utils/Errors.h>
 
+#include <binder/Functional.h>
 #include <binder/RpcCertificateFormat.h>
 #include <binder/RpcThreads.h>
 
@@ -85,13 +85,13 @@
      *   error - interrupted (failure or trigger)
      */
     [[nodiscard]] virtual status_t interruptableWriteFully(
-            FdTrigger *fdTrigger, iovec *iovs, int niovs,
-            const std::optional<android::base::function_ref<status_t()>> &altPoll,
-            const std::vector<std::variant<base::unique_fd, base::borrowed_fd>> *ancillaryFds) = 0;
+            FdTrigger* fdTrigger, iovec* iovs, int niovs,
+            const std::optional<binder::impl::SmallFunction<status_t()>>& altPoll,
+            const std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds) = 0;
     [[nodiscard]] virtual status_t interruptableReadFully(
-            FdTrigger *fdTrigger, iovec *iovs, int niovs,
-            const std::optional<android::base::function_ref<status_t()>> &altPoll,
-            std::vector<std::variant<base::unique_fd, base::borrowed_fd>> *ancillaryFds) = 0;
+            FdTrigger* fdTrigger, iovec* iovs, int niovs,
+            const std::optional<binder::impl::SmallFunction<status_t()>>& altPoll,
+            std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds) = 0;
 
     /**
      *  Check whether any threads are blocked while polling the transport
diff --git a/libs/binder/tests/binderAllocationLimits.cpp b/libs/binder/tests/binderAllocationLimits.cpp
index 6712c9c..7e0b594 100644
--- a/libs/binder/tests/binderAllocationLimits.cpp
+++ b/libs/binder/tests/binderAllocationLimits.cpp
@@ -16,6 +16,7 @@
 
 #include <android-base/logging.h>
 #include <binder/Binder.h>
+#include <binder/Functional.h>
 #include <binder/IServiceManager.h>
 #include <binder/Parcel.h>
 #include <binder/RpcServer.h>
@@ -28,6 +29,8 @@
 #include <functional>
 #include <vector>
 
+using namespace android::binder::impl;
+
 static android::String8 gEmpty(""); // make sure first allocation from optimization runs
 
 struct DestructionAction {
@@ -172,6 +175,18 @@
     a_binder->pingBinder();
 }
 
+TEST(BinderAllocation, MakeScopeGuard) {
+    const auto m = ScopeDisallowMalloc();
+    {
+        auto guard1 = make_scope_guard([] {});
+        guard1.release();
+
+        auto guard2 = make_scope_guard([&guard1, ptr = imaginary_use] {
+            if (ptr == nullptr) guard1.release();
+        });
+    }
+}
+
 TEST(BinderAllocation, InterfaceDescriptorTransaction) {
     sp<IBinder> a_binder = GetRemoteBinder();
 
diff --git a/libs/binder/tests/binderLibTest.cpp b/libs/binder/tests/binderLibTest.cpp
index 1ca75d1..f3969f1 100644
--- a/libs/binder/tests/binderLibTest.cpp
+++ b/libs/binder/tests/binderLibTest.cpp
@@ -29,11 +29,11 @@
 
 #include <android-base/properties.h>
 #include <android-base/result-gmock.h>
-#include <android-base/scopeguard.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
 #include <binder/Binder.h>
 #include <binder/BpBinder.h>
+#include <binder/Functional.h>
 #include <binder/IBinder.h>
 #include <binder/IPCThreadState.h>
 #include <binder/IServiceManager.h>
@@ -52,6 +52,7 @@
 #define ARRAY_SIZE(array) (sizeof array / sizeof array[0])
 
 using namespace android;
+using namespace android::binder::impl;
 using namespace std::string_literals;
 using namespace std::chrono_literals;
 using android::base::testing::HasValue;
@@ -1325,7 +1326,7 @@
     ASSERT_EQ(0, ret);
 
     // Restore the original file limits when the test finishes
-    base::ScopeGuard guardUnguard([&]() { setrlimit(RLIMIT_NOFILE, &origNofile); });
+    auto guardUnguard = make_scope_guard([&]() { setrlimit(RLIMIT_NOFILE, &origNofile); });
 
     rlimit testNofile = {1024, 1024};
     ret = setrlimit(RLIMIT_NOFILE, &testNofile);
diff --git a/libs/binder/trusty/RpcTransportTipcTrusty.cpp b/libs/binder/trusty/RpcTransportTipcTrusty.cpp
index 692f82d..6bb45e2 100644
--- a/libs/binder/trusty/RpcTransportTipcTrusty.cpp
+++ b/libs/binder/trusty/RpcTransportTipcTrusty.cpp
@@ -29,6 +29,8 @@
 
 namespace android {
 
+using namespace android::binder::impl;
+
 // RpcTransport for Trusty.
 class RpcTransportTipcTrusty : public RpcTransport {
 public:
@@ -45,7 +47,7 @@
 
     status_t interruptableWriteFully(
             FdTrigger* /*fdTrigger*/, iovec* iovs, int niovs,
-            const std::optional<android::base::function_ref<status_t()>>& /*altPoll*/,
+            const std::optional<SmallFunction<status_t()>>& /*altPoll*/,
             const std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds)
             override {
         if (niovs < 0) {
@@ -115,7 +117,7 @@
 
     status_t interruptableReadFully(
             FdTrigger* /*fdTrigger*/, iovec* iovs, int niovs,
-            const std::optional<android::base::function_ref<status_t()>>& /*altPoll*/,
+            const std::optional<SmallFunction<status_t()>>& /*altPoll*/,
             std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds) override {
         if (niovs < 0) {
             return BAD_VALUE;