diff --git a/bootstat/bootstat.cpp b/bootstat/bootstat.cpp
index dd24aac..d08a59f 100644
--- a/bootstat/bootstat.cpp
+++ b/bootstat/bootstat.cpp
@@ -311,6 +311,7 @@
     {"shutdown,userrequested,recovery", 182},
     {"reboot,unknown[0-9]*", 183},
     {"reboot,longkey,.*", 184},
+    {"reboot,boringssl-self-check-failed", 185},
 };
 
 // Converts a string value representing the reason the system booted to an
diff --git a/init/reboot.cpp b/init/reboot.cpp
index 786a084..2cf0f5c 100644
--- a/init/reboot.cpp
+++ b/init/reboot.cpp
@@ -60,6 +60,8 @@
 
 #define PROC_SYSRQ "/proc/sysrq-trigger"
 
+using namespace std::literals;
+
 using android::base::GetBoolProperty;
 using android::base::Split;
 using android::base::Timer;
@@ -170,9 +172,23 @@
                  << stat;
 }
 
-/* Find all read+write block devices and emulated devices in /proc/mounts
- * and add them to correpsponding list.
- */
+static bool IsDataMounted() {
+    std::unique_ptr<std::FILE, int (*)(std::FILE*)> fp(setmntent("/proc/mounts", "re"), endmntent);
+    if (fp == nullptr) {
+        PLOG(ERROR) << "Failed to open /proc/mounts";
+        return false;
+    }
+    mntent* mentry;
+    while ((mentry = getmntent(fp.get())) != nullptr) {
+        if (mentry->mnt_dir == "/data"s) {
+            return true;
+        }
+    }
+    return false;
+}
+
+// Find all read+write block devices and emulated devices in /proc/mounts and add them to
+// the correpsponding list.
 static bool FindPartitionsToUmount(std::vector<MountEntry>* blockDevPartitions,
                                    std::vector<MountEntry>* emulatedPartitions, bool dump) {
     std::unique_ptr<std::FILE, int (*)(std::FILE*)> fp(setmntent("/proc/mounts", "re"), endmntent);
@@ -295,12 +311,15 @@
             LOG(ERROR) << "Reboot thread timed out";
 
             if (android::base::GetBoolProperty("ro.debuggable", false) == true) {
-                LOG(INFO) << "Try to dump init process call trace:";
-                const char* vdc_argv[] = {"/system/bin/debuggerd", "-b", "1"};
-                int status;
-                android_fork_execvp_ext(arraysize(vdc_argv), (char**)vdc_argv, &status, true,
-                                        LOG_KLOG, true, nullptr, nullptr, 0);
-
+                if (false) {
+                    // SEPolicy will block debuggerd from running and this is intentional.
+                    // But these lines are left to be enabled during debugging.
+                    LOG(INFO) << "Try to dump init process call trace:";
+                    const char* vdc_argv[] = {"/system/bin/debuggerd", "-b", "1"};
+                    int status;
+                    android_fork_execvp_ext(arraysize(vdc_argv), (char**)vdc_argv, &status, true,
+                                            LOG_KLOG, true, nullptr, nullptr, 0);
+                }
                 LOG(INFO) << "Show stack for all active CPU:";
                 WriteStringToFile("l", PROC_SYSRQ);
 
@@ -436,6 +455,14 @@
     Timer t;
     LOG(INFO) << "Reboot start, reason: " << reason << ", rebootTarget: " << rebootTarget;
 
+    // If /data isn't mounted then we can skip the extra reboot steps below, since we don't need to
+    // worry about unmounting it.
+    if (!IsDataMounted()) {
+        sync();
+        RebootSystem(cmd, rebootTarget);
+        abort();
+    }
+
     // Ensure last reboot reason is reduced to canonical
     // alias reported in bootloader or system boot reason.
     size_t skip = 0;
diff --git a/libnativeloader/Android.bp b/libnativeloader/Android.bp
index b860db9..939bdd7 100644
--- a/libnativeloader/Android.bp
+++ b/libnativeloader/Android.bp
@@ -63,14 +63,6 @@
     export_include_dirs: ["include"],
 }
 
-// TODO(jiyong) Remove this when its use in the internal master is
-// switched to libnativeloader-headers
-cc_library_headers {
-    name: "libnativeloader-dummy-headers",
-    host_supported: true,
-    export_include_dirs: ["include"],
-}
-
 cc_test {
     name: "libnativeloader_test",
     srcs: [
diff --git a/libutils/Timers.cpp b/libutils/Timers.cpp
index c3641ef..1172ae7 100644
--- a/libutils/Timers.cpp
+++ b/libutils/Timers.cpp
@@ -22,7 +22,8 @@
 #include <limits.h>
 #include <time.h>
 
-#if defined(__ANDROID__)
+// host linux support requires Linux 2.6.39+
+#if defined(__linux__)
 nsecs_t systemTime(int clock)
 {
     static const clockid_t clocks[] = {
@@ -41,8 +42,7 @@
 nsecs_t systemTime(int /*clock*/)
 {
     // Clock support varies widely across hosts. Mac OS doesn't support
-    // posix clocks, older glibcs don't support CLOCK_BOOTTIME and Windows
-    // is windows.
+    // CLOCK_BOOTTIME, and Windows is windows.
     struct timeval t;
     t.tv_sec = t.tv_usec = 0;
     gettimeofday(&t, nullptr);
diff --git a/libutils/include/utils/ByteOrder.h b/libutils/include/utils/ByteOrder.h
index 44ea13d..9b940e6 100644
--- a/libutils/include/utils/ByteOrder.h
+++ b/libutils/include/utils/ByteOrder.h
@@ -14,10 +14,17 @@
  * limitations under the License.
  */
 
-//
+#pragma once
 
-#ifndef _LIBS_UTILS_BYTE_ORDER_H
-#define _LIBS_UTILS_BYTE_ORDER_H
+/*
+ * If you're looking for a portable <endian.h> that's available on Android,
+ * Linux, macOS, and Windows, see <android-base/endian.h> instead.
+ *
+ * Nothing in this file is useful because all supported Android ABIs are
+ * little-endian and all our code that runs on the host assumes that the host is
+ * also little-endian. What pretense at big-endian support exists is completely
+ * untested and unlikely to actually work.
+ */
 
 #include <stdint.h>
 #include <sys/types.h>
@@ -27,55 +34,12 @@
 #include <netinet/in.h>
 #endif
 
-/*
- * These macros are like the hton/ntoh byte swapping macros,
- * except they allow you to swap to and from the "device" byte
- * order.  The device byte order is the endianness of the target
- * device -- for the ARM CPUs we use today, this is little endian.
- *
- * Note that the byte swapping functions have not been optimized
- * much; performance is currently not an issue for them since the
- * intent is to allow us to avoid byte swapping on the device.
- */
+/* TODO: move this cruft to frameworks/. */
 
-static inline uint32_t android_swap_long(uint32_t v)
-{
-    return (v<<24) | ((v<<8)&0x00FF0000) | ((v>>8)&0x0000FF00) | (v>>24);
-}
+#define dtohl(x) (x)
+#define dtohs(x) (x)
+#define htodl(x) (x)
+#define htods(x) (x)
 
-static inline uint16_t android_swap_short(uint16_t v)
-{
-    return (v<<8) | (v>>8);
-}
-
-#define DEVICE_BYTE_ORDER LITTLE_ENDIAN
-
-#if BYTE_ORDER == DEVICE_BYTE_ORDER
-
-#define	dtohl(x)	(x)
-#define	dtohs(x)	(x)
-#define	htodl(x)	(x)
-#define	htods(x)	(x)
-
-#else
-
-#define	dtohl(x)	(android_swap_long(x))
-#define	dtohs(x)	(android_swap_short(x))
-#define	htodl(x)	(android_swap_long(x))
-#define	htods(x)	(android_swap_short(x))
-
-#endif
-
-#if BYTE_ORDER == LITTLE_ENDIAN
 #define fromlel(x) (x)
-#define fromles(x) (x)
 #define tolel(x) (x)
-#define toles(x) (x)
-#else
-#define fromlel(x) (android_swap_long(x))
-#define fromles(x) (android_swap_short(x))
-#define tolel(x) (android_swap_long(x))
-#define toles(x) (android_swap_short(x))
-#endif
-
-#endif // _LIBS_UTILS_BYTE_ORDER_H
diff --git a/rootdir/etc/ld.config.legacy.txt b/rootdir/etc/ld.config.legacy.txt
index e598f05..c47b7f6 100644
--- a/rootdir/etc/ld.config.legacy.txt
+++ b/rootdir/etc/ld.config.legacy.txt
@@ -80,16 +80,14 @@
 # This namespace exposes externally accessible libraries from the Runtime APEX.
 # Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
 ###############################################################################
+# TODO(b/139408016): Rename this namespace to "art".
 namespace.runtime.isolated = true
 # Visible to allow links to be created at runtime, e.g. through
 # android_link_namespaces in libnativeloader.
 namespace.runtime.visible = true
 
-# TODO(b/139408016): Split the namespaces for the ART and Runtime APEXes
-namespace.runtime.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.search.paths += /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.asan.search.paths += /apex/com.android.runtime/${LIB}
+namespace.runtime.search.paths = /apex/com.android.art/${LIB}
+namespace.runtime.asan.search.paths = /apex/com.android.art/${LIB}
 namespace.runtime.links = default
 # Need allow_all_shared_libs because libart.so can dlopen oat files in
 # /system/framework and /data.
diff --git a/rootdir/etc/ld.config.txt b/rootdir/etc/ld.config.txt
index e1da587..5b92d48 100644
--- a/rootdir/etc/ld.config.txt
+++ b/rootdir/etc/ld.config.txt
@@ -161,16 +161,14 @@
 # This namespace exposes externally accessible libraries from the Runtime APEX.
 # Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
 ###############################################################################
+# TODO(b/139408016): Rename this namespace to "art".
 namespace.runtime.isolated = true
 # Visible to allow links to be created at runtime, e.g. through
 # android_link_namespaces in libnativeloader.
 namespace.runtime.visible = true
 
-# TODO(b/139408016): Split the namespaces for the ART and Runtime APEXes
-namespace.runtime.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.search.paths += /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.asan.search.paths += /apex/com.android.runtime/${LIB}
+namespace.runtime.search.paths = /apex/com.android.art/${LIB}
+namespace.runtime.asan.search.paths = /apex/com.android.art/${LIB}
 namespace.runtime.links = default
 # Need allow_all_shared_libs because libart.so can dlopen oat files in
 # /system/framework and /data.
@@ -490,13 +488,11 @@
 # This namespace exposes externally accessible libraries from the Runtime APEX.
 # Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
 ###############################################################################
+# TODO(b/139408016): Rename this namespace to "art".
 namespace.runtime.isolated = true
 
-# TODO(b/139408016): Split the namespaces for the ART and Runtime APEXes
-namespace.runtime.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.search.paths += /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.asan.search.paths += /apex/com.android.runtime/${LIB}
+namespace.runtime.search.paths = /apex/com.android.art/${LIB}
+namespace.runtime.asan.search.paths = /apex/com.android.art/${LIB}
 namespace.runtime.links = system
 # TODO(b/130340935): Use a dynamically created linker namespace similar to
 # classloader-namespace for oat files, and tighten this up.
@@ -697,16 +693,14 @@
 # This namespace exposes externally accessible libraries from the Runtime APEX.
 # Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
 ###############################################################################
+# TODO(b/139408016): Rename this namespace to "art".
 namespace.runtime.isolated = true
 # Visible to allow links to be created at runtime, e.g. through
 # android_link_namespaces in libnativeloader.
 namespace.runtime.visible = true
 
-# TODO(b/139408016): Split the namespaces for the ART and Runtime APEXes
-namespace.runtime.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.search.paths += /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.asan.search.paths += /apex/com.android.runtime/${LIB}
+namespace.runtime.search.paths = /apex/com.android.art/${LIB}
+namespace.runtime.asan.search.paths = /apex/com.android.art/${LIB}
 namespace.runtime.links = default
 # TODO(b/130340935): Use a dynamically created linker namespace similar to
 # classloader-namespace for oat files, and tighten this up.
diff --git a/rootdir/etc/ld.config.vndk_lite.txt b/rootdir/etc/ld.config.vndk_lite.txt
index 4beabd6..8a27c7b 100644
--- a/rootdir/etc/ld.config.vndk_lite.txt
+++ b/rootdir/etc/ld.config.vndk_lite.txt
@@ -100,16 +100,14 @@
 # This namespace pulls in externally accessible libs from the Runtime APEX.
 # Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
 ###############################################################################
+# TODO(b/139408016): Rename this namespace to "art".
 namespace.runtime.isolated = true
 # Visible to allow links to be created at runtime, e.g. through
 # android_link_namespaces in libnativeloader.
 namespace.runtime.visible = true
 
-# TODO(b/139408016): Split the namespaces for the ART and Runtime APEXes
-namespace.runtime.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.search.paths += /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.asan.search.paths += /apex/com.android.runtime/${LIB}
+namespace.runtime.search.paths = /apex/com.android.art/${LIB}
+namespace.runtime.asan.search.paths = /apex/com.android.art/${LIB}
 namespace.runtime.links = default
 # Need allow_all_shared_libs because libart.so can dlopen oat files in
 # /system/framework and /data.
@@ -420,13 +418,11 @@
 # This namespace exposes externally accessible libraries from the Runtime APEX.
 # Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
 ###############################################################################
+# TODO(b/139408016): Rename this namespace to "art".
 namespace.runtime.isolated = true
 
-# TODO(b/139408016): Split the namespaces for the ART and Runtime APEXes
-namespace.runtime.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.search.paths += /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.asan.search.paths += /apex/com.android.runtime/${LIB}
+namespace.runtime.search.paths = /apex/com.android.art/${LIB}
+namespace.runtime.asan.search.paths = /apex/com.android.art/${LIB}
 namespace.runtime.links = default
 # TODO(b/130340935): Use a dynamically created linker namespace similar to
 # classloader-namespace for oat files, and tighten this up.
@@ -504,16 +500,14 @@
 # This namespace exposes externally accessible libraries from the Runtime APEX.
 # Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
 ###############################################################################
+# TODO(b/139408016): Rename this namespace to "art".
 namespace.runtime.isolated = true
 # Visible to allow links to be created at runtime, e.g. through
 # android_link_namespaces in libnativeloader.
 namespace.runtime.visible = true
 
-# TODO(b/139408016): Split the namespaces for the ART and Runtime APEXes
-namespace.runtime.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.search.paths += /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths  = /apex/com.android.art/${LIB}
-namespace.runtime.asan.search.paths += /apex/com.android.runtime/${LIB}
+namespace.runtime.search.paths = /apex/com.android.art/${LIB}
+namespace.runtime.asan.search.paths = /apex/com.android.art/${LIB}
 namespace.runtime.links = default
 # TODO(b/130340935): Use a dynamically created linker namespace similar to
 # classloader-namespace for oat files, and tighten this up.
diff --git a/rootdir/init.rc b/rootdir/init.rc
index a15b501..d5fed5a 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -68,19 +68,19 @@
 
 service boringssl_self_test32 /system/bin/boringssl_self_test32
     setenv BORINGSSL_SELF_TEST_CREATE_FLAG true # Any nonempty value counts as true
-    reboot_on_failure reboot,bootloader,boringssl-self-check-failed
+    reboot_on_failure reboot,boringssl-self-check-failed
 
 service boringssl_self_test64 /system/bin/boringssl_self_test64
     setenv BORINGSSL_SELF_TEST_CREATE_FLAG true # Any nonempty value counts as true
-    reboot_on_failure reboot,bootloader,boringssl-self-check-failed
+    reboot_on_failure reboot,boringssl-self-check-failed
 
 service boringssl_self_test_apex32 /apex/com.android.conscrypt/bin/boringssl_self_test32
     setenv BORINGSSL_SELF_TEST_CREATE_FLAG true # Any nonempty value counts as true
-    reboot_on_failure reboot,bootloader,boringssl-self-check-failed
+    reboot_on_failure reboot,boringssl-self-check-failed
 
 service boringssl_self_test_apex64 /apex/com.android.conscrypt/bin/boringssl_self_test64
     setenv BORINGSSL_SELF_TEST_CREATE_FLAG true # Any nonempty value counts as true
-    reboot_on_failure reboot,bootloader,boringssl-self-check-failed
+    reboot_on_failure reboot,boringssl-self-check-failed
 
 on init
     sysclktz 0