diff --git a/libraries/AP_HAL_Linux/AnalogIn_IIO.cpp b/libraries/AP_HAL_Linux/AnalogIn_IIO.cpp
index b011c902b2..5ad670791c 100644
--- a/libraries/AP_HAL_Linux/AnalogIn_IIO.cpp
+++ b/libraries/AP_HAL_Linux/AnalogIn_IIO.cpp
@@ -16,11 +16,11 @@ const char* AnalogSource_IIO::analog_sources[] = {
 };
 
 AnalogSource_IIO::AnalogSource_IIO(int16_t pin, float initial_value, float voltage_scaling) :
-    _pin(pin),
     _value(initial_value),
-    _voltage_scaling(voltage_scaling),
     _sum_value(0),
+    _voltage_scaling(voltage_scaling),
     _sum_count(0),
+    _pin(pin),
     _pin_fd(-1)
 {
     init_pins();
diff --git a/libraries/AP_HAL_Linux/CANSocketIface.h b/libraries/AP_HAL_Linux/CANSocketIface.h
index 1e4d01a7b4..32bdcbf3d3 100644
--- a/libraries/AP_HAL_Linux/CANSocketIface.h
+++ b/libraries/AP_HAL_Linux/CANSocketIface.h
@@ -58,8 +58,8 @@ class CANIface: public AP_HAL::CANIface {
 public:
     CANIface(int index)
       : _self_index(index)
-      , _frames_in_socket_tx_queue(0)
       , _max_frames_in_socket_tx_queue(2)
+      , _frames_in_socket_tx_queue(0)
     { }
 
     ~CANIface() { }
diff --git a/libraries/AP_HAL_Linux/CameraSensor_Mt9v117.cpp b/libraries/AP_HAL_Linux/CameraSensor_Mt9v117.cpp
index 32fe9ed363..ba53789c8a 100644
--- a/libraries/AP_HAL_Linux/CameraSensor_Mt9v117.cpp
+++ b/libraries/AP_HAL_Linux/CameraSensor_Mt9v117.cpp
@@ -113,8 +113,8 @@ CameraSensor_Mt9v117::CameraSensor_Mt9v117(const char *device_path,
                                            uint16_t nrst_gpio, uint32_t clock_freq)
     : CameraSensor(device_path)
     , _dev(std::move(dev))
-    , _nrst_gpio(nrst_gpio)
     , _clock_freq(clock_freq)
+    , _nrst_gpio(nrst_gpio)
 {
     if (!_dev) {
         AP_HAL::panic("Could not find I2C bus for CameraSensor_Mt9v117");
diff --git a/libraries/AP_HAL_Linux/GPIO_Sysfs.cpp b/libraries/AP_HAL_Linux/GPIO_Sysfs.cpp
index 34db881593..9e38e53ccf 100644
--- a/libraries/AP_HAL_Linux/GPIO_Sysfs.cpp
+++ b/libraries/AP_HAL_Linux/GPIO_Sysfs.cpp
@@ -36,8 +36,8 @@ union gpio_params {
 #define GPIO_PATH_MAX (sizeof(GPIO_BASE_PATH) + sizeof(gpio_params) - 1)
 
 DigitalSource_Sysfs::DigitalSource_Sysfs(unsigned pin, int value_fd)
-    : _pin(pin)
-    , _value_fd(value_fd)
+    : _value_fd(value_fd)
+    , _pin(pin)
 {
 }
 
diff --git a/libraries/AP_HAL_Linux/PWM_Sysfs.cpp b/libraries/AP_HAL_Linux/PWM_Sysfs.cpp
index 680f82ec51..9c7997e242 100644
--- a/libraries/AP_HAL_Linux/PWM_Sysfs.cpp
+++ b/libraries/AP_HAL_Linux/PWM_Sysfs.cpp
@@ -33,12 +33,12 @@ namespace Linux {
 PWM_Sysfs_Base::PWM_Sysfs_Base(char* export_path, char* polarity_path,
                           char* enable_path, char* duty_path,
                           char* period_path, uint8_t channel)
-    : _export_path(export_path)
+    : _channel(channel)
+    , _export_path(export_path)
     , _polarity_path(polarity_path)
     , _enable_path(enable_path)
     , _duty_path(duty_path)
     , _period_path(period_path)
-    , _channel(channel)
 {
 }
 
diff --git a/libraries/AP_HAL_Linux/RCInput_RPI.h b/libraries/AP_HAL_Linux/RCInput_RPI.h
index 8d398eec5f..84ca95295b 100644
--- a/libraries/AP_HAL_Linux/RCInput_RPI.h
+++ b/libraries/AP_HAL_Linux/RCInput_RPI.h
@@ -116,7 +116,8 @@ private:
             prev_tick(0), delta_time(0),
             width_s0(0), width_s1(0),
             curr_signal(0), last_signal(0),
-            enable_pin(0), state(RCIN_RPI_INITIAL_STATE)
+            state(RCIN_RPI_INITIAL_STATE),
+            enable_pin(0)
         {}
 
         uint64_t prev_tick;
diff --git a/libraries/AP_HAL_Linux/RCOutput_PCA9685.cpp b/libraries/AP_HAL_Linux/RCOutput_PCA9685.cpp
index 4c88645963..3b8a4877b3 100644
--- a/libraries/AP_HAL_Linux/RCOutput_PCA9685.cpp
+++ b/libraries/AP_HAL_Linux/RCOutput_PCA9685.cpp
@@ -62,8 +62,8 @@ RCOutput_PCA9685::RCOutput_PCA9685(AP_HAL::OwnPtr<AP_HAL::I2CDevice> dev,
                                    uint32_t external_clock,
                                    uint8_t channel_offset,
                                    int16_t oe_pin_number) :
-    _dev(std::move(dev)),
     _enable_pin(nullptr),
+    _dev(std::move(dev)),
     _frequency(50),
     _pulses_buffer(NEW_NOTHROW uint16_t[PWM_CHAN_COUNT - channel_offset]),
     _external_clock(external_clock),