• Fix a bug in pthread_condwait that was improperly initializing the mutex.

• nucleo-f429zi port
• boards/z80/ez80/z20x: z20x board support and bootloader
• New architectural support: ez80f92
• Flat address x86_64 port of Nuttx
• Support to run NuttX on ESP32 QEMU
• Initial support for Sipeed Maix Bit board with Kendryte K210 processor
• Add initial support for Kendryte K210 processor in SMP mode
• S32K: Add support for NXP drone boards

• i.MX RT: FLEXIO clock config logic. 
• Fix the clock configuration for the imxrt family
• i.MX RT: Add ability to run from OCRAM 
• SAMA5D27 peripheral support - USB Host working 
• boards/z80/ez80/z20x/: Add W25 bootloader
•  i.MX RT: Add USB Device support
• stm32, stm32f7, stm32h7 add SPI DMATHRESHOLD
• boards/sim: Add a TCP loopback test.
• Improve sim timer
• 64-bit modules on macOS simulator
• boards/z80/ez80/z20x: Add XTP2046 SPI support; add timer support
• RX65N RTC Driver added
• NXP Freedom K28F Board SD-Card support
•  stm32h7: support SDRAM via FMC peripheral
•  lm3s6965-ek: Add PROTECTED support
• STM32H7: Added IWDG and WWDG, power management (sleep/stop/standby), WKUP pin configuration
• SAMV71: add read UID implementation and move flash functions to RAM
• IMXRT: Fix interrupts storm (serial & I2C)
• Various fixes and cosmetic changes to the CxD56xx architecture
• Fix SiFive FE310 related code (comments, improve serial irq handling, initial int status)
  
• Implement QSPI for SPI32H7
• Improvements for the nRF52 port: I2C, SPI, GPIO support
• Updates for LPC17xx serial
• Adds basic support for Microchip SAM E54 Xplained Pro board
• Adds an Ethernet driver for the SAME5x family (based on the SAMA5 GMAC driver)
  
• Add CDC ECM Ethernet over USB 2.0 High Speed (tested on SAMA5D36-Xplained board)
• Sim: Reimplement sim uart on top of serial driver framework
• NXP S32K1XX peripheral clock fixes
• Fix syscall stack alignment on armv7-m
• Fix flash_erase(page) when page >= 256 for STM32L4 family

• Add on IP and TCP socket options needed by iperf3

• Add support for asynchronous Netlink responses

• Add support for MAP_PRIVATE

• Make PIC32MZ DMA interrupt event configurable

• Monitor TCP_POLL/TCP_NEWDATA/TCP_BACKLOG per the request like UDP counterpart

• Add partial support for the NETLINK poll() operation.

• Add serial DMA support for STM32F7

• Split serial RX/TX DMA

• Minor design improvement to TCP delayed ACKs

• Add AM335x Clock Configuration

• Add I2C support for AM335x

• Add configuration to fine tune LPI2C Timeout for iMXRT

• Add CAN support to AM335x

• Add I2C support to STM32F0/L0/G0

• Kinetis LPC SDCard improvements

• netlink minor fixes

• mm_heap supports BUILD_FLAT, other minor fixes

List removed architectures

• Adds driver for the ADS7828 I2C analog to digital converter
• driver/ioexpander: New driver for PCA9538 I2C I/O expander
• New driver type for battery monitor ICs.
• Driver for the BQ769x0 battery monitor IC.
• Add Support for Quectel EC20 4G LTE Module USB CDC/ACM
• DNS Dual Host support (what is this? No PR description)

• Update all the drivers to check return value of nxsem_wait_uninterruptible()
• MCP9844 shutdown mode support
• fcntl: add O_CLOEXEC flag, add O_CLOEXEC/FD_CLOEXEC support
• NFS: Support IPv4 and TCP
• CDC-ECM Ethernet over USB 2.0 HS
• Network Loopback Driver: Add a configuration option to control packet size312 - net/ioctl: add FIONBIO support
• net/socket: add MSG_DONTWAIT support
• NET: Improve TUN and SLIP, refine Control+C Handling in Telnet
• smartfs improvements (Handling duplicate sectors, Support fsck to check and repair the smartfs file system, Recover SPI Flash from initial error state.)
  
• Various fixes for USBDEV driver: Remove unnecessary reset logic,  Descriptor type mismatch fix when dual speed is enabled, Fix invalid/unsupported command processing, Fix string ID calculation.
  
• Netlink sockets may be set to non-blocking
• In tcp_close_eventhandler(), check TCP_NEWDATA flag before process and don't eat the flag for TCP_DISCONN_EVENTS
• Handle size zero in umm_malloc.c and umm_realloc.c, which causes a system freeze in kernel mode
• Fix/Refine CTRL+C to work on telnet
• Replace the busy polling with work_queue in the ethernet driver of simulator
• Fix of faulty TCP sequence increments
• Fix Xtensa's SMP support to follow same logic from other SMP archs
• Fixed compilation issue with poll fds notification
• Fix netdb to query IPv4 and IPv6 addresses regardless the server address type
• Report POLLHUP and POLLERR in 'revents' regardless the requested 'events' set
• In tcp_close_eventhandler(), check TCP_NEWDATA flag before process and don't eat the flag for TCP_DISCONN_EVENTS

• Extend netutils and netinit to work with only Netlink sockets enabled
• Add getprime program to check multi-thread performance
• Improve zmodem send performance
• Add simple HTS221, LSM303 and LSM6DSL examples
• Improve to gs2200m wiki performance
• Improve telnet server and enable it to listen on both IPv4 and IPv6
• Improve ntpclient logic
• Improve wapi to save configuration to file system
• Improve wapi to skip associate if ssid is invalid
• Improve cmd_nfsmount to use IPv4 and IPv6
• Improve ostest for SMP and non-SMP configurations
• Improve UDP to avoid using standard symbols
• Improve dhcpd to include configurable timeout and retry count

• Correct format when printing ARP tablet entries
• Ensure /bin/ping and ping work at the same time.
• Correct backward conditional logic in dhcpd_leaseexpired().
• Fix several problems on ftpd
• Fix dhcpd issue reported on Issue #17
• Fix sendmail example to run on a local SMTP
• Fix buffer overflow on netlib
• Fix compile errors in loopback mode of the tcpblaster
• Fix stack corruption in ELF task test
• Fix errors in NoBlockRecv and BlockRecv tests of usrsocktest
• Fix ipforward IP Header issue for IPv4
• Fix wrongly swapped parity options of CU program
• Fix slcd to avoid using priv->fd before initializing it
• Fix (tcp,udp)blaster to build on macOS
• Correct the buffer type of base64 program