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What's New In This Release

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Changes to Core OS

Bug Fixes

 * [#7493](https://github.com/apache/incubator-nuttx/pull/7493) sched: clock: adjust clock function to support tick
 * [#7200](https://github.com/apache/incubator-nuttx/pull/7200) sched: clock: Rename g_system_timer to g_system_ticks
 * [#6936](https://github.com/apache/incubator-nuttx/pull/6936) sched: cpuload: fix cpuload error
 * [#7318](https://github.com/apache/incubator-nuttx/pull/7318) sched: env: Skip the envirnment variable duplication of kernel thread
 * [#7490](https://github.com/apache/incubator-nuttx/pull/7490) sched: getprioritymax: handle invaild policy as posix style
 * [#7563](https://github.com/apache/incubator-nuttx/pull/7563) sched: group_setupidlefiles: fall back to /dev/null if /dev/console is disabled
 * [#7235](https://github.com/apache/incubator-nuttx/pull/7235) sched: irq: Refactor irq_spinlock.c
 * [#7469](https://github.com/apache/incubator-nuttx/pull/7469) sched: mutex: NXMUTEX_INITIALIZER should enable priority inheritance
 * [#7095](https://github.com/apache/incubator-nuttx/pull/7095) sched: mqueue: fix resource leak in mq_timedsend()
 * [#7088](https://github.com/apache/incubator-nuttx/pull/7088) sched: msgq: add support of System V message queue
 * [#7838](https://github.com/apache/incubator-nuttx/pull/7838) sched: nx_bringup: Set the initial stack size in kernel build as well
 * [#7492](https://github.com/apache/incubator-nuttx/pull/7492) sched: posix/timer: handle invaild timerid correctly
 * [#6905](https://github.com/apache/incubator-nuttx/pull/6905) sched: prctl: Replace strncpy with strlcpy for safety
 * [#7267](https://github.com/apache/incubator-nuttx/pull/7267) sched: sem: don't clear waitobj when do sem recover
 * [#6967](https://github.com/apache/incubator-nuttx/pull/6967) sched: semaphore: add sem_count temporary variable to improve performance
 * [#6318](https://github.com/apache/incubator-nuttx/pull/6318) sched: semaphore: fix priority boost restoration for priority inheritance
 * [#7456](https://github.com/apache/incubator-nuttx/pull/7456) sched: semaphore: add the wdog judge before cancel
 * [#7583](https://github.com/apache/incubator-nuttx/pull/7583) sched: signal: fix sigtimedwait error handling
 * [#7327](https://github.com/apache/incubator-nuttx/pull/7327) sched: spawn: Add the dummy task_spawnattr_xxxstackyyy in the kernel mode
 * [#7485](https://github.com/apache/incubator-nuttx/pull/7485) sched: spawn: Rename task_spawnattr_[get|set]stack[size|addr] to posix_spawnattr_[get|set]stack[size|addr]
 * [#7597](https://github.com/apache/incubator-nuttx/pull/7597) sched: task: task_getpid: getpid should return process id not thread id
 * [#7018](https://github.com/apache/incubator-nuttx/pull/7018) sched: wqueue: change single queue to double queue to improve speed
 * [#6996](https://github.com/apache/incubator-nuttx/pull/6996) sched: wqueue: fix visual studio Compiler Error C2059
 * [#7477](https://github.com/apache/incubator-nuttx/pull/7477) sched: change the type of tg_joinlock, mm_lock and md_lock from sem_t to mutex_t
 * [#7019](https://github.com/apache/incubator-nuttx/pull/7019) sched: fix corner case wd_cancel assert crash
 * [#7062](https://github.com/apache/incubator-nuttx/pull/7062) sched: fix kasan report error when open CONFIG_DEBUG_MM
 * [#6948](https://github.com/apache/incubator-nuttx/pull/6948) sched: fix macro "SCHED_NOTE_PRINTF" requires 3 argumnets, but only 1 given
 * [#7322](https://github.com/apache/incubator-nuttx/pull/7322) sched: fix runtime error UBSan(division by zero)
 * [#7792](https://github.com/apache/incubator-nuttx/pull/7792) sched: Improve UBSan configuraion
 * [#7159](https://github.com/apache/incubator-nuttx/pull/7159) sched: merge waitsem and msgwaitq
 * [#7791](https://github.com/apache/incubator-nuttx/pull/7791) sched: move _assert to kernel space.
 * [#7837](https://github.com/apache/incubator-nuttx/pull/7837) sched: move sched_note.c to drivers/note
 * [#7810](https://github.com/apache/incubator-nuttx/pull/7810) sched: pthread_mutex_timedlock never returns EINTR
 * [#7816](https://github.com/apache/incubator-nuttx/pull/7816) sched: Remove intr and EINTR from pthread mutex 
 * [#7276](https://github.com/apache/incubator-nuttx/pull/7276) sched: Minor fix backtrace config
 * [#7459](https://github.com/apache/incubator-nuttx/pull/7459) sched: use pid to check idle task
 * [#7196](https://github.com/apache/incubator-nuttx/pull/7196) sched: Optimize sched_note_begin/end
 * [#7471](https://github.com/apache/incubator-nuttx/pull/7471) sched: Remove the unnecessary (FAR sem_t *) cast
 * [#6862](https://github.com/apache/incubator-nuttx/pull/6862) sched: Remove the unnecessary weak_function
 * [#6958](https://github.com/apache/incubator-nuttx/pull/6958) sched: Remove volatile from the task list
 * [#7808](https://github.com/apache/incubator-nuttx/pull/7808) sched: move common assert logic together.
 * [#6987](https://github.com/apache/incubator-nuttx/pull/6987) sched: semaphore and mqueue task list optimize
 * [#7339](https://github.com/apache/incubator-nuttx/pull/7339) sched: Simplify HAVE_GROUP_MEMBERS logic
 * [#6866](https://github.com/apache/incubator-nuttx/pull/6866) sched: Simplify the cpuload process
 * [#7511](https://github.com/apache/incubator-nuttx/pull/7511) sched: remove sched_continue, merge code
 * [#7599](https://github.com/apache/incubator-nuttx/pull/7599) sched: remove nxsched_remove_blocked from up_unblock_task
 * [#7364](https://github.com/apache/incubator-nuttx/pull/7364) sched: Support the stack size and address for posix_spawn and kernel mode
 * [#7415](https://github.com/apache/incubator-nuttx/pull/7415) sched: Pass idle thread envionment variables to the child task through copy
 * [#7454](https://github.com/apache/incubator-nuttx/pull/7454) sched: remove the unused function nx_wait and nx_waitid
 * [#7605](https://github.com/apache/incubator-nuttx/pull/7605) sched: mqueue: make mqueue and mqueue sysv can disable separately
 * [#7656](https://github.com/apache/incubator-nuttx/pull/7656) sched: merge up_block_task and up_unblock_task
 * [#7065](https://github.com/apache/incubator-nuttx/pull/7065) sched: wqueue: fix race-condition on work_queue

 * [#7815](https://github.com/apache/incubator-nuttx/pull/7815) mm: iob: reserved bytes should be updated after each iteration
 * [#7714](https://github.com/apache/incubator-nuttx/pull/7714) mm: iob: new function iob_reserve() to adjust headroom offset
 * [#6836](https://github.com/apache/incubator-nuttx/pull/6836) mm: iob: Remove iob_user_e enum and related code
 * [#6834](https://github.com/apache/incubator-nuttx/pull/6834) mm: iob: modify iob to support header padding and alignment features
 * [#7066](https://github.com/apache/incubator-nuttx/pull/7066) mm: kasan: use init value to avoid kasan used before bss clear
 * [#7509](https://github.com/apache/incubator-nuttx/pull/7509) mm: kasan: fix kasan race-condition #
 * [#6804](https://github.com/apache/incubator-nuttx/pull/6804) mm: mempool: support mempool and show mempool info in procfs
 * [#7450](https://github.com/apache/incubator-nuttx/pull/7450) mm: mempool: support multiple-mempool and enhance mempool
 * [#7581](https://github.com/apache/incubator-nuttx/pull/7581) mm: mm_heap: Change TCB_FLAG_HEAPCHECK to TCB_FLAG_HEAP_CHECK
 * [#7449](https://github.com/apache/incubator-nuttx/pull/7449) mm: mm_heap: optimize MM_XX_SHIFT define
 * [#7495](https://github.com/apache/incubator-nuttx/pull/7495) mm: mm_heap: add debug assert to check the alignment problem
 * [#6928](https://github.com/apache/incubator-nuttx/pull/6928) mm: mm_heap: Avoid assertion violation in case of kmm_free(NULL)
 * [#7662](https://github.com/apache/incubator-nuttx/pull/7662) mm: mm_size2ndx: using flsl to calculate the ndx
 * [#7618](https://github.com/apache/incubator-nuttx/pull/7618) mm: shm: Implement a generic utility API for creating / destroying shm mappings
 * [#7607](https://github.com/apache/incubator-nuttx/pull/7607) mm: shm: Implement shmem drivers for risc-v target
 * [#7134](https://github.com/apache/incubator-nuttx/pull/7134) mm: ubsan: UBSan option should be turned on if SIM_UBSAN enabled
 * [#7301](https://github.com/apache/incubator-nuttx/pull/7301) mm: ubsan: Ubsan
 * [#7285](https://github.com/apache/incubator-nuttx/pull/7285) mm: ubsan: Fixed undefined behavior in UBSan.
 * [#6986](https://github.com/apache/incubator-nuttx/pull/6986) mm: ubsan: Allow custom the sanitizer in Kconfig
 * [#6881](https://github.com/apache/incubator-nuttx/pull/6881) mm: ubsan: debug: Introduce portion of UBSan
 * [#6979](https://github.com/apache/incubator-nuttx/pull/6979) mm: umm_heap: Do not register Umem if CONFIG_BUILD_KERNEL=y
 * [#6995](https://github.com/apache/incubator-nuttx/pull/6995) mm: Check the function result with suitable macro.
 * [#7457](https://github.com/apache/incubator-nuttx/pull/7457) mm: Check for memory leaks in tasks
 * [#6999](https://github.com/apache/incubator-nuttx/pull/6999) mm: fix runtime error by UBSan #
 * [#7536](https://github.com/apache/incubator-nuttx/pull/7536) mm: Refine mm Kconfig
 * [#7551](https://github.com/apache/incubator-nuttx/pull/7551) mm: Remove the unused macro MM_IS_ALLOCATED
 * [#7540](https://github.com/apache/incubator-nuttx/pull/7540) mm: Restore the return type of mm_lock from bool to int

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Changes to the Build System

Bug Fixes

 * [#7419](https://github.com/apache/incubator-nuttx/pull/7419) Makefile: Remove INCDIROPT
 * [#7118](https://github.com/apache/incubator-nuttx/pull/7118) Remove EXPERIMENTAL from some long existent config
 * [#7043](https://github.com/apache/incubator-nuttx/pull/7043) Kconfig: EXPERIMENTAL: Add help text and change prompt label
 * [#7052](https://github.com/apache/incubator-nuttx/pull/7052) Config.mk: Add COMPILEZIG
 * [#6885](https://github.com/apache/incubator-nuttx/pull/6885) Make the full image instrumentation configurable
 * [#7272](https://github.com/apache/incubator-nuttx/pull/7272) tools: Added Kconfig option for ccache.
 * [#7048](https://github.com/apache/incubator-nuttx/pull/7048) tools: Optimizing mkallsyms scripts with python
 * [#7103](https://github.com/apache/incubator-nuttx/pull/7103) tools: configure.sh: Update USAGE for custom out-of-tree boards
 * [#7081](https://github.com/apache/incubator-nuttx/pull/7081) tools: b16.c: Fix usage text
 * [#7080](https://github.com/apache/incubator-nuttx/pull/7080) tools: pic32: Add description, fix nxstyle, fix typos
 * [#7076](https://github.com/apache/incubator-nuttx/pull/7076) tools: Remove duplicate calls and optimize compilation speed
 * [#7569](https://github.com/apache/incubator-nuttx/pull/7569) tools: Win.mk Fix error in Windows native build
 * [#7556](https://github.com/apache/incubator-nuttx/pull/7556) tools: incdir.bat
 * [#7849](https://github.com/apache/incubator-nuttx/pull/7849) tools: Fix ccache: error: Could not find compiler "x86_64-elf-gcc" in PATH
 * [#7552](https://github.com/apache/incubator-nuttx/pull/7552) tools: ignore errors when indir does not exist
 * [#7658](https://github.com/apache/incubator-nuttx/pull/7658) tools: Config: Fix error caused by double quotation in Windows native build
 * [#7357](https://github.com/apache/incubator-nuttx/pull/7357) tools: Fix an issue that libboard.a is not exported
 * [#7686](https://github.com/apache/incubator-nuttx/pull/7686) tools: nuttx-gdbinit: restore the context at the end of each command
 * [#7594](https://github.com/apache/incubator-nuttx/pull/7594) tools: configure.bat: Update USAGE
 * [#7765](https://github.com/apache/incubator-nuttx/pull/7765) tools: define.bat: sync design of define.bat with define.sh to uniform usage
 * [#7572](https://github.com/apache/incubator-nuttx/pull/7572) tools: Fix various error in Windows native build
 * [#7560](https://github.com/apache/incubator-nuttx/pull/7560) tools: Fix some buid error
 * [#7529](https://github.com/apache/incubator-nuttx/pull/7529) tools: Fix some configure error in Windows native build

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