nuttx/sched: fix bug about task exit

[zhangyu-duck]

Summary

When a task exits, the memory should be released later, otherwise task may continues try get mutex, this moment task'state is already inactive.

nxtask_exit() ->
   nxsched_release_tcb() ->
      addrenv_leave() ->
           addrenv_destroy() ->
               kmm_free()

Impact

optimization task exit process when system enable addrenv

Testing

Just test it when task exit.

[simbit18]

Hi @zhangyu-duck, please note this error

====================================================================================
Configuration/Tool: qemu-intel64/knsh_romfs_pci
2026-01-12 14:29:09
------------------------------------------------------------------------------------
  Cleaning...
  Configuring...
  Building NuttX...
addrenv/addrenv.c: In function 'addrenv_destroy':
Error: addrenv/addrenv.c:89:3: error: implicit declaration of function 'kmm_delayfree'; did you mean 'mm_heapfree'? [-Werror=implicit-function-declaration]
   89 |   kmm_delayfree(addrenv);
      |   ^~~~~~~~~~~~~
      |   mm_heapfree
cc1: all warnings being treated as errors
make[1]: *** [Makefile:65: addrenv.o] Error 1
make[1]: Target 'libsched.a' not remade because of errors.
make: *** [tools/LibTargets.mk:71: sched/libsched.a] Error 2
make: Target 'all' not remade because of errors.
/github/workspace/sources/nuttx/tools/testbuild.sh: line 385: /github/workspace/sources/nuttx/../nuttx/nuttx.manifest: No such file or directory
  [1/1] Normalize qemu-intel64/knsh_romfs_pci
====================================================================================

[linguini1]

Testing

Just test it when task exit.

Can you please elaborate more on how you tested and verified the correct results?

[xiaoxiang781216]

Hi @zhangyu-duck, please note this error

====================================================================================
Configuration/Tool: qemu-intel64/knsh_romfs_pci
2026-01-12 14:29:09
------------------------------------------------------------------------------------
  Cleaning...
  Configuring...
  Building NuttX...
addrenv/addrenv.c: In function 'addrenv_destroy':
Error: addrenv/addrenv.c:89:3: error: implicit declaration of function 'kmm_delayfree'; did you mean 'mm_heapfree'? [-Werror=implicit-function-declaration]
   89 |   kmm_delayfree(addrenv);
      |   ^~~~~~~~~~~~~
      |   mm_heapfree
cc1: all warnings being treated as errors
make[1]: *** [Makefile:65: addrenv.o] Error 1
make[1]: Target 'libsched.a' not remade because of errors.
make: *** [tools/LibTargets.mk:71: sched/libsched.a] Error 2
make: Target 'all' not remade because of errors.
/github/workspace/sources/nuttx/tools/testbuild.sh: line 385: /github/workspace/sources/nuttx/../nuttx/nuttx.manifest: No such file or directory
  [1/1] Normalize qemu-intel64/knsh_romfs_pci
====================================================================================

@zhangyu-duck need upstream delayfree patch