no1wudi opened a new pull request #5913:
URL: https://github.com/apache/incubator-nuttx/pull/5913


   ## Summary
   We can't change the address enviroment before restore context
   or switch context since the syscall will trigger a exception,
   and we will save the current context in exception_common, but if the
   address enviroment changed, the context of old thread would be saved
   in wrong place.
   
   ## Impact
   RISC-V works in kernel mode
   ## Testing
   CI, may MPFS.
   


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