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See PR-5496, git commit 855534deef50e1e9c957eb32a7b15497d1bfd34a.

Refactored Arch Headers

PR-5720 has refactored architectural headers affecting all ARM platforms: arm_arch.h has been removed and its contents merged into arm_internal.h. Previously, most low-level modules in arch/arm/* and boards/arm/* needed to include both headers. Following the refactor, only arm_internal.h is needed.

All boards in the NuttX tree have been updated.

NuttX users developing their own custom boards will need to remove any #include "arm_arch.h" and (if necessary), #include "arm_internal.h" instead.

See PR-5720, git commit 54e630e14d7e32d6f81ae79d4e5df3d2fa787ef0.

Known Problems In This Release

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