imxrt_serial: use small lock in arch/arm/src/imxrt/imxrt_serial.c

[hujun260]

Summary

imxrt_serial: use small lock in arch/arm/src/imxrt/imxrt_serial.c

Impact

imxrt_serial

Testing

ci ostest

[nuttxpr]

[Experimental Bot, please feedback here]

No, this PR does not fully meet the NuttX requirements. The provided information is far too brief. Here's a breakdown of what's missing:

• Summary: Lacks crucial details. Why is this change necessary? What problem does it solve? How does using a "small lock" work and what are the benefits? Mentioning the specific file changed is helpful, but not sufficient. Issue references are missing.

• Impact: Simply stating "imxrt_serial" is not an impact assessment. All the yes/no questions are unanswered. This section needs significant expansion to explain how the change affects users, the build process, hardware, documentation, security, and compatibility. Even if the answer to many of these is "NO," it's crucial to explicitly state that and briefly justify why.

• Testing: "ci ostest" is insufficient. While CI testing is important, the PR should provide specific details on the local testing performed. What host operating system, compiler, and target hardware were used? The "Testing logs before change" and "Testing logs after change" sections are empty. These should contain actual log output demonstrating the issue before the change and the improvement after the change. Ideally, there would be some evidence of improved performance or reduced resource usage if a "small lock" is intended to optimize something.

In short, the PR needs much more detail to be acceptable. It needs to clearly explain the motivation, implementation details, potential impact, and provide concrete evidence of testing and verification.

[xiaoxiang781216]

move to imxrt_uart_s

[hujun260]

done