RFR: 8285745: Re-examine PushbackInputStream mark/reset

[Brian Burkhalter]

On Wed, 27 Apr 2022 20:10:03 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

> Please review this request to remove the `synchronized` keyword from the `mark(int)` and `reset()` methods of `java.io.PushbackInputStream`.

Please see also https://github.com/openjdk/jdk/pull/8309.

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PR: https://git.openjdk.java.net/jdk/pull/8433