[jdk18u] RFR: 8286573: Remove the unnecessary method Attr#attribTopLevel and its usage

[Guoxiong Li]

On Mon, 11 Jul 2022 09:07:12 GMT, Christoph Langer <clanger at openjdk.org> wrote:

> Hi @lgxbslgx, 18u is done. I think you can close this PR and go straight for a backport to jdk17u-dev.

I just obey the guide from the wiki [1]. From the rule below, I need to backport it to jdk18u (X == N - 1) firstly. The wiki may be outdated, so I don't know the actual steps of current backport chain.


The first step to get your bug fixed in a released JDK version is to attempt to
reproduce it with latest JDK: http://hg.openjdk.java.net/jdk/jdk/ (jdk/jdk). If that's the
case, the next step is to fix the bug in JDK head[1] and then follow the
backport-chain which is usually in this order:

 1. jdk/jdk (JDK N)
 2. jdk-updates/jdkXu (where X == N-1)
 3. jdk-updates/jdkYu (where Y is the current LTS version)
 4. jdk8u/jdk8u


[1] https://wiki.openjdk.org/display/JDKUpdates/JDK+Updates+Guidance

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PR: https://git.openjdk.org/jdk18u/pull/178