RFR: 8313368: (fc) FileChannel.size returns 0 on block special files [v2]

[Alan Bateman]

On Tue, 1 Aug 2023 17:48:59 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> Reinstate header files so that `BLKGETSIZE64` is defined on Linux.
>
> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8313368: Change conditional compilation check; modify existing test to be manual

Marked as reviewed by alanb (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/15092#pullrequestreview-1557531939