[issue1331] libthread_xu errno issue fix

[Alex Hornung (via DragonFly issue tracker)]

Alex Hornung <ahornung at gmail.com> added the comment:

Simon Schubert found a bug today which causes an undesired value in
errno in a threaded context if a umtx syscall also returns an error.


This is the new fix:

http://gitweb.dragonflybsd.org/~alexh/dragonfly.git/commit/ac9d39b6181ccc289f198a8e80fae624aa7d3b2a

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status: unread -> chatting

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