Andreas Kling f2846e8e08 Kernel: Allow short writes to DoubleBuffer ...

DoubleBuffer is the internal buffer for things like TTY, FIFO, sockets,
etc. If you try to write more than the buffer can hold, it will now
do a short write instead of asserting.

This is likely to expose issues at higher levels, and we'll have to
deal with them as they are discovered.

2020-02-01 10:56:17 +01:00

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