[rtl] FIFO writes & reads atomic?

[James Cassidy <jcassidy@nova.genesoft.com>]

I would like to make certain that I understand this issue
correctly.....

Can I assume that writes from a rt task into a fifo are
atomic from the point of view of the linux task reading the fifo?
Is this because the Linux task can't interrupt the rt task
in the middle of a write so all the data is written by the
time the Linux task gets control.

Is the reverse not true since the rt task could interrupt the Linux
task in the middle of it's write to the FIFO?  

If anyone can clarify this, I would be grateful!

Jim.

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