From: Christoph Hellwig <hch@infradead.org>
Date: Mon, 28 Apr 2008 02:29:35 -0400

quoted text
> Is a WARN_ON the right check for user-triggerable behaviour?  I think
> a normal rate-limited printk with a descriptive text would be better.

I used WARN_ON_ONCE, which I think is sufficient.
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