[Bug 215740] kernel warning: DMA-API: xhci_hcd: cacheline tracking EEXIST, overlapping mappings aren't supported

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https://bugzilla.kernel.org/show_bug.cgi?id=215740

--- Comment #5 from Christoph Hellwig (hch@xxxxxx) ---
On Thu, Mar 31, 2022 at 09:41:25AM +0200, Thorsten Leemhuis wrote:
> Hey Christoph, Marek, Greg!
> 
> Below warning was reported to bugzilla.kernel.org more than a week ago;
> to quote the important parts here:

The warning is from a new debug check added in 5.14 under a debug
config option.  So while the USB maintainers should look into fixing it
I don't think it is a regression in that traditional sense of the word.

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