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

[bugzilla-daemon@kernel.org]

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

--- Comment #26 from Alan Stern (stern@rowland.harvard.edu) ---
"u8 (*buffer)[8]" means that buffer is a pointer to an array of 8 u8's, NOT an
array of 8 pointers to u8.  The latter would be written as "u8 *(buffer[8])" or
"u8 *buffer[8]".  C's syntax is notoriously difficult to understand when
talking about arrays of pointers and pointers to arrays; you have to parse the
declaration from the inside out and you may need to know that postfix "[]" has
higher binding precedence than prefix "*".

1 and 4 don't map to anything; they are the _lengths_ of the DMA mappings. 
That is, the first mapping is 1 byte long and the second mapping is 4 bytes
long: These are lengths in bytes, not in longs.

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