I'm scratching my head wondering about this `data_ptr' thing. Is
it a disk offset? Is it really a pointer to kernel memory?
According to this code it is indeed a kernel pointer, but it then
gets stuffed into an unsigned long (wtf?) and then passed to the
<reviewer throws in the towel on this part of the code>
<wonders what the -1 does>
<goes to the btrfs_lookup_xattr() definition site>
<towel goes flying again>
<gets interested in btrfs_path.reada>
<greps for a while>
It's snowing towels in here!
-- Andrew Morton
I had this strange dream that google airlines was bombing my house
-- Chris Mason
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