New code for 6.3-rc1:

 * Twiddle a string copy function in the xattr code.
 * Eliminate repeated boxing and unboxing of log item parameters.
 * Clean up some confusing variable names in the log item code.
 * Fix a deadlock when doing unwritten extent conversion that causes a
   bmbt split when there are sustained memory shortages and the worker
   pool runs out of worker threads.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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