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>