[PATCH 0/2 v2] percpu_counter: xfs requires custom compare batch size

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Hi folks,

This is v2 of the regression fix for the new generic per-cpu
superblock counter code in XFS. The problems fixed arise from using
custom batch sizes for addition and decrement exceeding the
"accurate compare" bounds in percpu_counter_compare() and hence
resulting in incorrect comparisons being made.

This regression was introduced in 4.1-rc1 and it requires a small
tweak to the percpu counter infrastructure to fix, hence the two
patches.

Comments welcome!

-Dave.

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