NeilBrown 2c58f06e6f md/raid5: separate large if clause out of fetch_block().
fetch_block() has a very large and hard to read 'if' condition.

Separate it into its own function so that it can be
made more readable.

Signed-off-by: NeilBrown <neilb@suse.de>
2015-02-04 08:35:51 +11:00
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