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The bio completion handlers can be run in any context, e.g. when using
the old ide driver they run in hardirq context with irqs disabled so
lockdep rightfully warns about using write_lock_irq useage in these
handlers.
This patch switches clear_extent_bit and set_extent_bit to
write_lock_irqsave to fix this problem.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Yan Zheng noticed that set_extent_bit was exiting too early when there
was a hole in the map. The fix is to reorder the tests to check for the
hole first.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
