1192800187 -0400
committer Chris Mason <chris.mason@oracle.com> 1222355037 -0400

Btrfs: KM_IRQ0 usage in end_io handling

endio handling is typically called with interrupts disabled, but can
also be called with it enabled. So save interrupts before using KM_IRQ0
to be completely safe.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
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