The zio_taskq_dispatch() function may be called at interrupt time
and it is critical that we never sleep.
Additionally, wrap taskq_dispatch() in a while loop because it may
fail. This is non optimal but is OK for now.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Fix non-c90 compliant code, for the most part these changes
simply deal with where a particular variable is declared.
Under c90 it must alway be done at the very start of a block.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
