Apply a nice fix caught by Ricardo,

* spl-04-fix-taskq-spinlock-lockup.patch
Fixes a deadlock in the BIO completion handler, due to the taskq code
prematurely re-enabling interrupts when another spinlock had disabled
them in the IDE IRQ handler.



git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@161 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c

include/sys/taskq.h

@@ -61,6 +61,7 @@ typedef void (task_func_t)(void *);
 
 typedef struct taskq {
         spinlock_t              tq_lock;       /* protects taskq_t */
+        unsigned long           tq_lock_flags; /* interrupt state */
         struct task_struct      **tq_threads;  /* thread pointers */
 	const char              *tq_name;      /* taskq name */
         int                     tq_nactive;    /* # of active threads */