scsi: sched/wait: Add wait_event_lock_irq_timeout for TASK_UNINTERRUPTIBLE usage

Short of reverting commit 00d909a10710 ("scsi: target: Make the session
shutdown code also wait for commands that are being aborted") for v4.19,
target-core needs a wait_event_t macro can be executed using
TASK_UNINTERRUPTIBLE to function correctly with existing fabric drivers that
expect to run with signals pending during session shutdown and active se_cmd
I/O quiesce.

The most notable is iscsi-target/iser-target, while ibmvscsi_tgt invokes
session shutdown logic from userspace via configfs attribute that could also
potentially have signals pending.

So go ahead and introduce wait_event_lock_irq_timeout() to achieve this, and
update + rename __wait_event_lock_irq_timeout() to make it accept 'state' as a
parameter.

Fixes: 00d909a10710 ("scsi: target: Make the session shutdown code also wait for commands that are being aborted")
Cc: <[e-mail]> # v4.19+
Cc: Bart Van Assche <[e-mail]>
Cc: Mike Christie <[e-mail]>
Cc: Hannes Reinecke <[e-mail]>
Cc: Christoph Hellwig <[e-mail]>
Cc: Sagi Grimberg <[e-mail]>
Cc: Bryant G. Ly <[e-mail]>
Cc: Peter Zijlstra (Intel) <[e-mail]>
Tested-by: Nicholas Bellinger <[e-mail]>
Signed-off-by: Nicholas Bellinger <[e-mail]>
Reviewed-by: Bryant G. Ly <[e-mail]>
Acked-by: Peter Zijlstra (Intel) <[e-mail]>
Reviewed-by: Bart Van Assche <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

include/linux/wait.h

···
 	__ret;									\
 })
 
-#define __wait_event_interruptible_lock_irq_timeout(wq_head, condition,		\
-						    lock, timeout)		\
+#define __wait_event_lock_irq_timeout(wq_head, condition, lock, timeout, state)	\
 	___wait_event(wq_head, ___wait_cond_timeout(condition),			\
-		      TASK_INTERRUPTIBLE, 0, timeout,				\
+		      state, 0, timeout,					\
 		      spin_unlock_irq(&lock);					\
 		      __ret = schedule_timeout(__ret);				\
 		      spin_lock_irq(&lock));
···
 ({										\
 	long __ret = timeout;							\
 	if (!___wait_cond_timeout(condition))					\
-		__ret = __wait_event_interruptible_lock_irq_timeout(		\
-					wq_head, condition, lock, timeout);	\
+		__ret = __wait_event_lock_irq_timeout(				\
+					wq_head, condition, lock, timeout,	\
+					TASK_INTERRUPTIBLE);			\
+	__ret;									\
+})
+
+#define wait_event_lock_irq_timeout(wq_head, condition, lock, timeout)		\
+({										\
+	long __ret = timeout;							\
+	if (!___wait_cond_timeout(condition))					\
+		__ret = __wait_event_lock_irq_timeout(				\
+					wq_head, condition, lock, timeout,	\
+					TASK_UNINTERRUPTIBLE);			\
 	__ret;									\
 })