Shrink struct request

index 9cd2805..69215a6 100644
@@ -67,8 +67,7 @@ inline int elv_rq_merge_ok(struct reques
 	/*
 	 * same device and no special stuff set, merge is ok
 	 */
-	if (rq->rq_disk == bio->bi_bdev->bd_disk &&
-	    !rq->waiting && !rq->special)
+	if (rq->rq_disk == bio->bi_bdev->bd_disk && !rq->special)
 		return 1;
 
 	return 0;

index 4018254..0ed0e83 100644
@@ -291,7 +291,6 @@ static inline void rq_init(request_queue
 	rq->buffer = NULL;
 	rq->ref_count = 1;
 	rq->q = q;
-	rq->waiting = NULL;
 	rq->special = NULL;
 	rq->data_len = 0;
 	rq->data = NULL;

@@ -2536,10 +2535,9 @@ int blk_execute_rq(request_queue_t *q, s
 		rq->sense_len = 0;
 	}
 
-	rq->waiting = &wait;
+	rq->end_io_data = &wait;
 	blk_execute_rq_nowait(q, bd_disk, rq, at_head, blk_end_sync_rq);
 	wait_for_completion(&wait);
-	rq->waiting = NULL;
 
 	if (rq->errors)
 		err = -EIO;

@@ -2703,9 +2701,9 @@ EXPORT_SYMBOL(blk_put_request);
  */
 void blk_end_sync_rq(struct request *rq, int error)
 {
-	struct completion *waiting = rq->waiting;
+	struct completion *waiting = rq->end_io_data;
 
-	rq->waiting = NULL;
+	rq->end_io_data = NULL;
 	__blk_put_request(rq->q, rq);
 
 	/*

@@ -2756,7 +2754,7 @@ static int attempt_merge(request_queue_t
 
 	if (rq_data_dir(req) != rq_data_dir(next)
 	    || req->rq_disk != next->rq_disk
-	    || next->waiting || next->special)
+	    || next->special)
 		return 0;
 
 	/*

@@ -2841,7 +2839,6 @@ static void init_request_from_bio(struct
 	req->nr_phys_segments = bio_phys_segments(req->q, bio);
 	req->nr_hw_segments = bio_hw_segments(req->q, bio);
 	req->buffer = bio_data(bio);	/* see ->buffer comment above */
-	req->waiting = NULL;
 	req->bio = req->biotail = bio;
 	req->ioprio = bio_prio(bio);
 	req->rq_disk = bio->bi_bdev->bd_disk;

index 4cd23c3..62cc2b2 100644
@@ -3331,7 +3331,7 @@ static int DAC960_process_queue(DAC960_C
 		Command->DmaDirection = PCI_DMA_TODEVICE;
 		Command->CommandType = DAC960_WriteCommand;
 	}
-	Command->Completion = Request->waiting;
+	Command->Completion = Request->end_io_data;
 	Command->LogicalDriveNumber = (long)Request->rq_disk->private_data;
 	Command->BlockNumber = Request->sector;
 	Command->BlockCount = Request->nr_sectors;

index 2403721..87f6828 100644
@@ -722,11 +722,10 @@ static int pd_special_command(struct pd_
 	rq.rq_status = RQ_ACTIVE;
 	rq.rq_disk = disk->gd;
 	rq.ref_count = 1;
-	rq.waiting = &wait;
+	rq.end_io_data = &wait;
 	rq.end_io = blk_end_sync_rq;
 	blk_insert_request(disk->gd->queue, &rq, 0, func);
 	wait_for_completion(&wait);
-	rq.waiting = NULL;
 	if (rq.errors)
 		err = -EIO;
 	blk_put_request(&rq);

index bde2c64..d79dcd0 100644
@@ -375,7 +375,7 @@ static int pkt_generic_packet(struct pkt
 
 	rq->ref_count++;
 	rq->flags |= REQ_NOMERGE;
-	rq->waiting = &wait;
+	rq->end_io_data = &wait;
 	rq->end_io = blk_end_sync_rq;
 	elv_add_request(q, rq, ELEVATOR_INSERT_BACK, 1);
 	generic_unplug_device(q);

index fb67952..8753a50 100644
@@ -1718,7 +1718,7 @@ int ide_do_drive_cmd (ide_drive_t *drive
 	 */
 	if (must_wait) {
 		rq->ref_count++;
-		rq->waiting = &wait;
+		rq->end_io_data = &wait;
 		rq->end_io = blk_end_sync_rq;
 	}
 

@@ -1736,7 +1736,6 @@ int ide_do_drive_cmd (ide_drive_t *drive
 	err = 0;
 	if (must_wait) {
 		wait_for_completion(&wait);
-		rq->waiting = NULL;
 		if (rq->errors)
 			err = -EIO;
 

index 7067ab9..acf2e4f 100644
@@ -2773,7 +2773,7 @@ #if IDETAPE_DEBUG_BUGS
 		return;
 	}
 #endif /* IDETAPE_DEBUG_BUGS */
-	rq->waiting = &wait;
+	rq->end_io_data = &wait;
 	rq->end_io = blk_end_sync_rq;
 	spin_unlock_irq(&tape->spinlock);
 	wait_for_completion(&wait);

index ba4378f..575d3e8 100644
@@ -185,7 +185,6 @@ struct request {
 	request_queue_t *q;
 	struct request_list *rl;
 
-	struct completion *waiting;
 	void *special;
 	char *buffer;
 

@@ -204,7 +203,7 @@ struct request {
 	int retries;
 
 	/*
-	 * completion callback. end_io_data should be folded in with waiting
+	 * completion callback.
 	 */
 	rq_end_io_fn *end_io;
 	void *end_io_data;

index 0ed0e83..06b1fec 100644
@@ -452,7 +452,6 @@ static void queue_flush(request_queue_t 
 	rq->elevator_private = NULL;
 	rq->elevator_private2 = NULL;
 	rq->rq_disk = q->bar_rq.rq_disk;
-	rq->rl = NULL;
 	rq->end_io = end_io;
 	q->prepare_flush_fn(q, rq);
 

@@ -478,7 +477,6 @@ static inline struct request *start_orde
 	rq->flags |= q->ordered & QUEUE_ORDERED_FUA ? REQ_FUA : 0;
 	rq->elevator_private = NULL;
 	rq->elevator_private2 = NULL;
-	rq->rl = NULL;
 	init_request_from_bio(rq, q->orig_bar_rq->bio);
 	rq->end_io = bar_end_io;
 

@@ -1984,7 +1982,7 @@ blk_alloc_request(request_queue_t *q, in
 	 * first three bits are identical in rq->flags and bio->bi_rw,
 	 * see bio.h and blkdev.h
 	 */
-	rq->flags = rw;
+	rq->flags = rw | REQ_ALLOCED;
 
 	if (priv) {
 		if (unlikely(elv_set_request(q, rq, bio, gfp_mask))) {

@@ -2162,7 +2160,6 @@ rq_starved:
 		ioc->nr_batch_requests--;
 	
 	rq_init(q, rq);
-	rq->rl = rl;
 
 	blk_add_trace_generic(q, bio, rw, BLK_TA_GETRQ);
 out:

@@ -2646,8 +2643,6 @@ EXPORT_SYMBOL_GPL(disk_round_stats);
  */
 void __blk_put_request(request_queue_t *q, struct request *req)
 {
-	struct request_list *rl = req->rl;
-
 	if (unlikely(!q))
 		return;
 	if (unlikely(--req->ref_count))

@@ -2656,13 +2651,12 @@ void __blk_put_request(request_queue_t *
 	elv_completed_request(q, req);
 
 	req->rq_status = RQ_INACTIVE;
-	req->rl = NULL;
 
 	/*
 	 * Request may not have originated from ll_rw_blk. if not,
 	 * it didn't come out of our reserved rq pools
 	 */
-	if (rl) {
+	if (req->flags & REQ_ALLOCED) {
 		int rw = rq_data_dir(req);
 		int priv = req->flags & REQ_ELVPRIV;
 

index 575d3e8..1370687 100644
@@ -183,7 +183,6 @@ struct request {
 
 	int ref_count;
 	request_queue_t *q;
-	struct request_list *rl;
 
 	void *special;
 	char *buffer;

@@ -244,6 +243,7 @@ enum rq_flag_bits {
 	__REQ_PM_SHUTDOWN,	/* shutdown request */
 	__REQ_ORDERED_COLOR,	/* is before or after barrier */
 	__REQ_RW_SYNC,		/* request is sync (O_DIRECT) */
+	__REQ_ALLOCED,		/* request came from our alloc pool */
 	__REQ_NR_BITS,		/* stops here */
 };
 

@@ -274,6 +274,7 @@ #define REQ_PM_RESUME	(1 << __REQ_PM_RES
 #define REQ_PM_SHUTDOWN	(1 << __REQ_PM_SHUTDOWN)
 #define REQ_ORDERED_COLOR	(1 << __REQ_ORDERED_COLOR)
 #define REQ_RW_SYNC	(1 << __REQ_RW_SYNC)
+#define REQ_ALLOCED	(1 << __REQ_ALLOCED)
 
 /*
  * State information carried for REQ_PM_SUSPEND and REQ_PM_RESUME

index 3408531..baa98eb 100644
@@ -986,8 +986,6 @@ static int prepare_request(struct reques
 	__u64 offset;
 	int len;
 
-	if(req->rq_status == RQ_INACTIVE) return(1);
-
 	/* This should be impossible now */
 	if((rq_data_dir(req) == WRITE) && !dev->openflags.w){
 		printk("Write attempted on readonly ubd device %s\n",

index 06b1fec..09df381 100644
@@ -283,7 +283,6 @@ static inline void rq_init(request_queue
 	INIT_LIST_HEAD(&rq->donelist);
 
 	rq->errors = 0;
-	rq->rq_status = RQ_ACTIVE;
 	rq->bio = rq->biotail = NULL;
 	INIT_HLIST_NODE(&rq->hash);
 	RB_CLEAR_NODE(&rq->rb_node);

@@ -2650,8 +2649,6 @@ void __blk_put_request(request_queue_t *
 
 	elv_completed_request(q, req);
 
-	req->rq_status = RQ_INACTIVE;
-
 	/*
 	 * Request may not have originated from ll_rw_blk. if not,
 	 * it didn't come out of our reserved rq pools

index 87f6828..975d071 100644
@@ -719,7 +719,6 @@ static int pd_special_command(struct pd_
 
 	memset(&rq, 0, sizeof(rq));
 	rq.errors = 0;
-	rq.rq_status = RQ_ACTIVE;
 	rq.rq_disk = disk->gd;
 	rq.ref_count = 1;
 	rq.end_io_data = &wait;

index cc42e76..f2305ee 100644
@@ -319,8 +319,8 @@ #if 0
 		printk("do_fd_req: dev=%s cmd=%d sec=%ld nr_sec=%ld buf=%p\n",
 		       req->rq_disk->disk_name, req->cmd,
 		       (long)req->sector, req->nr_sectors, req->buffer);
-		printk("           rq_status=%d errors=%d current_nr_sectors=%ld\n",
-		       req->rq_status, req->errors, req->current_nr_sectors);
+		printk("           errors=%d current_nr_sectors=%ld\n",
+		       req->errors, req->current_nr_sectors);
 #endif
 
 		if (req->sector < 0 || req->sector >= fs->total_secs) {

index 89e3c2f..dfda796 100644
@@ -529,8 +529,8 @@ #if 0
 		printk("do_fd_req: dev=%s cmd=%d sec=%ld nr_sec=%ld buf=%p\n",
 		       CURRENT->rq_disk->disk_name, CURRENT->cmd,
 		       CURRENT->sector, CURRENT->nr_sectors, CURRENT->buffer);
-		printk("           rq_status=%d errors=%d current_nr_sectors=%ld\n",
-		       CURRENT->rq_status, CURRENT->errors, CURRENT->current_nr_sectors);
+		printk("           errors=%d current_nr_sectors=%ld\n",
+		      CURRENT->errors, CURRENT->current_nr_sectors);
 #endif
 
 		if (CURRENT->sector < 0 || CURRENT->sector >= fs->total_secs) {

index 66d03f2..0c5a3b2 100644
@@ -974,7 +974,6 @@ #if 0 /* broken junk, but if davem wants
 	 */
 
 	fc->rst_pkt->device->host->eh_action = &sem;
-	fc->rst_pkt->request->rq_status = RQ_SCSI_BUSY;
 
 	fc->rst_pkt->done = fcp_scsi_reset_done;
 

index adbe9f7..908f3da 100644
@@ -1281,8 +1281,7 @@ static ide_startstop_t idefloppy_do_requ
 	idefloppy_pc_t *pc;
 	unsigned long block = (unsigned long)block_s;
 
-	debug_log(KERN_INFO "rq_status: %d, dev: %s, flags: %lx, errors: %d\n",
-			rq->rq_status,
+	debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
 			rq->rq_disk ? rq->rq_disk->disk_name : "?",
 			rq->flags, rq->errors);
 	debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "

index 8753a50..f491b71 100644
@@ -1710,7 +1710,6 @@ int ide_do_drive_cmd (ide_drive_t *drive
 	int must_wait = (action == ide_wait || action == ide_head_wait);
 
 	rq->errors = 0;
-	rq->rq_status = RQ_ACTIVE;
 
 	/*
 	 * we need to hold an extra reference to request for safe inspection

index acf2e4f..e0899d6 100644
@@ -2423,8 +2423,8 @@ static ide_startstop_t idetape_do_reques
 #if IDETAPE_DEBUG_LOG
 #if 0
 	if (tape->debug_level >= 5)
-		printk(KERN_INFO "ide-tape: rq_status: %d, "
-			"dev: %s, cmd: %ld, errors: %d\n", rq->rq_status,
+		printk(KERN_INFO "ide-tape:  %d, "
+			"dev: %s, cmd: %ld, errors: %d\n",
 			 rq->rq_disk->disk_name, rq->cmd[0], rq->errors);
 #endif
 	if (tape->debug_level >= 2)

index f7b5d73..b6b223f 100644
@@ -708,7 +708,7 @@ static ide_startstop_t idescsi_issue_pc 
 static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block)
 {
 #if IDESCSI_DEBUG_LOG
-	printk (KERN_INFO "rq_status: %d, dev: %s, cmd: %x, errors: %d\n",rq->rq_status, rq->rq_disk->disk_name,rq->cmd[0],rq->errors);
+	printk (KERN_INFO "dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name,rq->cmd[0],rq->errors);
 	printk (KERN_INFO "sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",rq->sector,rq->nr_sectors,rq->current_nr_sectors);
 #endif /* IDESCSI_DEBUG_LOG */
 

index 2ab7df0..07161f3 100644
@@ -1047,7 +1047,7 @@ int scsi_device_cancel(struct scsi_devic
 
 	spin_lock_irqsave(&sdev->list_lock, flags);
 	list_for_each_entry(scmd, &sdev->cmd_list, list) {
-		if (scmd->request && scmd->request->rq_status != RQ_INACTIVE) {
+		if (scmd->request) {
 			/*
 			 * If we are unable to remove the timer, it means
 			 * that the command has already timed out or

index 1370687..73b0eeb 100644
@@ -160,8 +160,6 @@ struct request {
 
 	void *completion_data;
 
-	int rq_status;	/* should split this into a few status bits */
-	int errors;
 	struct gendisk *rq_disk;
 	unsigned long start_time;
 

@@ -179,14 +177,16 @@ struct request {
 
 	unsigned short ioprio;
 
-	int tag;
-
-	int ref_count;
 	request_queue_t *q;
 
 	void *special;
 	char *buffer;
 
+	int tag;
+	int errors;
+
+	int ref_count;
+
 	/*
 	 * when request is used as a packet command carrier
 	 */

@@ -441,9 +441,6 @@ struct request_queue
 	struct mutex		sysfs_lock;
 };
 
-#define RQ_INACTIVE		(-1)
-#define RQ_ACTIVE		1
-
 #define QUEUE_FLAG_CLUSTER	0	/* cluster several segments into 1 */
 #define QUEUE_FLAG_QUEUED	1	/* uses generic tag queueing */
 #define QUEUE_FLAG_STOPPED	2	/* queue is stopped */