Merge branch 'for-linus' of git://brick.kernel.dk/data/git/linux-2.6-block

block/elevator.c

@@ -139,35 +139,16 @@ static int elevator_attach(request_queue_t *q, struct elevator_type *e,
 
 static char chosen_elevator[16];
 
-static void elevator_setup_default(void)
+static int __init elevator_setup(char *str)
 {
-	struct elevator_type *e;
-
-	/*
-	 * If default has not been set, use the compiled-in selection.
-	 */
-	if (!chosen_elevator[0])
-		strcpy(chosen_elevator, CONFIG_DEFAULT_IOSCHED);
-
 	/*
 	 * Be backwards-compatible with previous kernels, so users
 	 * won't get the wrong elevator.
 	 */
-	if (!strcmp(chosen_elevator, "as"))
+	if (!strcmp(str, "as"))
 		strcpy(chosen_elevator, "anticipatory");
-
- 	/*
- 	 * If the given scheduler is not available, fall back to the default
- 	 */
- 	if ((e = elevator_find(chosen_elevator)))
-		elevator_put(e);
 	else
- 		strcpy(chosen_elevator, CONFIG_DEFAULT_IOSCHED);
-}
-
-static int __init elevator_setup(char *str)
-{
-	strncpy(chosen_elevator, str, sizeof(chosen_elevator) - 1);
+		strncpy(chosen_elevator, str, sizeof(chosen_elevator) - 1);
 	return 0;
 }
 
@@ -184,14 +165,16 @@ int elevator_init(request_queue_t *q, char *name)
 	q->end_sector = 0;
 	q->boundary_rq = NULL;
 
-	elevator_setup_default();
+	if (name && !(e = elevator_get(name)))
+		return -EINVAL;
 
-	if (!name)
-		name = chosen_elevator;
+	if (!e && *chosen_elevator && !(e = elevator_get(chosen_elevator)))
+		printk("I/O scheduler %s not found\n", chosen_elevator);
 
-	e = elevator_get(name);
-	if (!e)
-		return -EINVAL;
+	if (!e && !(e = elevator_get(CONFIG_DEFAULT_IOSCHED))) {
+		printk("Default I/O scheduler not found, using no-op\n");
+		e = elevator_get("noop");
+	}
 
 	eq = kmalloc(sizeof(struct elevator_queue), GFP_KERNEL);
 	if (!eq) {
@@ -669,8 +652,10 @@ int elv_register(struct elevator_type *e)
 	spin_unlock_irq(&elv_list_lock);
 
 	printk(KERN_INFO "io scheduler %s registered", e->elevator_name);
-	if (!strcmp(e->elevator_name, chosen_elevator))
-		printk(" (default)");
+	if (!strcmp(e->elevator_name, chosen_elevator) ||
+			(!*chosen_elevator &&
+			 !strcmp(e->elevator_name, CONFIG_DEFAULT_IOSCHED)))
+				printk(" (default)");
 	printk("\n");
 	return 0;
 }

block/ll_rw_blk.c

@@ -304,6 +304,7 @@ static inline void rq_init(request_queue_t *q, struct request *rq)
  * blk_queue_ordered - does this queue support ordered writes
  * @q:        the request queue
  * @ordered:  one of QUEUE_ORDERED_*
+ * @prepare_flush_fn: rq setup helper for cache flush ordered writes
  *
  * Description:
  *   For journalled file systems, doing ordered writes on a commit
@@ -332,6 +333,7 @@ int blk_queue_ordered(request_queue_t *q, unsigned ordered,
 		return -EINVAL;
 	}
 
+	q->ordered = ordered;
 	q->next_ordered = ordered;
 	q->prepare_flush_fn = prepare_flush_fn;
 
@@ -662,7 +664,7 @@ EXPORT_SYMBOL(blk_queue_bounce_limit);
  *    Enables a low level driver to set an upper limit on the size of
  *    received requests.
  **/
-void blk_queue_max_sectors(request_queue_t *q, unsigned short max_sectors)
+void blk_queue_max_sectors(request_queue_t *q, unsigned int max_sectors)
 {
 	if ((max_sectors << 9) < PAGE_CACHE_SIZE) {
 		max_sectors = 1 << (PAGE_CACHE_SHIFT - 9);
@@ -2632,6 +2634,7 @@ EXPORT_SYMBOL(blk_put_request);
 /**
  * blk_end_sync_rq - executes a completion event on a request
  * @rq: request to complete
+ * @error: end io status of the request
  */
 void blk_end_sync_rq(struct request *rq, int error)
 {
@@ -3153,7 +3156,7 @@ static int __end_that_request_first(struct request *req, int uptodate,
 	if (blk_fs_request(req) && req->rq_disk) {
 		const int rw = rq_data_dir(req);
 
-		__disk_stat_add(req->rq_disk, sectors[rw], nr_bytes >> 9);
+		disk_stat_add(req->rq_disk, sectors[rw], nr_bytes >> 9);
 	}
 
 	total_bytes = bio_nbytes = 0;

drivers/scsi/libata-scsi.c

@@ -1700,6 +1700,31 @@ static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
 	return sizeof(def_rw_recovery_mpage);
 }
 
+/*
+ * We can turn this into a real blacklist if it's needed, for now just
+ * blacklist any Maxtor BANC1G10 revision firmware
+ */
+static int ata_dev_supports_fua(u16 *id)
+{
+	unsigned char model[41], fw[9];
+
+	if (!ata_id_has_fua(id))
+		return 0;
+
+	model[40] = '\0';
+	fw[8] = '\0';
+
+	ata_dev_id_string(id, model, ATA_ID_PROD_OFS, sizeof(model) - 1);
+	ata_dev_id_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw) - 1);
+
+	if (strncmp(model, "Maxtor", 6))
+		return 1;
+	if (strncmp(fw, "BANC1G10", 8))
+		return 1;
+
+	return 0; /* blacklisted */
+}
+
 /**
  *	ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
  *	@args: device IDENTIFY data / SCSI command of interest.
@@ -1797,7 +1822,7 @@ unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
 		return 0;
 
 	dpofua = 0;
-	if (ata_id_has_fua(args->id) && dev->flags & ATA_DFLAG_LBA48 &&
+	if (ata_dev_supports_fua(args->id) && dev->flags & ATA_DFLAG_LBA48 &&
 	    (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
 		dpofua = 1 << 4;
 

fs/bio.c

@@ -411,6 +411,7 @@ static int __bio_add_page(request_queue_t *q, struct bio *bio, struct page
 
 /**
  *	bio_add_pc_page	-	attempt to add page to bio
+ *	@q: the target queue
  *	@bio: destination bio
  *	@page: page to add
  *	@len: vec entry length

include/linux/blkdev.h

@@ -392,8 +392,8 @@ struct request_queue
 	unsigned int		nr_congestion_off;
 	unsigned int		nr_batching;
 
-	unsigned short		max_sectors;
-	unsigned short		max_hw_sectors;
+	unsigned int		max_sectors;
+	unsigned int		max_hw_sectors;
 	unsigned short		max_phys_segments;
 	unsigned short		max_hw_segments;
 	unsigned short		hardsect_size;
@@ -697,7 +697,7 @@ extern request_queue_t *blk_init_queue(request_fn_proc *, spinlock_t *);
 extern void blk_cleanup_queue(request_queue_t *);
 extern void blk_queue_make_request(request_queue_t *, make_request_fn *);
 extern void blk_queue_bounce_limit(request_queue_t *, u64);
-extern void blk_queue_max_sectors(request_queue_t *, unsigned short);
+extern void blk_queue_max_sectors(request_queue_t *, unsigned int);
 extern void blk_queue_max_phys_segments(request_queue_t *, unsigned short);
 extern void blk_queue_max_hw_segments(request_queue_t *, unsigned short);
 extern void blk_queue_max_segment_size(request_queue_t *, unsigned int);

include/scsi/scsi_host.h

@@ -554,7 +554,6 @@ struct Scsi_Host {
 	/*
 	 * ordered write support
 	 */
-	unsigned ordered_flush:1;
 	unsigned ordered_tag:1;
 
 	/*