X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=block%2Fblk-core.c;h=4afb39c823396ccec50c3ded2673d22ed0b07cf3;hb=6728cb0e6343d4068ccec13f07212e6382d3ff33;hp=55cf293d907dd0901d4cbf5e0d3279936bd2a2ea;hpb=22b132102f1540dd40f3e41df88796829b685f1a;p=linux-2.6-omap-h63xx.git diff --git a/block/blk-core.c b/block/blk-core.c index 55cf293d907..4afb39c8233 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -3,7 +3,8 @@ * Copyright (C) 1994, Karl Keyte: Added support for disk statistics * Elevator latency, (C) 2000 Andrea Arcangeli SuSE * Queue request tables / lock, selectable elevator, Jens Axboe - * kernel-doc documentation started by NeilBrown - July2000 + * kernel-doc documentation started by NeilBrown + * - July2000 * bio rewrite, highmem i/o, etc, Jens Axboe - may 2001 */ @@ -42,7 +43,7 @@ struct kmem_cache *request_cachep; /* * For queue allocation */ -struct kmem_cache *blk_requestq_cachep = NULL; +struct kmem_cache *blk_requestq_cachep; /* * Controlling structure to kblockd @@ -137,7 +138,7 @@ static void req_bio_endio(struct request *rq, struct bio *bio, error = -EIO; if (unlikely(nbytes > bio->bi_size)) { - printk("%s: want %u bytes done, only %u left\n", + printk(KERN_ERR "%s: want %u bytes done, %u left\n", __FUNCTION__, nbytes, bio->bi_size); nbytes = bio->bi_size; } @@ -161,23 +162,26 @@ void blk_dump_rq_flags(struct request *rq, char *msg) { int bit; - printk("%s: dev %s: type=%x, flags=%x\n", msg, + printk(KERN_INFO "%s: dev %s: type=%x, flags=%x\n", msg, rq->rq_disk ? rq->rq_disk->disk_name : "?", rq->cmd_type, rq->cmd_flags); - printk("\nsector %llu, nr/cnr %lu/%u\n", (unsigned long long)rq->sector, - rq->nr_sectors, - rq->current_nr_sectors); - printk("bio %p, biotail %p, buffer %p, data %p, len %u\n", rq->bio, rq->biotail, rq->buffer, rq->data, rq->data_len); + printk(KERN_INFO " sector %llu, nr/cnr %lu/%u\n", + (unsigned long long)rq->sector, + rq->nr_sectors, + rq->current_nr_sectors); + printk(KERN_INFO " bio %p, biotail %p, buffer %p, data %p, len %u\n", + rq->bio, rq->biotail, + rq->buffer, rq->data, + rq->data_len); if (blk_pc_request(rq)) { - printk("cdb: "); + printk(KERN_INFO " cdb: "); for (bit = 0; bit < sizeof(rq->cmd); bit++) printk("%02x ", rq->cmd[bit]); printk("\n"); } } - EXPORT_SYMBOL(blk_dump_rq_flags); /* @@ -204,7 +208,6 @@ void blk_plug_device(struct request_queue *q) blk_add_trace_generic(q, NULL, 0, BLK_TA_PLUG); } } - EXPORT_SYMBOL(blk_plug_device); /* @@ -221,7 +224,6 @@ int blk_remove_plug(struct request_queue *q) del_timer(&q->unplug_timer); return 1; } - EXPORT_SYMBOL(blk_remove_plug); /* @@ -328,7 +330,6 @@ void blk_start_queue(struct request_queue *q) kblockd_schedule_work(&q->unplug_work); } } - EXPORT_SYMBOL(blk_start_queue); /** @@ -408,7 +409,7 @@ void blk_put_queue(struct request_queue *q) } EXPORT_SYMBOL(blk_put_queue); -void blk_cleanup_queue(struct request_queue * q) +void blk_cleanup_queue(struct request_queue *q) { mutex_lock(&q->sysfs_lock); set_bit(QUEUE_FLAG_DEAD, &q->queue_flags); @@ -419,7 +420,6 @@ void blk_cleanup_queue(struct request_queue * q) blk_put_queue(q); } - EXPORT_SYMBOL(blk_cleanup_queue); static int blk_init_free_list(struct request_queue *q) @@ -575,7 +575,6 @@ int blk_get_queue(struct request_queue *q) return 1; } - EXPORT_SYMBOL(blk_get_queue); static inline void blk_free_request(struct request_queue *q, struct request *rq) @@ -774,7 +773,7 @@ rq_starved: */ if (ioc_batching(q, ioc)) ioc->nr_batch_requests--; - + rq_init(q, rq); blk_add_trace_generic(q, bio, rw, BLK_TA_GETRQ); @@ -888,7 +887,6 @@ void blk_requeue_request(struct request_queue *q, struct request *rq) elv_requeue_request(q, rq); } - EXPORT_SYMBOL(blk_requeue_request); /** @@ -939,7 +937,6 @@ void blk_insert_request(struct request_queue *q, struct request *rq, blk_start_queueing(q); spin_unlock_irqrestore(q->queue_lock, flags); } - EXPORT_SYMBOL(blk_insert_request); /* @@ -947,7 +944,7 @@ EXPORT_SYMBOL(blk_insert_request); * queue lock is held and interrupts disabled, as we muck with the * request queue list. */ -static inline void add_request(struct request_queue * q, struct request * req) +static inline void add_request(struct request_queue *q, struct request *req) { drive_stat_acct(req, 1); @@ -957,7 +954,7 @@ static inline void add_request(struct request_queue * q, struct request * req) */ __elv_add_request(q, req, ELEVATOR_INSERT_SORT, 0); } - + /* * disk_round_stats() - Round off the performance stats on a struct * disk_stats. @@ -987,7 +984,6 @@ void disk_round_stats(struct gendisk *disk) } disk->stamp = now; } - EXPORT_SYMBOL_GPL(disk_round_stats); /* @@ -1017,7 +1013,6 @@ void __blk_put_request(struct request_queue *q, struct request *req) freed_request(q, rw, priv); } } - EXPORT_SYMBOL_GPL(__blk_put_request); void blk_put_request(struct request *req) @@ -1035,7 +1030,6 @@ void blk_put_request(struct request *req) spin_unlock_irqrestore(q->queue_lock, flags); } } - EXPORT_SYMBOL(blk_put_request); void init_request_from_bio(struct request *req, struct bio *bio) @@ -1096,53 +1090,53 @@ static int __make_request(struct request_queue *q, struct bio *bio) el_ret = elv_merge(q, &req, bio); switch (el_ret) { - case ELEVATOR_BACK_MERGE: - BUG_ON(!rq_mergeable(req)); + case ELEVATOR_BACK_MERGE: + BUG_ON(!rq_mergeable(req)); - if (!ll_back_merge_fn(q, req, bio)) - break; + if (!ll_back_merge_fn(q, req, bio)) + break; - blk_add_trace_bio(q, bio, BLK_TA_BACKMERGE); + blk_add_trace_bio(q, bio, BLK_TA_BACKMERGE); - req->biotail->bi_next = bio; - req->biotail = bio; - req->nr_sectors = req->hard_nr_sectors += nr_sectors; - req->ioprio = ioprio_best(req->ioprio, prio); - drive_stat_acct(req, 0); - if (!attempt_back_merge(q, req)) - elv_merged_request(q, req, el_ret); - goto out; + req->biotail->bi_next = bio; + req->biotail = bio; + req->nr_sectors = req->hard_nr_sectors += nr_sectors; + req->ioprio = ioprio_best(req->ioprio, prio); + drive_stat_acct(req, 0); + if (!attempt_back_merge(q, req)) + elv_merged_request(q, req, el_ret); + goto out; - case ELEVATOR_FRONT_MERGE: - BUG_ON(!rq_mergeable(req)); + case ELEVATOR_FRONT_MERGE: + BUG_ON(!rq_mergeable(req)); - if (!ll_front_merge_fn(q, req, bio)) - break; + if (!ll_front_merge_fn(q, req, bio)) + break; - blk_add_trace_bio(q, bio, BLK_TA_FRONTMERGE); + blk_add_trace_bio(q, bio, BLK_TA_FRONTMERGE); - bio->bi_next = req->bio; - req->bio = bio; + bio->bi_next = req->bio; + req->bio = bio; - /* - * may not be valid. if the low level driver said - * it didn't need a bounce buffer then it better - * not touch req->buffer either... - */ - req->buffer = bio_data(bio); - req->current_nr_sectors = bio_cur_sectors(bio); - req->hard_cur_sectors = req->current_nr_sectors; - req->sector = req->hard_sector = bio->bi_sector; - req->nr_sectors = req->hard_nr_sectors += nr_sectors; - req->ioprio = ioprio_best(req->ioprio, prio); - drive_stat_acct(req, 0); - if (!attempt_front_merge(q, req)) - elv_merged_request(q, req, el_ret); - goto out; - - /* ELV_NO_MERGE: elevator says don't/can't merge. */ - default: - ; + /* + * may not be valid. if the low level driver said + * it didn't need a bounce buffer then it better + * not touch req->buffer either... + */ + req->buffer = bio_data(bio); + req->current_nr_sectors = bio_cur_sectors(bio); + req->hard_cur_sectors = req->current_nr_sectors; + req->sector = req->hard_sector = bio->bi_sector; + req->nr_sectors = req->hard_nr_sectors += nr_sectors; + req->ioprio = ioprio_best(req->ioprio, prio); + drive_stat_acct(req, 0); + if (!attempt_front_merge(q, req)) + elv_merged_request(q, req, el_ret); + goto out; + + /* ELV_NO_MERGE: elevator says don't/can't merge. */ + default: + ; } get_rq: @@ -1350,7 +1344,7 @@ end_io: } if (unlikely(nr_sectors > q->max_hw_sectors)) { - printk("bio too big device %s (%u > %u)\n", + printk(KERN_ERR "bio too big device %s (%u > %u)\n", bdevname(bio->bi_bdev, b), bio_sectors(bio), q->max_hw_sectors); @@ -1439,7 +1433,6 @@ void generic_make_request(struct bio *bio) } while (bio); current->bio_tail = NULL; /* deactivate */ } - EXPORT_SYMBOL(generic_make_request); /** @@ -1480,13 +1473,12 @@ void submit_bio(int rw, struct bio *bio) current->comm, task_pid_nr(current), (rw & WRITE) ? "WRITE" : "READ", (unsigned long long)bio->bi_sector, - bdevname(bio->bi_bdev,b)); + bdevname(bio->bi_bdev, b)); } } generic_make_request(bio); } - EXPORT_SYMBOL(submit_bio); /** @@ -1518,9 +1510,8 @@ static int __end_that_request_first(struct request *req, int error, if (!blk_pc_request(req)) req->errors = 0; - if (error) { - if (blk_fs_request(req) && !(req->cmd_flags & REQ_QUIET)) - printk("end_request: I/O error, dev %s, sector %llu\n", + if (error && (blk_fs_request(req) && !(req->cmd_flags & REQ_QUIET))) { + printk(KERN_ERR "end_request: I/O error, dev %s, sector %llu\n", req->rq_disk ? req->rq_disk->disk_name : "?", (unsigned long long)req->sector); } @@ -1554,9 +1545,9 @@ static int __end_that_request_first(struct request *req, int error, if (unlikely(bio->bi_idx >= bio->bi_vcnt)) { blk_dump_rq_flags(req, "__end_that"); - printk("%s: bio idx %d >= vcnt %d\n", - __FUNCTION__, - bio->bi_idx, bio->bi_vcnt); + printk(KERN_ERR "%s: bio idx %d >= vcnt %d\n", + __FUNCTION__, bio->bi_idx, + bio->bi_vcnt); break; } @@ -1582,7 +1573,8 @@ static int __end_that_request_first(struct request *req, int error, total_bytes += nbytes; nr_bytes -= nbytes; - if ((bio = req->bio)) { + bio = req->bio; + if (bio) { /* * end more in this run, or just return 'not-done' */ @@ -1626,15 +1618,16 @@ static void blk_done_softirq(struct softirq_action *h) local_irq_enable(); while (!list_empty(&local_list)) { - struct request *rq = list_entry(local_list.next, struct request, donelist); + struct request *rq; + rq = list_entry(local_list.next, struct request, donelist); list_del_init(&rq->donelist); rq->q->softirq_done_fn(rq); } } -static int __cpuinit blk_cpu_notify(struct notifier_block *self, unsigned long action, - void *hcpu) +static int __cpuinit blk_cpu_notify(struct notifier_block *self, + unsigned long action, void *hcpu) { /* * If a CPU goes away, splice its entries to the current CPU @@ -1676,7 +1669,7 @@ void blk_complete_request(struct request *req) unsigned long flags; BUG_ON(!req->q->softirq_done_fn); - + local_irq_save(flags); cpu_list = &__get_cpu_var(blk_cpu_done); @@ -1685,9 +1678,8 @@ void blk_complete_request(struct request *req) local_irq_restore(flags); } - EXPORT_SYMBOL(blk_complete_request); - + /* * queue lock must be held */ @@ -2002,7 +1994,6 @@ int kblockd_schedule_work(struct work_struct *work) { return queue_work(kblockd_workqueue, work); } - EXPORT_SYMBOL(kblockd_schedule_work); void kblockd_flush_work(struct work_struct *work)