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author	Bram Moolenaar <Bram@vim.org>	2004-06-13 20:20:40 +0000
committer	Bram Moolenaar <Bram@vim.org>	2004-06-13 20:20:40 +0000
commit	071d4279d6ab81b7187b48f3a0fc61e587b6db6c (patch)
tree	221cbe3c40e043163c06f61c52a7ba2eb41e12ce /Xxd.info
parent	b4210b3bc14e2918f153a7307530fbe6eba659e1 (diff)

updated for version 7.0001v7.0001

Diffstat (limited to 'Xxd.info')

-rwxr-xr-x

Xxd.info

bin

0 -> 835 bytes

1 files changed, 0 insertions, 0 deletions

/* * Functions related to setting various queue properties from drivers */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/bio.h> #include <linux/blkdev.h> #include <linux/blk-mq.h> #include <linux/sched/sysctl.h> #include "blk.h" #include "blk-mq-sched.h" /** * blk_end_sync_rq - executes a completion event on a request * @rq: request to complete * @error: end I/O status of the request */ static void blk_end_sync_rq(struct request *rq, blk_status_t error) { struct completion *waiting = rq->end_io_data; rq->end_io_data = NULL; /* * complete last, if this is a stack request the process (and thus * the rq pointer) could be invalid right after this complete() */ complete(waiting); } /** * blk_execute_rq_nowait - insert a request into queue for execution * @q: queue to insert the request in * @bd_disk: matching gendisk * @rq: request to insert * @at_head: insert request at head or tail of queue * @done: I/O completion handler * * Description: * Insert a fully prepared request at the back of the I/O scheduler queue * for execution. Don't wait for completion. * * Note: * This function will invoke @done directly if the queue is dead. */ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk, struct request *rq, int at_head, rq_end_io_fn *done) { int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK; WARN_ON(irqs_disabled()); WARN_ON(!blk_rq_is_passthrough(rq)); rq->rq_disk = bd_disk; rq->end_io = done; /* * don't check dying flag for MQ because the request won't * be reused after dying flag is set */ if (q->mq_ops) { blk_mq_sched_insert_request(rq, at_head, true, false); return; } spin_lock_irq(q->queue_lock); if (unlikely(blk_queue_dying(q))) { rq->rq_flags |= RQF_QUIET; __blk_end_request_all(rq, BLK_STS_IOERR); spin_unlock_irq(q->queue_lock); return; } __elv_add_request(q, rq, where); __blk_run_queue(q); spin_unlock_irq(q->queue_lock); } EXPORT_SYMBOL_GPL(blk_execute_rq_nowait); /** * blk_execute_rq - insert a request into queue for execution * @q: queue to insert the request in * @bd_disk: matching gendisk * @rq: request to insert * @at_head: insert request at head or tail of queue * * Description: * Insert a fully prepared request at the back of the I/O scheduler queue * for execution and wait for completion. */ void blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk, struct request *rq, int at_head) { DECLARE_COMPLETION_ONSTACK(wait); unsigned long hang_check; rq->end_io_data = &wait; blk_execute_rq_nowait(q, bd_disk, rq, at_head, blk_end_sync_rq); /* Prevent hang_check timer from firing at us during very long I/O */ hang_check = sysctl_hung_task_timeout_secs; if (hang_check) while (!wait_for_completion_io_timeout(&wait, hang_check * (HZ/2))); else wait_for_completion_io(&wait); } EXPORT_SYMBOL(blk_execute_rq);


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