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Kiyoshi Ueda 336cdb4003 blk_end_request: add new request completion interface (take 4) ... This patch adds 2 new interfaces for request completion: o blk_end_request() : called without queue lock o __blk_end_request() : called with queue lock held blk_end_request takes 'error' as an argument instead of 'uptodate', which current end_that_request_* take. The meanings of values are below and the value is used when bio is completed. 0 : success < 0 : error Some device drivers call some generic functions below between end_that_request_{first/chunk} and end_that_request_last(). o add_disk_randomness() o blk_queue_end_tag() o blkdev_dequeue_request() These are called in the blk_end_request interfaces as a part of generic request completion. So all device drivers become to call above functions. To decide whether to call blkdev_dequeue_request(), blk_end_request uses list_empty(&rq->queuelist) (blk_queued_rq() macro is added for it). So drivers must re-initialize it using list_init() or so before calling blk_end_request if drivers use it for its specific purpose. (Currently, there is no driver which completes request without re-initializing the queuelist after used it. So rq->queuelist can be used for the purpose above.) "Normal" drivers can be converted to use blk_end_request() in a standard way shown below. a) end_that_request_{chunk/first} spin_lock_irqsave() (add_disk_randomness(), blk_queue_end_tag(), blkdev_dequeue_request()) end_that_request_last() spin_unlock_irqrestore() => blk_end_request() b) spin_lock_irqsave() end_that_request_{chunk/first} (add_disk_randomness(), blk_queue_end_tag(), blkdev_dequeue_request()) end_that_request_last() spin_unlock_irqrestore() => spin_lock_irqsave() __blk_end_request() spin_unlock_irqsave() c) spin_lock_irqsave() (add_disk_randomness(), blk_queue_end_tag(), blkdev_dequeue_request()) end_that_request_last() spin_unlock_irqrestore() => blk_end_request() or spin_lock_irqsave() __blk_end_request() spin_unlock_irqrestore() Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>		17 years ago
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acpi	kobject: convert /sys/firmware/acpi/ to use kobject_create	17 years ago
asm-alpha	…
asm-arm	i2c-pxa: Add polling transfer	17 years ago
asm-avr32	[AVR32] NMI debugging	17 years ago
asm-blackfin	[Blackfin] arch: Add the semtimedop syscall. Upstream uClibc doesn't compile without it.	17 years ago
asm-cris	ide: remove stale ide.h "configuration options"	17 years ago
asm-frv	ide: remove stale ide.h "configuration options"	17 years ago
asm-generic	sched: SCHED_FIFO/SCHED_RR watchdog timer	17 years ago
asm-h8300	…
asm-ia64	…
asm-m32r	…
asm-m68k	…
asm-m68knommu	…
asm-mips	[MIPS] SMTC: Fix build error.	17 years ago
asm-parisc	…
asm-powerpc	ide: remove stale ide.h "configuration options"	17 years ago
asm-ppc	…
asm-s390	[S390] do local_irq_restore while spinning in spin_lock_irqsave.	17 years ago
asm-sh	sh: Force __access_ok() to obey address space limit.	17 years ago
asm-sh64	…
asm-sparc	…
asm-sparc64	…
asm-um	…
asm-v850	…
asm-x86	sched: high-res preemption tick	17 years ago
asm-xtensa	…
crypto	[CRYPTO] api: Include sched.h for cond_resched in scatterwalk.h	17 years ago
keys	…
linux	blk_end_request: add new request completion interface (take 4)	17 years ago
math-emu	…
media	i2c: Constify client address data	17 years ago
mtd	…
net	IPoIB: improve IPv4/IPv6 to IB mcast mapping functions	17 years ago
pcmcia	…
rdma	RDMA/cma: add support for rdma_migrate_id()	17 years ago
rxrpc	…
scsi	[SCSI] libsas: abstract STP task status into a function	17 years ago
sound	…
video	…
xen	…
Kbuild	…