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Tejun Heo 4913efe456 block: deprecate barrier and replace blk_queue_ordered() with blk_queue_flush() 
Barrier is deemed too heavy and will soon be replaced by FLUSH/FUA
requests.  Deprecate barrier.  All REQ_HARDBARRIERs are failed with
-EOPNOTSUPP and blk_queue_ordered() is replaced with simpler
blk_queue_flush().

blk_queue_flush() takes combinations of REQ_FLUSH and FUA.  If a
device has write cache and can flush it, it should set REQ_FLUSH.  If
the device can handle FUA writes, it should also set REQ_FUA.

All blk_queue_ordered() users are converted.

* ORDERED_DRAIN is mapped to 0 which is the default value.
* ORDERED_DRAIN_FLUSH is mapped to REQ_FLUSH.
* ORDERED_DRAIN_FLUSH_FUA is mapped to REQ_FLUSH | REQ_FUA.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Boaz Harrosh <bharrosh@panasas.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Alasdair G Kergon <agk@redhat.com>
Cc: Pierre Ossman <drzeus@drzeus.cx>
Cc: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-09-10 12:35:36 +02:00
..
accessibility
acpi Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2010-08-15 17:37:07 -07:00
amba
ata ata: update for of_device to platform_device replacement 2010-08-16 15:13:28 -06:00
atm Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-12 09:11:31 -07:00
auxdisplay
base drivers/base/node.c: reduce stack usage of node_read_meminfo() 2010-08-09 20:45:02 -07:00
block block: deprecate barrier and replace blk_queue_ordered() with blk_queue_flush() 2010-09-10 12:35:36 +02:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2010-08-06 12:25:06 -07:00
cdrom block: push down BKL into .open and .release 2010-08-07 18:25:34 +02:00
char Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel 2010-08-22 11:03:27 -07:00
clocksource
connector
cpufreq [CPUFREQ] fix brace coding style issue. 2010-08-03 13:47:05 -04:00
cpuidle cpuidle: extend cpuidle and menu governor to handle dynamic states 2010-08-09 20:45:04 -07:00
crypto [S390] zcrypt: fix Kconfig dependencies 2010-08-13 10:06:54 +02:00
dca
dio
dma Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-12 09:11:31 -07:00
edac Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-12 09:11:31 -07:00
eisa
firewire
firmware Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2010-08-14 12:34:34 -07:00
gpio gpiolib: Implement set_debounce for WM831x GPIOs 2010-08-12 11:27:57 +02:00
gpu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel 2010-08-22 11:03:27 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2010-08-18 15:29:38 -07:00
hwmon revert "hwmon: f71882fg: add support for the Fintek F71808E" 2010-08-20 09:34:55 -07:00
i2c Merge branch 'for-linus/i2c-2636' of git://git.fluff.org/bjdooks/linux 2010-08-14 11:57:54 -07:00
ide block: deprecate barrier and replace blk_queue_ordered() with blk_queue_flush() 2010-09-10 12:35:36 +02:00
idle Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 2010-08-15 11:17:52 -07:00
ieee1394
ieee802154
infiniband Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-12 09:11:31 -07:00
input Input: fix faulty XXinput_* calls 2010-08-13 12:03:24 -07:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-08-13 10:38:12 -07:00
leds Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-12 09:11:31 -07:00
lguest
macintosh Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 2010-08-12 10:06:29 -07:00
mca
md block: deprecate barrier and replace blk_queue_ordered() with blk_queue_flush() 2010-09-10 12:35:36 +02:00
media v4l: Remove reference to bkl ioctl in compat ioctl handling 2010-08-14 00:24:24 +02:00
memstick memstick: fix hangs on unexpected device removal in mspro_blk 2010-08-12 08:43:31 -07:00
message fusion: add function parameter names to kernel-doc 2010-08-14 16:21:00 -07:00
mfd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6 2010-08-12 10:01:30 -07:00
misc Merge branch 'params' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus 2010-08-12 10:01:59 -07:00
mmc block: deprecate barrier and replace blk_queue_ordered() with blk_queue_flush() 2010-09-10 12:35:36 +02:00
mtd Merge git://git.infradead.org/mtd-2.6 2010-08-21 12:47:05 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-08-17 18:34:37 -07:00
nubus
of of/device: Replace struct of_device with struct platform_device 2010-08-06 09:25:50 -06:00
oprofile
parisc Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-08-04 15:31:02 -07:00
parport Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-12 09:11:31 -07:00
pci Merge git://git.infradead.org/iommu-2.6 2010-08-15 17:34:20 -07:00
pcmcia Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-12 09:11:31 -07:00
platform platform/x86: move rfkill for Dell Mini 1012 to compal-laptop 2010-08-16 11:55:00 -04:00
pnp
power Merge git://git.infradead.org/battery-2.6 2010-08-12 09:58:33 -07:00
pps
ps3
rapidio
regulator regulator: Remove default DEBUG define from TPS6586x 2010-08-11 11:38:03 +01:00
rtc Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-12 09:11:31 -07:00
s390 block: deprecate barrier and replace blk_queue_ordered() with blk_queue_flush() 2010-09-10 12:35:36 +02:00
sbus of/device: Replace struct of_device with struct platform_device 2010-08-06 09:25:50 -06:00
scsi block: deprecate barrier and replace blk_queue_ordered() with blk_queue_flush() 2010-09-10 12:35:36 +02:00
serial Merge branch 'merge-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-18 09:26:17 -07:00
sfi
sh sh: add a reparent function to DIV6 clocks 2010-08-04 16:12:01 +09:00
sn
spi m68knommu: include sched.h in ColdFire/SPI driver 2010-08-18 12:44:31 +10:00
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2010-08-06 12:25:06 -07:00
staging fs: fs_struct rwlock to spinlock 2010-08-18 08:35:46 -04:00
tc
telephony pcmcia: do not use io_req_t when calling pcmcia_request_io() 2010-08-03 09:04:11 +02:00
thermal
uio uio: Remove IRQF_DISABLED flag from uio_cif.c 2010-08-05 13:53:33 -07:00
usb Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 2010-08-12 10:06:29 -07:00
uwb
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2010-08-04 11:47:58 -07:00
video matroxfb: fix incorrect use of memcpy_toio() 2010-08-20 09:34:54 -07:00
virtio
vlynq
w1
watchdog watchdog: hpwdt (12/12): Make NMI decoding a compile-time option 2010-08-13 20:54:53 +00:00
xen Merge branch 'stable/xen-swiotlb-0.8.6' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2010-08-12 09:09:41 -07:00
zorro zorro: Fix reading of proc/bus/zorro/* in small chunks 2010-08-09 21:14:08 +02:00
Kconfig
Makefile