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Jaya Kumar f31ad92f34 fbdev: bugfix for multiprocess defio 
This patch is a bugfix for how defio handles multiple processes manipulating
the same framebuffer.

Thanks to Bernard Blackham for identifying this bug.

It occurs when two applications mmap the same framebuffer and concurrently
write to the same page.  Normally, this doesn't occur since only a single
process mmaps the framebuffer.  The symptom of the bug is that the mapping
applications will hang.  The cause is that defio incorrectly tries to add the
same page twice to the pagelist.  The solution I have is to walk the pagelist
and check for a duplicate before adding.  Since I needed to walk the pagelist,
I now also keep the pagelist in sorted order.

Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com>
Cc: Bernard Blackham <bernard@largestprime.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2008-07-12 14:33:41 -07:00
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accessibility
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acorn/char
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acpi x86 ACPI: normalize segment descriptor register on resume 2008-07-05 08:25:40 +02:00
amba
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ata libata-acpi: don't call sleeping function from invalid context 2008-07-11 09:42:03 -04:00
atm atm: [he] send idle cells instead of unassigned when in SDH mode 2008-06-16 17:21:27 -07:00
auxdisplay Miguel Ojeda has moved 2008-07-04 10:40:05 -07:00
base mm: switch node meminfo Active & Inactive pages to Kbytes 2008-07-04 10:40:09 -07:00
block cciss: read config to obtain max outstanding commands per controller 2008-07-04 10:40:09 -07:00
bluetooth
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cdrom
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char drivers/char/pcmcia/ipwireless/hardware.c fix resource leak 2008-07-12 14:33:41 -07:00
clocksource
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connector CONNECTOR: add a proc entry to list connectors 2008-06-27 20:03:24 -07:00
cpufreq
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cpuidle cpuidle acpi driver: fix oops on AC<->DC 2008-06-11 19:13:45 -04:00
crypto
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dca
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dio
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dma
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edac
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eisa
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firewire firewire: fw-sbp2: fix parsing of logical unit directories 2008-06-27 20:55:00 +02:00
firmware
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gpio gpio: pca953x (i2c) handles max7310 too 2008-07-04 10:40:06 -07:00
hid
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hwmon hdaps: add support for various newer Lenovo thinkpads 2008-07-04 10:40:06 -07:00
i2c I2C: S3C2410: Add MODULE_ALIAS() for s3c2440 device. 2008-07-01 14:30:38 +01:00
ide it8213: fix return value in it8213_init_one() 2008-07-08 19:27:23 +02:00
ieee1394 ieee1394: Kconfig menu touch-up 2008-06-19 00:12:36 +02:00
infiniband RDMA/cxgb3: Fix regression caused by class_device -> device conversion 2008-07-08 14:40:05 -07:00
input drivers/input/ff-core.c needs <linux/sched.h> 2008-07-02 18:40:08 -07:00
isdn drivers/isdn/i4l/isdn_common.c fix small resource leak 2008-07-12 14:33:41 -07:00
leds
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lguest x86: fix NULL pointer deref in __switch_to 2008-06-20 13:26:18 +02:00
macintosh [POWERPC] Build fix for drivers/macintosh/mediabay.c 2008-06-16 15:00:47 +10:00
mca
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md Merge branch 'for-2.6.26' of git://neil.brown.name/md 2008-07-10 09:49:46 -07:00
media V4L/DVB (8178): uvc: Fix compilation breakage for the other drivers, if uvc is selected 2008-07-02 08:58:15 -03:00
memstick
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message
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mfd
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misc thinkpad-acpi: fix LED handling on older ThinkPads 2008-06-11 19:13:45 -04:00
mmc pxamci: fix byte aligned DMA transfers 2008-07-06 10:37:40 -07:00
mtd
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net tun: Persistent devices can get stuck in xoff state 2008-07-10 16:59:11 -07:00
nubus
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of
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oprofile
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parisc
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parport
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pci pci: VT3336 can't do MSI either 2008-07-04 10:40:05 -07:00
pcmcia
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pnp PNPACPI: use _CRS IRQ descriptor length for _SRS 2008-06-11 19:13:46 -04:00
power power_supply: Fix race in power_supply_uevent 2008-06-10 02:13:51 +04:00
ps3
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rapidio rapidio: fix device reference counting 2008-07-10 18:04:43 -07:00
rtc rtc-x1205: Fix alarm set 2008-07-04 10:40:05 -07:00
s390 Merge branch 'kvm-updates-2.6.26' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm 2008-06-11 10:35:44 -07:00
sbus
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scsi [SCSI] esp: tidy up target reference counting 2008-06-25 12:36:13 -05:00
serial serial: fix serial_match_port() for dynamic major tty-device numbers 2008-07-04 10:40:04 -07:00
sh
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sn
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spi spi: fix the read path in spidev 2008-07-04 10:40:08 -07:00
ssb ssb-pcicore: Fix IRQ-vector init on embedded devices 2008-07-07 15:31:40 -04:00
tc
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telephony
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thermal thermal: Create CONFIG_THERMAL_HWMON=n 2008-06-25 19:25:42 -04:00
uio
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usb Fix name of Russell King in various comments 2008-07-10 18:04:43 -07:00
video fbdev: bugfix for multiprocess defio 2008-07-12 14:33:41 -07:00
virtio virtio: Complete feature negotation before updating status 2008-06-15 13:46:16 -07:00
w1
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watchdog Revert "[WATCHDOG] hpwdt: Add CFLAGS to get driver working" 2008-06-24 13:09:26 +00:00
xen xen: Use wmb instead of rmb in xen_evtchn_do_upcall(). 2008-06-20 14:56:30 +02:00
zorro
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Kconfig
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Makefile
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