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Richard Purdie 28ee086d5b backlight: Fix external uses of backlight internal semaphore 
backlight_device->sem has a very specific use as documented in the
header file. The external users of this are using it for a different
reason, to serialise access to the update_status() method.

backlight users were supposed to implement their own internal
serialisation of update_status() if needed but everyone is doing
things differently and incorrectly. Therefore add a global mutex to
take care of serialisation for everyone, once and for all.

Locking for get_brightness remains optional since most users don't
need it.

Also update the lcd class in a similar way.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
2007-02-20 08:38:45 +00:00
..
acorn [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
acpi backlight: Remove unneeded owner field 2007-02-20 08:37:40 +00:00
amba
ata [PATCH] libata: wrong sizeof for BUFFER 2007-02-16 13:32:41 -05:00
atm atm: Use ARRAY_SIZE macro when appropriate 2007-02-17 15:30:48 -05:00
auxdisplay [PATCH] drivers: add LCD support 2007-02-11 10:51:24 -08:00
base Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
block [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
bluetooth [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
cdrom [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
char Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog 2007-02-19 14:16:51 -08:00
clocksource [PATCH] Allow early access to the power management timer 2007-02-16 08:13:58 -08:00
connector [PATCH] connector: some fixes for ia64 unaligned access errors 2007-01-05 23:55:29 -08:00
cpufreq Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq 2007-02-16 08:16:01 -08:00
crypto [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
dio
dma [PATCH] slab: remove SLAB_KERNEL 2006-12-07 08:39:24 -08:00
edac [PATCH] EDAC: Add Fully-Buffered DIMM APIs to core 2007-02-12 09:48:32 -08:00
eisa
fc4 [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
firmware [PATCH] docbook: add edd firmware interfaces 2007-02-11 10:51:32 -08:00
hid [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
hwmon hwmon/vt1211: Add probing of alternate config index port 2007-02-14 21:15:05 +01:00
i2c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
ieee1394 Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
input Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/dtor/input 2007-02-19 13:31:34 -08:00
isdn Various typo fixes. 2007-02-17 19:07:33 +01:00
kvm [PATCH] i386: Convert i386 PDA code to use %fs 2007-02-13 13:26:20 +01:00
leds [PATCH] Fix leds-s3c24xx hardware.h reference 2007-01-05 23:55:21 -08:00
macintosh backlight: Fix external uses of backlight internal semaphore 2007-02-20 08:38:45 +00:00
mca
md [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
media Storage class should be before const qualifier 2007-02-17 20:11:19 +01:00
message [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
mfd [PATCH] Add include/linux/freezer.h and move definitions from sched.h 2006-12-07 08:39:27 -08:00
misc backlight: Fix external uses of backlight internal semaphore 2007-02-20 08:38:45 +00:00
mmc Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2007-02-19 13:18:39 -08:00
mtd Merge git://git.infradead.org/mtd-2.6 2007-02-19 13:34:11 -08:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
nubus
oprofile [PATCH] mark struct file_operations const 5 2007-02-12 09:48:45 -08:00
parisc [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
parport [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
pci Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
pcmcia Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
pnp Pull misc-for-upstream into release branch 2007-02-16 18:52:41 -05:00
ps3 [POWERPC] PS3: System manager support 2007-02-16 14:00:19 +11:00
rapidio [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
rtc [PATCH] Scheduled removal of SA_xxx interrupt flags fixups 2007-02-14 08:09:54 -08:00
s390 [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
sbus Various typo fixes. 2007-02-17 19:07:33 +01:00
scsi Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2007-02-19 13:32:28 -08:00
serial Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2007-02-19 13:18:39 -08:00
sh
sn [PATCH] IOC3/IOC4: PCI mem space resources 2007-02-11 10:51:25 -08:00
spi [PATCH] SPI: atmel_spi driver 2007-02-14 08:09:53 -08:00
tc [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
telephony [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
usb backlight: Fix external uses of backlight internal semaphore 2007-02-20 08:38:45 +00:00
video backlight: Fix external uses of backlight internal semaphore 2007-02-20 08:38:45 +00:00
w1 [PATCH] w1: Use ARRAY_SIZE macro when appropriate 2007-02-12 09:48:28 -08:00
zorro [PATCH] mark struct file_operations const 6 2007-02-12 09:48:45 -08:00
Kconfig [PATCH] drivers: add LCD support 2007-02-11 10:51:24 -08:00
Makefile [PATCH] drivers: add LCD support 2007-02-11 10:51:24 -08:00