linux/arch
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
..
alpha [PATCH] Dynamic kernel command-line: alpha 2007-02-12 09:48:37 -08:00
arm Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
arm26 [PATCH] Dynamic kernel command-line: arm26 2007-02-12 09:48:37 -08:00
avr32 Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2007-02-19 13:18:39 -08:00
cris arch/cris: typo in KERN_INFO 2007-02-17 20:12:12 +01:00
frv [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
h8300 [PATCH] Declare init_irq_proc before we use it. 2007-02-19 14:21:50 -08:00
i386 [PATCH] tick management: make broadcast dependent on local APIC 2007-02-19 14:22:43 -08:00
ia64 Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
m32r Various typo fixes. 2007-02-17 19:07:33 +01:00
m68k [PATCH] Declare init_irq_proc before we use it. 2007-02-19 14:21:50 -08:00
m68knommu [PATCH] Declare init_irq_proc before we use it. 2007-02-19 14:21:50 -08:00
mips [MIPS] Cobalt: Fix UART I/O type 2007-02-20 01:26:42 +00:00
parisc Replace remaining references to "driverfs" with "sysfs". 2007-02-17 19:13:42 +01:00
powerpc backlight: Fix external uses of backlight internal semaphore 2007-02-20 08:38:45 +00:00
ppc [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
s390 [PATCH] clocksource: fixup is_continous changes on S390 2007-02-16 08:13:57 -08:00
sh Storage class should be before const qualifier 2007-02-17 20:11:19 +01:00
sh64 [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
sparc [SPARC]: Re-export saved_command_line to modules. 2007-02-12 15:15:48 -08:00
sparc64 [SPARC]: Re-export saved_command_line to modules. 2007-02-12 15:15:48 -08:00
um [PATCH] uml: fix 2.6.20 hang 2007-02-16 08:13:56 -08:00
v850 kbuild: Replace remaining "depends" with "depends on" 2007-02-17 19:05:24 +01:00
x86_64 Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
xtensa [PATCH] Dynamic kernel command-line: xtensa 2007-02-12 09:48:39 -08:00