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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2007-07-18 23:45:48 -0300
committerLen Brown <len.brown@intel.com>2007-07-21 23:50:51 -0400
commitf432255e936a892a6896e5032e2b4897423076f2 (patch)
treece32df538477acab984d079d6963e0261c0d7325 /kernel
parentc78d5c96bb65b71a54b7551b404fbaf4763ed6e4 (diff)
ACPI: thinkpad-acpi: add locking to brightness subdriver
The backlight class does all the locking needed for sysfs access, but offers no API to interface to that locking without an layer violation. Since we need to mutex-lock procfs access, implement in-driver locking for brightness. It will go away the day thinkpad-acpi procfs goes away, or the backlight class gives us a way to use its locks without a layer violation. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
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