From: Richard Purdie Date: Thu, 8 Feb 2007 22:25:09 +0000 (+0000) Subject: backlight: Fix external uses of backlight internal semaphore X-Git-Tag: v2.6.21-rc1~52^2~12 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=28ee086d5b36aab2931f6740e409bb0fb6c65e5f;p=pandora-kernel.git 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 --- Reading git-diff-tree failed