[PATCH] powermac: Combined fixes for backlight code

This patch fixes several problems:
- pmac_backlight_key() is called under interrupt context, and therefore
  can't use mutexes or semaphores, so defer the backlight level for
  later, as it's not critical (original code by Aristeu S. Rozanski F.
  <aris@valeta.org>).
- Add exports for functions that might be called from modules
- Fix Kconfig depdencies on PMAC_BACKLIGHT.
- Fix locking issues on calls from inside the driver (reported by
  Aristeu S. Rozanski F., too)
- Fix wrong calculation of backlight values in some of the drivers
- Replace pmac_backlight_key_up/down by inline functions

[akpm@osdl.org: fix function prototypes]
Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch>
Acked-by: Aristeu S. Rozanski F. <aris@valeta.org>
Acked-by: Rene Nussbaumer <linux-kernel@killerfox.forkbomb.ch>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/video/nvidia/nv_proto.h b/drivers/video/nvidia/nv_proto.h
index 6fba656cd56b..861271017655 100644
--- a/drivers/video/nvidia/nv_proto.h
+++ b/drivers/video/nvidia/nv_proto.h
@@ -68,9 +68,11 @@ extern u8 byte_rev[256];
 #ifdef CONFIG_FB_NVIDIA_BACKLIGHT
 extern void nvidia_bl_init(struct nvidia_par *par);
 extern void nvidia_bl_exit(struct nvidia_par *par);
+extern void nvidia_bl_set_power(struct fb_info *info, int power);
 #else
 static inline void nvidia_bl_init(struct nvidia_par *par) {}
 static inline void nvidia_bl_exit(struct nvidia_par *par) {}
+static inline void nvidia_bl_set_power(struct fb_info *info, int power) {}
 #endif
 
 #endif				/* __NV_PROTO_H__ */