Krzysztof Helt 537a1bf059 fbdev: add mutex for fb_mmap locking ... Add a mutex to avoid a circular locking problem between the mm layer semaphore and fbdev ioctl mutex through the fb_mmap() call. Also, add mutex to all places where smem_start and smem_len fields change so the mutex inside the fb_mmap() is actually used. Changing of these fields before calling the framebuffer_register() are not mutexed. This is 2.6.31 material. It removes one lockdep (fb_mmap() and register_framebuffer()) but there is still another one (fb_release() and register_framebuffer()). It also cleans up handling of the smem_start and smem_len fields used by mutexed section of the fb_mmap(). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-06-30 18:56:00 -07:00
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300vtbl.h
310vtbl.h
init301.c
init301.h
init.c
init.h
initdef.h
initextlfb.c
Makefile
oem300.h
oem310.h
osdef.h
sis_accel.c
sis_accel.h
sis_main.c	fbdev: add mutex for fb_mmap locking	2009-06-30 18:56:00 -07:00
sis_main.h
sis.h
vgatypes.h
vstruct.h