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commit ca9ab10033d190c1ede85fdf456307bdfdabf079 upstream. The driver requires shmfs as the backing filesystem to handle the buffer objects, so ensure it is selected if the user chooses to build our driver. Fixes: Bug 14662 - Dell E5500 kernel panic with KMS http://bugzilla.kernel.org/show_bug.cgi?id=14662 The revealing nature of the panic is the NULL function pointer dereference in read_cache_page_async(). Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reported-and-tested-by: Mateusz Kaduk <mateusz.kaduk@gmail.com> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>