[069/119] drm/i915: Select CONFIG_SHMEM

[Greg KH]

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxxxxxx>
Reported-and-tested-by: Mateusz Kaduk <mateusz.kaduk@xxxxxxxxx>
Signed-off-by: Eric Anholt <eric@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/gpu/drm/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -82,6 +82,7 @@ config DRM_I830
 config DRM_I915
 	tristate "i915 driver"
 	depends on AGP_INTEL
+	select SHMEM
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT


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