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drm/lima: Fix lima cache creation

Andreas Baierl requested to merge rellla/linux:gitlab/lima-4.19-rc4 into lima-4.19-rc4

Due to the kernel merge of the hardened usercopy patch set we have to whitelist the memory area which is used for copy_from_user actions. Otherwise lima fails with an abort and segmentation fault.

This is necessary on systems with CONFIG_HARDENED_USERCOPY enabled. It was tested on a Cubieboard 1, Allwinner A10.

Signed-off-by: Andreas Baierl ichgeh@imkreisrum.de

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