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PD#SWPL-881 Problem: Amlogic modified code when compatcion from normal case. And side effect is that pages in normal zone maybe migrated to highmem zone. Which caused page_address get a NULL value and kernel panic occurred. Solution: Avoid pages migarte to different zone by adding forbid_to_cma flags. Verify: P212 Change-Id: I1d9c6653dc1069562db3c1be3f53a3510a51f0d1 Signed-off-by: tao zeng <tao.zeng@amlogic.com>