Hello,
May we have
e89f5b370153 ("dma-mapping: Don't clear GFP_ZERO in dma_alloc_attrs")
back-ported to 4.16 kernel as it fixes:
57bf5a8 ("dma-mapping: clear harmful GFP_* flags in common code").
For more info about introduced problem see this thread:
http://lists.infradead.org/pipermail/linux-snps-arc/2018-March/003652.html
-Alexey
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