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 x8hhiKM+ 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until > they are released from the pool, to avoid the overhead of re-mapping the > pages every time they are used. This causes resource leaks and/or > crashes when there are pages still outstanding while the device is torn > down, because page_pool will attempt an unmap through a non-existent DMA > device on the subsequent page return. [...] > @@ -173,10 +212,10 @@ struct page_pool { > int cpuid; > u32 pages_state_hold_cnt; > > - bool has_init_callback:1; /* slow::init_callback is set */ > + bool dma_sync; /* Perform DMA sync for device */ Have you seen my comment under v3 (sorry but I missed that there was v4 already)? Can't we just test the bit atomically? > bool dma_map:1; /* Perform DMA mapping */ > - bool dma_sync:1; /* Perform DMA sync for device */ > bool dma_sync_for_cpu:1; /* Perform DMA sync for cpu */ > + bool has_init_callback:1; /* slow::init_callback is set */ Thanks, Olek