Re: [PATCH 6/7] ARM: use the common dma_to_phys/phys_to_dma implementation where possible
From: Christoph Hellwig <hch@lst.de>
Date: 2022-04-21 14:12:50
Also in:
linux-iommu, linux-usb, lkml
On Thu, Apr 21, 2022 at 10:05:11AM +0200, Arnd Bergmann wrote:
quoted
-unsigned long __pfn_to_bus(unsigned long pfn) +#else +static inline unsigned long fb_bus_sdram_offset(void) { - return __pfn_to_phys(pfn) + (fb_bus_sdram_offset() - PHYS_OFFSET); + return BUS_OFFSET; } -EXPORT_SYMBOL(__pfn_to_bus); +#endif /* CONFIG_FOOTBRIDGE_ADDIN */I have an older patch to remove CONFIG_FOOTBRIDGE_ADDIN completely, as it does a couple of other nasty things and there are apparently no users. Would that help here?
For this series it doesn't really make much of a difference. The addin case actually is simpler than the host mode for DMA, But overall CONFIG_FOOTBRIDGE_ADDIN seems to be a collection of special cases, so if it is unused and can be remove that would probably be a good thing. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel