tjh.dev
+12
-2
kernel/memremap.c
+12
-2
kernel/memremap.c
···
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}
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#endif
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static void *try_ram_remap(resource_size_t offset, size_t size)
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{
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struct page *page = pfn_to_page(offset >> PAGE_SHIFT);
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/* In the simple case just return the existing linear address */
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if (!PageHighMem(page))
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return __va(offset);
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return NULL; /* fallback to ioremap_cache */
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}
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/**
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* memremap() - remap an iomem_resource as cacheable memory
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* @offset: iomem resource start address
···
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* the requested range is potentially in "System RAM"
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*/
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if (is_ram == REGION_INTERSECTS)
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addr = __va(offset);
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else
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addr = try_ram_remap(offset, size);
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if (!addr)
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addr = ioremap_cache(offset, size);
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}
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