Messages in this thread Patch in this message | | | From | Badari Pulavarty <> | Subject | [PATCH] page_to_phys() fix for >4GB pages (i386) | Date | Fri, 15 Mar 2002 14:57:09 -0800 (PST) |
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Hi,
I found that page_to_phys() is broken for pages > 4GB on x86. It is truncating the physical addresses to 32bit, loosing higher bits. (pci_map_sg() uses this).
Here is the patch to fix it. Marcelo, could you consider this patch ? I have not looked at 2.5 yet, it may be needed there also.
Thanks, Badari
--- linux/include/asm-i386/io.h Fri Mar 15 11:19:28 2002 +++ linux.new/include/asm-i386/io.h Fri Mar 15 11:20:38 2002 @@ -76,7 +76,11 @@ /* * Change "struct page" to physical address. */ +#ifdef CONFIG_HIGHMEM64G +#define page_to_phys(page) ((u64)(page - mem_map) << PAGE_SHIFT) +#else #define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT) +#endif
extern void * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
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