get_xip_page() uncertainity
I am trying to create valid "struct page* (*get_xip_page)(struct address_space *, sector_t, int)" to use the filemap_xip.c. I've been trying to do it as follows: virtual = ioremap(physical,size); struct page* my_get_xip_page(struct address_space *mapping, sector_t sector, int create) { unsigned long offset; /*extract offset from mapping and sector*/ return virt_to_page(virtual + offset); } I believe this to be fundamentally flawed. While this works for xip_file_read(), it does not work for xip_file_mmap(). I'm not sure I understand the correct way to do this. But I assume the problem, and have some evidence to support it, is that virt_to_page() is not returning a vaild page struct. How can I get a valid page struct? The memory is not RAM but Flash. It is addressable like RAM and I want userspace to use it like readonly RAM. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
get_xip_page() uncertainity
I am trying to create valid struct page* (*get_xip_page)(struct address_space *, sector_t, int) to use the filemap_xip.c. I've been trying to do it as follows: virtual = ioremap(physical,size); struct page* my_get_xip_page(struct address_space *mapping, sector_t sector, int create) { unsigned long offset; /*extract offset from mapping and sector*/ return virt_to_page(virtual + offset); } I believe this to be fundamentally flawed. While this works for xip_file_read(), it does not work for xip_file_mmap(). I'm not sure I understand the correct way to do this. But I assume the problem, and have some evidence to support it, is that virt_to_page() is not returning a vaild page struct. How can I get a valid page struct? The memory is not RAM but Flash. It is addressable like RAM and I want userspace to use it like readonly RAM. - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/