> +#include <linux/squashfs_fs.h>
As Ralf mentioned this is not in mainline, so you can't include it.
Fortunately for you including it seems to be a rather dumb idea anyway,
see below for further comments.
> +static struct mtd_partition ar7_parts[5];
Can we please get a symbolic name for that 5? Then again we only
seems to use 3 anyway, and create_mtd_partitions returns 4..
> + unsigned int root_offset = 0xe0000;
Please provide a symbolic name for this one.
> + printk(KERN_INFO "Parsing AR7 partition map...\n");
Do we really need this printk?
> + if (header.checksum == 0xfeedfa42)
> + break;
> + if (header.checksum == 0xfeed1281)
> + break;
These two want symbolic names, please:
enum {
/* some comment */
FOO_PART_MAGIC = 0xfeedfa42,
/* more comment */
BAR_PART_MAGIC = 0xfeed1281,
};
> + switch (header.checksum) {
> + case 0xfeedfa42:
> + while (header.length) {
> + offset += sizeof(header) + header.length;
> + master->read(master, offset, sizeof(header),
> + &len, (u_char *)&header);
> + }
> + root_offset = offset + sizeof(header) + 4;
> + break;
> + case 0xfeed1281:
Especially as you use them here again.
> + default:
> + printk(KERN_WARNING "Unknown magic: %08x\n", header.checksum);
> + break;
> + }
> +
> + master->read(master, root_offset,
> + sizeof(header), &len, (u_char *)&header);
> + if (header.checksum != SQUASHFS_MAGIC) {
> + root_offset += master->erasesize - 1;
> + root_offset &= ~(master->erasesize - 1);
> + }
And after this I'm pretty sure either of the two hex constants above
is SQUASHFS_MAGIC. But not actually the magic in the squashfs
superblock, but someone decided to reuse it for the partitions magic.
So one of the comments for *_PART_MAGIC becomes:
/* same as SQUASHFS_MAGIC for some odd reason.. */
