Messages in this thread | | | Date | Wed, 3 Nov 2010 15:32:06 +0000 | From | Ralf Baechle <> | Subject | Unaligned accesses in AVR32 kernel |
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Hans-Christian,
I received a bug report for some networking code from which it seems as if the AVR32 kernel doesn't fixup exceptions caused by missaligned kernel accesses either in software or hardware. This is a problem as there in the networking stack there is no general guarantee that all multi-byte header fields such as ARP or IP headers will aligned. Networking drivers are supposed to make a decent attempt to place packets at a suitable address but there is no guarantee. The mkiss.c driver gets that wrong which I'm fixing but fundamentally you want to add automated fixing of unaligned exception to the AVR32 kernel. See arch/mips/kernel/unaligned.c.
Cheers,
Ralf
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