>>> Andi Kleen <[EMAIL PROTECTED]> 19.09.07 18:09 >>> >On Wednesday 19 September 2007 16:39:39 Jan Beulich wrote: >> One more of these issues (which were considered fixed a few releases >> back): Other than on x86-64, i386 allows set_fixmap() to replace >> already present mappings. Consequently, on PAE, care must be taken to >> not update the high half of a pte while the low half is still holding >> the old value. > >Hmm perhaps it would be better to just forbid it on i386 too. >Do you know who uses it?
PCI's mmconfig accessor. One could of course make it call clear_fixmap() prior to establishing a new mapping, but I thought that was not intended and is the reason for allowing this. Jan - 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/
