There is another reason we can't just do a dumb changeover - two actually

#1: Some drivers are using inb_p/outb_p in PCI cases which are going to
cause PCI posting changes. Most are probably just wrong in the first
place but they need hand checking

#2: We've got SMP cases that only 'work' because the odds of splitting
the outb and the following port 0x80 cycle, which locks the bus, are tiny.

That is we've got

                CPU1                    CPU2
                main path               irq path
                outb
                                        outb

                inb 0x80
                                        inb 0x80

races in one or two spots.
--
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/

Reply via email to