Messages in this thread | | | Subject | Re: [PATCH] m68k: mm: Remove check for VM_IO to fix deferred I/O | From | Michael Schmitz <> | Date | Sat, 29 Jan 2022 15:08:46 +1300 |
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Hi Finn,
Am 29.01.2022 um 12:55 schrieb Finn Thain: > On Sat, 29 Jan 2022, Michael Schmitz wrote: > >> Hi Geert, >> >> for hwregs_present(), the exception fixup will handle any access error >> (through send_fault_sig()), so this should continue to work. >> >> Why the special handling of VM_IO pages? Maybe hp300 had marked all IO >> register pages VM_IO to distinguish IO faults from VM faults... >> >> The only other area I can imagine this might have an impact is the Mac's >> pseudo-DMA - FInn might want to give this some testing. >> > > mac_scsi.c and mac_esp.c don't use ioremap(). They rely on head.S: > > mmu_map_eq #0x50000000,#0x03000000,%d3 > > Having said that, I will run some tests if you still think it necessary.
No need for test then, thanks!
Cheers,
Michael
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