linux/arch/powerpc/include
Aneesh Kumar K.V ca94573b9c powerpc/mm/radix: Update pte update sequence for pte clear case
In the kernel we do follow the below sequence in different code paths.
pte = ptep_get_clear(ptep)
....
set_pte_at(ptep, pte)

We do that for mremap, autonuma protection update and softdirty clearing. This
implies our optimization to skip a tlb flush when clearing a pte update is
not valid, because for DD1 system that followup set_pte_at will be done witout
doing the required tlbflush. Fix that by always doing the dd1 style pte update
irrespective of new_pte value. In a later patch we will optimize the application
exit case.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Tested-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-02-15 20:02:40 +11:00
..
asm powerpc/mm/radix: Update pte update sequence for pte clear case 2017-02-15 20:02:40 +11:00
uapi/asm Merge branch 'topic/ppc-kvm' into next 2017-02-14 17:18:29 +11:00