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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2017-02-09 05:58:19 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-02-15 12:02:40 +0300 |
| commit | ca94573b9c69d224e50e1084a2776772f4ea030d (patch) | |
| tree | 6cbe50dc5a4222c9f289819acb92f13eff5bf01b /arch/powerpc/include/asm/book3s/64/pgtable.h | |
| parent | 18061c17c8ecdbdbf1e7d1695ec44e7388b4f601 (diff) | |
| download | linux-ca94573b9c69d224e50e1084a2776772f4ea030d.tar.xz | |
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>
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/pgtable.h')
0 files changed, 0 insertions, 0 deletions