tree 0ebadb7e7d100f4aebeb137ad04d09e96abbaff3
parent 7afad422ac61067473d5f3d20bbd5472af533bcd
author Benjamin Herrenschmidt <benh@kernel.crashing.org> 1500439764 +1000
committer Michael Ellerman <mpe@ellerman.id.au> 1501643467 +1000

powerpc/mm: Pre-filter SRR1 bits before do_page_fault()

By filtering the relevant SRR1 bits in the assembly rather than
in do_page_fault() itself, we avoid a conditional branch (since we
already come from different path for data and instruction faults).

This will allow more simplifications later

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>