powerpc/mm: Overhaul handling of bad page faults

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A bad page fault is when the HW signals an error such as a bad
copy/paste, an AMO error, or some other type of error that will
not be fixed by updating the PTE.

Use a helper page_fault_is_bad() to check for bad page faults thus
removing the per-processor family open-coding in __do_page_fault()
and trigger a SIGBUS rather than a SIGSEGV which is more appropriate.

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

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Benjamin Herrenschmidt 2017-07-19 14:49:31 +10:00 • committed by Michael Ellerman

parent e6c8290a89

commit f3d96e698e

1 changed files with 14 additions and 18 deletions

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arch/powerpc/mm/fault.c

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