powerpc/64: Convert the syscall exit path to use RFI_TO_USER/KERNEL

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commit b8e90cb7bc upstream.

In the syscall exit path we may be returning to user or kernel
context. We already have a test for that, because we conditionally
restore r13. So use that existing test and branch, and bifurcate the
return based on that.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Nicholas Piggin 2018-01-10 03:07:15 +11:00 • committed by Greg Kroah-Hartman

parent 11caf810bd

commit 627700e455

1 changed files with 11 additions and 1 deletions

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arch/powerpc/kernel/entry_64.S

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