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powerpc/64: Convert fast_exception_return to use RFI_TO_USER/KERNEL
authorNicholas Piggin <npiggin@gmail.com>
Tue, 9 Jan 2018 16:07:15 +0000 (03:07 +1100)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 9 Jan 2018 16:07:32 +0000 (03:07 +1100)
commita08f828cf47e6c605af21d2cdec68f84e799c318
tree348e809ca069dfcb7b570fa00490ddbc3e830c1etree | snapshot
parentb8e90cb7bc04a509e821e82ab6ed7a8ef11ba333commit | diff
powerpc/64: Convert fast_exception_return to use RFI_TO_USER/KERNEL

Similar to the syscall return path, in fast_exception_return 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>
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