powerpc/64s: Don't unbalance the return branch predictor in __replay_interrupt()

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The __replay_interrupt() code is branched to with bl, but the caller is
returned to directly with rfid from the interrupt.

Instead, rfid to a stub that returns to the caller with blr, which
should keep the return branch predictor balanced.

Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Nicholas Piggin 2017-06-13 23:05:49 +10:00 • committed by Michael Ellerman

parent a9af97aa0a

commit b48bbb82e2

1 changed files with 7 additions and 1 deletions

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arch/powerpc/kernel/exceptions-64s.S

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