powerpc/64: indirect function call use bctrl rather than blrl in ret_from_kernel_thread

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blrl is not recommended to use as an indirect function call, as it may
corrupt the link stack predictor.

This is not a performance critical path but this should be fixed for
consistency.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200611121119.1015740-1-npiggin@gmail.com

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Nicholas Piggin 2020-06-11 22:11:19 +10:00 • committed by Michael Ellerman

parent 48778464bb

commit 89bbe4c798

1 changed files with 2 additions and 2 deletions

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arch/powerpc/kernel/entry_64.S

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