s390/crc32-vx: use expoline for indirect branches

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[ Upstream commit 467a3bf219 ]

The return from the crc32_le_vgfm_16/crc32c_le_vgfm_16 and the
crc32_be_vgfm_16 functions are done with "br %r14". These are indirect
branches as well and need to use execute trampolines for CONFIG_EXPOLINE=y.

Cc: stable@vger.kernel.org # 4.16
Fixes: f19fbd5ed6 ("s390: introduce execute-trampolines for branches")
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Martin Schwidefsky 2018-05-23 18:22:03 +02:00 • committed by Greg Kroah-Hartman

parent e3ad546e60

commit d7aa3f13e1

2 changed files with 7 additions and 2 deletions

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arch/s390/crypto/crc32be-vx.S

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4

arch/s390/crypto/crc32le-vx.S

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