s390/lib: use expoline for indirect branches

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[ Upstream commit 97489e0663 ]

The return from the memmove, memset, memcpy, __memset16, __memset32 and
__memset64 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 18:22:04 +02:00 • committed by Greg Kroah-Hartman

parent d7aa3f13e1

commit 0d201ff077

1 changed files with 8 additions and 5 deletions

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arch/s390/lib/mem.S

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