s390: move expoline assembler macros to a header

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[ Upstream commit 6dd85fbb87 ]

To be able to use the expoline branches in different assembler
files move the associated macros from entry.S to a new header
nospec-insn.h.

While we are at it make the macros a bit nicer to use.

Cc: stable@vger.kernel.org # 4.16
Fixes: f19fbd5ed6 ("s390: introduce execute-trampolines for branches")
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 18:22:02 +02:00 • committed by Greg Kroah-Hartman

parent 9a38169fb6

commit e3ad546e60

2 changed files with 149 additions and 81 deletions

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125

arch/s390/include/asm/nospec-insn.h

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105

arch/s390/kernel/entry.S

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