s390/pgtable: introduce and use generic csp inline asm
We have already two inline assemblies which make use of the csp instruction. Since I need a third instance let's introduce a generic inline assmebly which can be used by everyone. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Acked-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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