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According to the architecture all instructions are suppressing if memory access is prohibited due to DAT protection, unless stated otherwise for an instruction. The lctl[g]/stctl[g] implementations handled this incorrectly since control register handling was done piecemeal, which means they had terminating instead of suppressing semantics. This patch fixes this. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>