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Heiko Carstens authored
The key member of the runtime instrumentation control block contains only the access key, not the complete storage key. Therefore the value must be shifted by four bits. Since existing user space does not necessarily query and set the access key correctly, just ignore the user space provided key and use the correct one. Note: this is only relevant for debugging purposes in case somebody compiles a kernel with a default storage access key set to a value not equal to zero. Fixes: 262832bc ("s390/ptrace: add runtime instrumention register get/set") Reported-by:
Claudio Imbrenda <imbrenda@linux.ibm.com> Signed-off-by:
Heiko Carstens <hca@linux.ibm.com>
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