Commit 9eaba29c authored by Heiko Carstens's avatar Heiko Carstens
Browse files

s390/runtime_instrumentation: fix storage key handling 



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.
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: e4b8b3f3 ("s390: add support for runtime instrumentation")
Reported-by: default avatarClaudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent b76fee1b

arch/s390/kernel/runtime_instr.c

+1 −1
Original line number Diff line number Diff line
@@ -57,7 +57,7 @@ static void init_runtime_instr_cb(struct runtime_instr_cb *cb) 
	cb->k = 1;

	cb->ps = 1;

	cb->pc = 1;

	cb->key = PAGE_DEFAULT_KEY;

	cb->key = PAGE_DEFAULT_KEY >> 4;

	cb->v = 1;

}