tree 07a4e6f7b67771d69bc7e67020efe734465a6293
parent 35e455f47ac2e7fbc0c25871a4e91c563ff78ce1
author Michael Holzheu <holzheu@linux.vnet.ibm.com> 1438197314 +0200
committer David S. Miller <davem@davemloft.net> 1438207198 -0700

s390/bpf: clear correct BPF accumulator register

Currently we assumed the following BPF to eBPF register mapping:

 - BPF_REG_A -> BPF_REG_7
 - BPF_REG_X -> BPF_REG_8

Unfortunately this mapping is wrong. The correct mapping is:

 - BPF_REG_A -> BPF_REG_0
 - BPF_REG_X -> BPF_REG_7

So clear the correct registers and use the BPF_REG_A and BPF_REG_X
macros instead of BPF_REG_0/7.

Fixes: 054623105728 ("s390/bpf: Add s390x eBPF JIT compiler backend")
Cc: stable@vger.kernel.org # 4.0+
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>