s390/bpf: clear correct BPF accumulator register
authorMichael Holzheu <holzheu@linux.vnet.ibm.com>
Wed, 29 Jul 2015 19:15:14 +0000 (21:15 +0200)
committerDavid S. Miller <davem@davemloft.net>
Wed, 29 Jul 2015 21:59:58 +0000 (14:59 -0700)
commitf75298f5c3fee750ad170bb98556e366a45a4093
tree07a4e6f7b67771d69bc7e67020efe734465a6293
parent35e455f47ac2e7fbc0c25871a4e91c563ff78ce1
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>
arch/s390/net/bpf_jit_comp.c