Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:
 "Two bug fixes:

   - fix a crash on pre-z10 hardware due to cache-info

   - fix an issue with classic BPF programs in the eBPF JIT"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/cachinfo: add missing facility check to init_cache_level()
  s390/bpf: clear correct BPF accumulator register

diff --git a/arch/s390/kernel/cache.c b/arch/s390/kernel/cache.c
index bff5e3b6d8223b8f9a9c84d8f99235d3d4e648bc..8ba32436effe4b9da0a271ae1ec0ad2a2bd689e7 100644 (file)
--- a/arch/s390/kernel/cache.c
+++ b/arch/s390/kernel/cache.c
@@ -138,6 +138,8 @@ int init_cache_level(unsigned int cpu)
        union cache_topology ct;
        enum cache_type ctype;
 
+       if (!test_facility(34))
+               return -EOPNOTSUPP;
        if (!this_cpu_ci)
                return -EINVAL;
        ct.raw = ecag(EXTRACT_TOPOLOGY, 0, 0);

diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index fee782acc2ee51f6a3aae4b28152ec76981c8350..8d2e5165865f2c27b50fe8b1c6845de45666698a 100644 (file)
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -448,13 +448,13 @@ static void bpf_jit_prologue(struct bpf_jit *jit)
                EMIT6_DISP_LH(0xe3000000, 0x0004, REG_SKB_DATA, REG_0,
                              BPF_REG_1, offsetof(struct sk_buff, data));
        }
-       /* BPF compatibility: clear A (%b7) and X (%b8) registers */
-       if (REG_SEEN(BPF_REG_7))
-               /* lghi %b7,0 */
-               EMIT4_IMM(0xa7090000, BPF_REG_7, 0);
-       if (REG_SEEN(BPF_REG_8))
-               /* lghi %b8,0 */
-               EMIT4_IMM(0xa7090000, BPF_REG_8, 0);
+       /* BPF compatibility: clear A (%b0) and X (%b7) registers */
+       if (REG_SEEN(BPF_REG_A))
+               /* lghi %ba,0 */
+               EMIT4_IMM(0xa7090000, BPF_REG_A, 0);
+       if (REG_SEEN(BPF_REG_X))
+               /* lghi %bx,0 */
+               EMIT4_IMM(0xa7090000, BPF_REG_X, 0);
 }
 
 /*