diff options
| -rw-r--r-- | arch/x86/net/bpf_jit_comp.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c index b0bac2a66eff..e3b1c4b1d550 100644 --- a/arch/x86/net/bpf_jit_comp.c +++ b/arch/x86/net/bpf_jit_comp.c @@ -1305,7 +1305,8 @@ static int emit_atomic_rmw(u8 **pprog, u32 atomic_op, { u8 *prog = *pprog; - EMIT1(0xF0); /* lock prefix */ + if (atomic_op != BPF_XCHG) + EMIT1(0xF0); /* lock prefix */ maybe_emit_mod(&prog, dst_reg, src_reg, bpf_size == BPF_DW); @@ -1347,7 +1348,9 @@ static int emit_atomic_rmw_index(u8 **pprog, u32 atomic_op, u32 size, { u8 *prog = *pprog; - EMIT1(0xF0); /* lock prefix */ + if (atomic_op != BPF_XCHG) + EMIT1(0xF0); /* lock prefix */ + switch (size) { case BPF_W: EMIT1(add_3mod(0x40, dst_reg, src_reg, index_reg)); |