MIPS: bpf: Drop update_on_xread and always initialize the X register
authorMarkos Chandras <markos.chandras@imgtec.com>
Mon, 23 Jun 2014 09:38:56 +0000 (10:38 +0100)
committerRalf Baechle <ralf@linux-mips.org>
Thu, 26 Jun 2014 09:48:22 +0000 (10:48 +0100)
commite5bb48b0553d75918094c5a6f7b60a4359887218
tree77ac48000e90b3dc10e1ada667c17d500ff15502
parent10c4d614d2ffcfc17add01f9648c3e530fb308d1
MIPS: bpf: Drop update_on_xread and always initialize the X register

Previously, update_on_xread() only set the reset flag if SEEN_X hasn't
been set already. However, SEEN_X is used to indicate that X is used
as destination or source register so there are some cases where X
is only used as source register and we really need to make sure that it
has been initialized in time. As a result of which, drop this function and
always set X to zero if it's used in any of the opcodes.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7133/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/net/bpf_jit.c