net: filter: Fix some minor issues in sparc JIT.

Correct conventions comments.  %o4 and %o5 were swapped,
%g3 was not documented.

Use r_TMP instead of r_SKB_DATA + r_OFF where possible in
assembler stubs.

Correct discussion of %o4 and %o5 in one of bpf_jit_compile()'s
comments.

Based upon feedback from Richard Mortimer.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/arch/sparc/net/bpf_jit.h b/arch/sparc/net/bpf_jit.h
index 74f048be739c..05175be442fb 100644
--- a/arch/sparc/net/bpf_jit.h
+++ b/arch/sparc/net/bpf_jit.h
@@ -4,13 +4,14 @@
 /* Conventions:
  *  %g1 : temporary
  *  %g2 : Secondary temporary used by SKB data helper stubs.
+ *  %g3 : packet offset passed into SKB data helper stubs.
  *  %o0 : pointer to skb (first argument given to JIT function)
  *  %o1 : BPF A accumulator
  *  %o2 : BPF X accumulator
  *  %o3 : Holds saved %o7 so we can call helper functions without needing
  *        to allocate a register window.
- *  %o4 : skb->data
- *  %o5 : skb->len - skb->data_len
+ *  %o4 : skb->len - skb->data_len
+ *  %o5 : skb->data
  */
 
 #ifndef __ASSEMBLER__