[IPSEC]: Make x->lastused an unsigned long

Currently x->lastused is u64 which means that it cannot be
read/written atomically on all architectures.  David Miller observed
that the value stored in it is only an unsigned long which is always
atomic.

So based on his suggestion this patch changes the internal
representation from u64 to unsigned long while the user-interface
still refers to it as u64.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 3 insertions, 5 deletions

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 329de412c0ba..311bbd113aa7 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -183,7 +183,7 @@ struct xfrm_state
         struct timer_list       timer;
 
         /* Last used time */
-        u64                     lastused;
+        unsigned long           lastused;
 
         /* Reference to data common to all the instances of this
          * transformer. */
diff --git a/net/ipv6/xfrm6_mode_ro.c b/net/ipv6/xfrm6_mode_ro.c
index 4a01cb3c370b..63d5d493098a 100644
--- a/net/ipv6/xfrm6_mode_ro.c
+++ b/net/ipv6/xfrm6_mode_ro.c
@@ -54,9 +54,7 @@ static int xfrm6_ro_output(struct xfrm_state *x, struct sk_buff *skb)
         __skb_pull(skb, hdr_len);
         memmove(ipv6_hdr(skb), iph, hdr_len);
 
-        spin_lock_bh(&x->lock);
         x->lastused = get_seconds();
-        spin_unlock_bh(&x->lock);
 
         return 0;
 }
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index c4f6419b1769..6424e5360511 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1986,8 +1986,8 @@ static inline size_t xfrm_sa_len(struct xfrm_state *x)
         if (x->coaddr)
                 l += nla_total_size(sizeof(*x->coaddr));
 
-        /* Must count this as this may become non-zero behind our back. */
-        l += nla_total_size(sizeof(x->lastused));
+        /* Must count x->lastused as it may become non-zero behind our back. */
+        l += nla_total_size(sizeof(u64));
 
         return l;
 }