[PATCH] decnet: remove macro-local declarations

Julia Lawall
2015-11-05T10:29:45Z

Move the variable declarations from the for_nexthops macro to the
surrounding context, so that it is clear where these variables are
declared. This also makes it possible to remove the endfor_nexthops macro.

This change adds new arguments to the macro for_nexthops. They are ordered
such that a pointer to the referenced object comes first, the index in the
list comes next, and the list itself comes last, roughly in analogy with
the list_for_each macros.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---

This patch takes care of a single file, where the macros are defined
locally. If the basic transformation looks OK, I will change the other
files that either likewise define their own macros or use the macros in
net/mpls/internal.h. The potentially affected files are:

net/decnet/dn_fib.c
net/ipv4/fib_semantics.c
net/mpls/af_mpls.c

net/decnet/dn_table.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/net/decnet/dn_table.c b/net/decnet/dn_table.c
index 1540b50..3e20dbb 100644
--- a/net/decnet/dn_table.c
+++ b/net/decnet/dn_table.c
@@ -60,11 +60,9 @@ struct dn_hash

#define dz_key_0(key) ((key).datum = 0)

-#define for_nexthops(fi) { int nhsel; const struct dn_fib_nh *nh;\
+#define for_nexthops(nh, nhsel, fi) \
for(nhsel = 0, nh = (fi)->fib_nh; nhsel < (fi)->fib_nhs; nh++, nhsel++)

-#define endfor_nexthops(fi) }
-
#define DN_MAX_DIVISOR 1024
#define DN_S_ZOMBIE 1
#define DN_S_ACCESSED 2
@@ -226,8 +224,9 @@ static struct dn_zone *dn_new_zone(struct dn_hash *table, int z)

static int dn_fib_nh_match(struct rtmsg *r, struct nlmsghdr *nlh, struct nlattr *attrs[], struct dn_fib_info *fi)
{
+ const struct dn_fib_nh *nh;
struct rtnexthop *nhp;
- int nhlen;
+ int nhlen, nhsel;

if (attrs[RTA_PRIORITY] &&
nla_get_u32(attrs[RTA_PRIORITY]) != fi->fib_priority)
@@ -246,7 +245,7 @@ static int dn_fib_nh_match(struct rtmsg *r, struct nlmsghdr *nlh, struct nlattr
nhp = nla_data(attrs[RTA_MULTIPATH]);
nhlen = nla_len(attrs[RTA_MULTIPATH]);

- for_nexthops(fi) {
+ for_nexthops(nh, nhsel, fi) {
int attrlen = nhlen - sizeof(struct rtnexthop);
__le16 gw;

@@ -264,7 +263,7 @@ static int dn_fib_nh_match(struct rtmsg *r, struct nlmsghdr *nlh, struct nlattr
return 1;
}
nhp = RTNH_NEXT(nhp);
- } endfor_nexthops(fi);
+ }

return 0;
}
@@ -345,11 +344,13 @@ static int dn_fib_dump_info(struct sk_buff *skb, u32 portid, u32 seq, int event,
if (fi->fib_nhs > 1) {
struct rtnexthop *nhp;
struct nlattr *mp_head;
+ const struct dn_fib_nh *nh;
+ int nhsel;

if (!(mp_head = nla_nest_start(skb, RTA_MULTIPATH)))
goto errout;

- for_nexthops(fi) {
+ for_nexthops(nh, nhsel, fi) {
if (!(nhp = nla_reserve_nohdr(skb, sizeof(*nhp))))
goto errout;

@@ -362,7 +363,7 @@ static int dn_fib_dump_info(struct sk_buff *skb, u32 portid, u32 seq, int event,
goto errout;

nhp->rtnh_len = skb_tail_pointer(skb) - (unsigned char *)nhp;
- } endfor_nexthops(fi);
+ }

nla_nest_end(skb, mp_head);
}