netdev - [PATCH RFC net-next 3/9] net/ipv6: Remove temp variables in ipv6_create

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Date:   Wed, 23 May 2018 15:57:21 -0700
From:   dsahern@...nel.org
To:     netdev@...r.kernel.org
Cc:     roopa@...ulusnetworks.com, David Ahern <dsahern@...il.com>
Subject: [PATCH RFC net-next 3/9] net/ipv6: Remove temp variables in ipv6_create_tempaddr

From: David Ahern <dsahern@...il.com>

Remove temp variables in favor of ifa6_config struct.

Signed-off-by: David Ahern <dsahern@...il.com>
---
 net/ipv6/addrconf.c | 26 +++++++++-----------------
 1 file changed, 9 insertions(+), 17 deletions(-)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index eff925b2064e..4988f2265882 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1258,12 +1258,10 @@ static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp,
 {
 	struct inet6_dev *idev = ifp->idev;
 	struct in6_addr addr, *tmpaddr;
-	unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age;
+	unsigned long tmp_tstamp, age;
 	unsigned long regen_advance;
 	struct ifa6_config cfg;
-	int tmp_plen;
 	int ret = 0;
-	u32 addr_flags;
 	unsigned long now = jiffies;
 	long max_desync_factor;
 	s32 cnf_temp_preferred_lft;
@@ -1325,13 +1323,12 @@ static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp,
 		}
 	}
 
-	tmp_valid_lft = min_t(__u32,
-			      ifp->valid_lft,
+	cfg.valid_lft = min_t(__u32, ifp->valid_lft,
 			      idev->cnf.temp_valid_lft + age);
-	tmp_prefered_lft = cnf_temp_preferred_lft + age -
-			    idev->desync_factor;
-	tmp_prefered_lft = min_t(__u32, ifp->prefered_lft, tmp_prefered_lft);
-	tmp_plen = ifp->prefix_len;
+	cfg.preferred_lft = cnf_temp_preferred_lft + age - idev->desync_factor;
+	cfg.preferred_lft = min_t(__u32, ifp->prefered_lft, cfg.preferred_lft);
+
+	cfg.plen = ifp->prefix_len;
 	tmp_tstamp = ifp->tstamp;
 	spin_unlock_bh(&ifp->lock);
 
@@ -1345,24 +1342,19 @@ static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp,
 	 * temporary addresses being generated.
 	 */
 	age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
-	if (tmp_prefered_lft <= regen_advance + age) {
+	if (cfg.preferred_lft <= regen_advance + age) {
 		in6_ifa_put(ifp);
 		in6_dev_put(idev);
 		ret = -1;
 		goto out;
 	}
 
-	addr_flags = IFA_F_TEMPORARY;
+	cfg.ifa_flags = IFA_F_TEMPORARY;
 	/* set in addrconf_prefix_rcv() */
 	if (ifp->flags & IFA_F_OPTIMISTIC)
-		addr_flags |= IFA_F_OPTIMISTIC;
+		cfg.ifa_flags |= IFA_F_OPTIMISTIC;
 
 	cfg.pfx = &addr;
-	cfg.plen = tmp_plen;
-	cfg.peer_pfx = NULL;
-	cfg.ifa_flags = addr_flags;
-	cfg.preferred_lft = tmp_prefered_lft;
-	cfg.valid_lft = tmp_valid_lft;
 	cfg.scope = ipv6_addr_scope(cfg.pfx);
 
 	ift = ipv6_add_addr(idev, &cfg, block, NULL);
-- 
2.11.0