netdev - [PATCH v4 net-next 3/6] ila: Call library function alloc_bucket

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Date:   Fri, 15 Dec 2017 10:27:57 -0800
From:   Tom Herbert <tom@...ntonium.net>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, roopa@...ulusnetworks.com,
        rohit@...ntonium.net, Tom Herbert <tom@...ntonium.net>
Subject: [PATCH v4 net-next 3/6] ila: Call library function alloc_bucket_locks

To allocate the array of bucket locks for the hash table we now
call library function alloc_bucket_spinlocks.

Signed-off-by: Tom Herbert <tom@...ntonium.net>
---
 net/ipv6/ila/ila_xlat.c | 22 +++++-----------------
 1 file changed, 5 insertions(+), 17 deletions(-)

diff --git a/net/ipv6/ila/ila_xlat.c b/net/ipv6/ila/ila_xlat.c
index 887dd5b785b5..3ef8869ac508 100644
--- a/net/ipv6/ila/ila_xlat.c
+++ b/net/ipv6/ila/ila_xlat.c
@@ -31,26 +31,14 @@ struct ila_net {
 	bool hooks_registered;
 };
 
+#define MAX_LOCKS 1024
 #define	LOCKS_PER_CPU 10
 
 static int alloc_ila_locks(struct ila_net *ilan)
 {
-	unsigned int i, size;
-	unsigned int nr_pcpus = num_possible_cpus();
-
-	nr_pcpus = min_t(unsigned int, nr_pcpus, 32UL);
-	size = roundup_pow_of_two(nr_pcpus * LOCKS_PER_CPU);
-
-	if (sizeof(spinlock_t) != 0) {
-		ilan->locks = kvmalloc(size * sizeof(spinlock_t), GFP_KERNEL);
-		if (!ilan->locks)
-			return -ENOMEM;
-		for (i = 0; i < size; i++)
-			spin_lock_init(&ilan->locks[i]);
-	}
-	ilan->locks_mask = size - 1;
-
-	return 0;
+	return alloc_bucket_spinlocks(&ilan->xlat.locks, &ilan->xlat.locks_mask,
+				      MAX_LOCKS, LOCKS_PER_CPU,
+				      GFP_KERNEL);
 }
 
 static u32 hashrnd __read_mostly;
@@ -639,7 +627,7 @@ static __net_exit void ila_exit_net(struct net *net)
 
 	rhashtable_free_and_destroy(&ilan->rhash_table, ila_free_cb, NULL);
 
-	kvfree(ilan->locks);
+	free_bucket_spinlocks(ilan->xlat.locks);
 
 	if (ilan->hooks_registered)
 		nf_unregister_net_hooks(net, ila_nf_hook_ops,
-- 
2.11.0