sctp: convert sctp_assoc_set_id() to use idr_alloc_cyclic()
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Cc: Sridhar Samudrala <sri@us.ibm.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index d2709e2..fa261a3 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -66,13 +66,6 @@
static void sctp_assoc_free_asconf_acks(struct sctp_association *asoc);
static void sctp_assoc_free_asconf_queue(struct sctp_association *asoc);
-/* Keep track of the new idr low so that we don't re-use association id
- * numbers too fast. It is protected by they idr spin lock is in the
- * range of 1 - INT_MAX.
- */
-static u32 idr_low = 1;
-
-
/* 1st Level Abstractions. */
/* Initialize a new association from provided memory. */
@@ -1601,13 +1594,8 @@
if (preload)
idr_preload(gfp);
spin_lock_bh(&sctp_assocs_id_lock);
- /* 0 is not a valid id, idr_low is always >= 1 */
- ret = idr_alloc(&sctp_assocs_id, asoc, idr_low, 0, GFP_NOWAIT);
- if (ret >= 0) {
- idr_low = ret + 1;
- if (idr_low == INT_MAX)
- idr_low = 1;
- }
+ /* 0 is not a valid assoc_id, must be >= 1 */
+ ret = idr_alloc_cyclic(&sctp_assocs_id, asoc, 1, 0, GFP_NOWAIT);
spin_unlock_bh(&sctp_assocs_id_lock);
if (preload)
idr_preload_end();