35 lines
986 B
Diff
35 lines
986 B
Diff
From: Sven Eckelmann <sven@narfation.org>
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Date: Fri, 14 May 2021 19:34:35 +0200
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Subject: batman-adv: Fix build of multicast code against Linux < 5.13
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Fixes: 007b4c4b031f ("batman-adv: convert ifmcaddr6 to RCU")
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Signed-off-by: Sven Eckelmann <sven@narfation.org>
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--- a/net/batman-adv/multicast.c
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+++ b/net/batman-adv/multicast.c
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@@ -422,9 +422,14 @@ batadv_mcast_mla_softif_get_ipv6(struct
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return 0;
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}
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+#if LINUX_VERSION_IS_LESS(5, 13, 0)
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+ read_lock_bh(&in6_dev->lock);
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+ for (pmc6 = in6_dev->mc_list; pmc6; pmc6 = pmc6->next) {
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+#else
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for (pmc6 = rcu_dereference(in6_dev->mc_list);
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pmc6;
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pmc6 = rcu_dereference(pmc6->next)) {
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+#endif
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if (IPV6_ADDR_MC_SCOPE(&pmc6->mca_addr) <
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IPV6_ADDR_SCOPE_LINKLOCAL)
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continue;
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@@ -453,6 +458,9 @@ batadv_mcast_mla_softif_get_ipv6(struct
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hlist_add_head(&new->list, mcast_list);
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ret++;
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}
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+#if LINUX_VERSION_IS_LESS(5, 13, 0)
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+ read_unlock_bh(&in6_dev->lock);
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+#endif
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rcu_read_unlock();
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return ret;
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