From: Sven Eckelmann <sven@narfation.org>
To: b.a.t.m.a.n@lists.open-mesh.org
Cc: Sven Eckelmann <sven@narfation.org>
Subject: [PATCH] batman-adv: Switch to type-aware kmalloc-family helpers
Date: Mon, 16 Feb 2026 20:52:44 +0100 [thread overview]
Message-ID: <20260216-alloc_obj-v1-1-4d72b5f32e2d@narfation.org> (raw)
The commit 2932ba8d9c99 ("slab: Introduce kmalloc_obj() and family")
introduced helpers to provide type information to the allocator. At the
same time, the open-coding of kmalloc assignments was deprecated.
Use the new helpers to benefit from the future enhancements in the
allocator/validator infrastructure.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
compat-include/linux/slab.h | 29 +++++++++++++++++++++++++++++
compat-include/net/addrconf.h | 2 +-
net/batman-adv/bat_v_elp.c | 2 +-
net/batman-adv/bridge_loop_avoidance.c | 4 ++--
net/batman-adv/distributed-arp-table.c | 5 ++---
net/batman-adv/fragmentation.c | 2 +-
net/batman-adv/gateway_client.c | 2 +-
net/batman-adv/hard-interface.c | 2 +-
net/batman-adv/hash.c | 7 +++----
net/batman-adv/mesh-interface.c | 2 +-
net/batman-adv/multicast.c | 6 +++---
net/batman-adv/originator.c | 12 ++++++------
net/batman-adv/send.c | 2 +-
net/batman-adv/tp_meter.c | 6 +++---
net/batman-adv/tvlv.c | 2 +-
15 files changed, 56 insertions(+), 29 deletions(-)
diff --git a/compat-include/linux/slab.h b/compat-include/linux/slab.h
new file mode 100644
index 00000000..4211278e
--- /dev/null
+++ b/compat-include/linux/slab.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This file contains macros for maintaining compatibility with older versions
+ * of the Linux kernel.
+ */
+
+#ifndef _NET_BATMAN_ADV_COMPAT_LINUX_SLAB_H_
+#define _NET_BATMAN_ADV_COMPAT_LINUX_SLAB_H_
+
+#include <linux/version.h>
+#include_next <linux/slab.h>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(7, 1, 0)
+
+#define kzalloc_obj(P, GFP) \
+ kzalloc(sizeof(P), GFP)
+
+#define kmalloc_obj(P, GFP) \
+ kmalloc(sizeof(P), GFP)
+
+#define kmalloc_objs(P, COUNT, GFP) \
+ kmalloc_array((COUNT), sizeof(P), GFP)
+
+#endif /* < KERNEL_VERSION(7, 1, 0) */
+
+#endif /* _NET_BATMAN_ADV_COMPAT_LINUX_SLAB_H_ */
diff --git a/compat-include/net/addrconf.h b/compat-include/net/addrconf.h
index f0a3c0a6..2e48813a 100644
--- a/compat-include/net/addrconf.h
+++ b/compat-include/net/addrconf.h
@@ -61,7 +61,7 @@ compat_batadv_mcast_mla_meshif_get_ipv6(struct net_device *dev,
if (batadv_mcast_mla_is_duplicate(mcast_addr, mcast_list))
continue;
- new = kmalloc(sizeof(*new), GFP_ATOMIC);
+ new = kmalloc_obj(*new, GFP_ATOMIC);
if (!new) {
ret = -ENOMEM;
break;
diff --git a/net/batman-adv/bat_v_elp.c b/net/batman-adv/bat_v_elp.c
index cb16c1ed..2ce4e5bf 100644
--- a/net/batman-adv/bat_v_elp.c
+++ b/net/batman-adv/bat_v_elp.c
@@ -355,7 +355,7 @@ static void batadv_v_elp_periodic_work(struct work_struct *work)
* context. Therefore add it to metric_queue and process it
* outside rcu protected context.
*/
- metric_entry = kzalloc(sizeof(*metric_entry), GFP_ATOMIC);
+ metric_entry = kzalloc_obj(*metric_entry, GFP_ATOMIC);
if (!metric_entry) {
batadv_hardif_neigh_put(hardif_neigh);
continue;
diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index 3dc791c1..49ae92b9 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -505,7 +505,7 @@ batadv_bla_get_backbone_gw(struct batadv_priv *bat_priv, const u8 *orig,
"%s(): not found (%pM, %d), creating new entry\n", __func__,
orig, batadv_print_vid(vid));
- entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
+ entry = kzalloc_obj(*entry, GFP_ATOMIC);
if (!entry)
return NULL;
@@ -699,7 +699,7 @@ static void batadv_bla_add_claim(struct batadv_priv *bat_priv,
/* create a new claim entry if it does not exist yet. */
if (!claim) {
- claim = kzalloc(sizeof(*claim), GFP_ATOMIC);
+ claim = kzalloc_obj(*claim, GFP_ATOMIC);
if (!claim)
return;
diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c
index 8b8132eb..3efc4cf5 100644
--- a/net/batman-adv/distributed-arp-table.c
+++ b/net/batman-adv/distributed-arp-table.c
@@ -381,7 +381,7 @@ static void batadv_dat_entry_add(struct batadv_priv *bat_priv, __be32 ip,
goto out;
}
- dat_entry = kmalloc(sizeof(*dat_entry), GFP_ATOMIC);
+ dat_entry = kmalloc_obj(*dat_entry, GFP_ATOMIC);
if (!dat_entry)
goto out;
@@ -635,8 +635,7 @@ batadv_dat_select_candidates(struct batadv_priv *bat_priv, __be32 ip_dst,
if (!bat_priv->orig_hash)
return NULL;
- res = kmalloc_array(BATADV_DAT_CANDIDATES_NUM, sizeof(*res),
- GFP_ATOMIC);
+ res = kmalloc_objs(*res, BATADV_DAT_CANDIDATES_NUM, GFP_ATOMIC);
if (!res)
return NULL;
diff --git a/net/batman-adv/fragmentation.c b/net/batman-adv/fragmentation.c
index cc14bc41..f4e45cc2 100644
--- a/net/batman-adv/fragmentation.c
+++ b/net/batman-adv/fragmentation.c
@@ -156,7 +156,7 @@ static bool batadv_frag_insert_packet(struct batadv_orig_node *orig_node,
seqno = ntohs(frag_packet->seqno);
bucket = seqno % BATADV_FRAG_BUFFER_COUNT;
- frag_entry_new = kmalloc(sizeof(*frag_entry_new), GFP_ATOMIC);
+ frag_entry_new = kmalloc_obj(*frag_entry_new, GFP_ATOMIC);
if (!frag_entry_new)
goto err;
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index 7a11b245..51e9c081 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -332,7 +332,7 @@ static void batadv_gw_node_add(struct batadv_priv *bat_priv,
if (gateway->bandwidth_down == 0)
return;
- gw_node = kzalloc(sizeof(*gw_node), GFP_ATOMIC);
+ gw_node = kzalloc_obj(*gw_node, GFP_ATOMIC);
if (!gw_node)
return;
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 5113f879..7b7640f3 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -871,7 +871,7 @@ batadv_hardif_add_interface(struct net_device *net_dev)
if (!batadv_is_valid_iface(net_dev))
return NULL;
- hard_iface = kzalloc(sizeof(*hard_iface), GFP_ATOMIC);
+ hard_iface = kzalloc_obj(*hard_iface, GFP_ATOMIC);
if (!hard_iface)
return NULL;
diff --git a/net/batman-adv/hash.c b/net/batman-adv/hash.c
index 8016e619..759fa291 100644
--- a/net/batman-adv/hash.c
+++ b/net/batman-adv/hash.c
@@ -45,16 +45,15 @@ struct batadv_hashtable *batadv_hash_new(u32 size)
{
struct batadv_hashtable *hash;
- hash = kmalloc(sizeof(*hash), GFP_ATOMIC);
+ hash = kmalloc_obj(*hash, GFP_ATOMIC);
if (!hash)
return NULL;
- hash->table = kmalloc_array(size, sizeof(*hash->table), GFP_ATOMIC);
+ hash->table = kmalloc_objs(*hash->table, size, GFP_ATOMIC);
if (!hash->table)
goto free_hash;
- hash->list_locks = kmalloc_array(size, sizeof(*hash->list_locks),
- GFP_ATOMIC);
+ hash->list_locks = kmalloc_objs(*hash->list_locks, size, GFP_ATOMIC);
if (!hash->list_locks)
goto free_table;
diff --git a/net/batman-adv/mesh-interface.c b/net/batman-adv/mesh-interface.c
index 9d72fcdc..50c26037 100644
--- a/net/batman-adv/mesh-interface.c
+++ b/net/batman-adv/mesh-interface.c
@@ -555,7 +555,7 @@ int batadv_meshif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid)
return -EEXIST;
}
- vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
+ vlan = kzalloc_obj(*vlan, GFP_ATOMIC);
if (!vlan) {
spin_unlock_bh(&bat_priv->meshif_vlan_list_lock);
return -ENOMEM;
diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c
index 2d5244a1..7dba0c2b 100644
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@@ -406,7 +406,7 @@ batadv_mcast_mla_meshif_get_ipv4(struct net_device *dev,
if (batadv_mcast_mla_is_duplicate(mcast_addr, mcast_list))
continue;
- new = kmalloc(sizeof(*new), GFP_ATOMIC);
+ new = kmalloc_obj(*new, GFP_ATOMIC);
if (!new) {
ret = -ENOMEM;
break;
@@ -479,7 +479,7 @@ batadv_mcast_mla_meshif_get_ipv6(struct net_device *dev,
if (batadv_mcast_mla_is_duplicate(mcast_addr, mcast_list))
continue;
- new = kmalloc(sizeof(*new), GFP_ATOMIC);
+ new = kmalloc_obj(*new, GFP_ATOMIC);
if (!new) {
ret = -ENOMEM;
break;
@@ -639,7 +639,7 @@ static int batadv_mcast_mla_bridge_get(struct net_device *dev,
if (batadv_mcast_mla_is_duplicate(mcast_addr, mcast_list))
continue;
- new = kmalloc(sizeof(*new), GFP_ATOMIC);
+ new = kmalloc_obj(*new, GFP_ATOMIC);
if (!new) {
ret = -ENOMEM;
break;
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index a662408a..b3468cca 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -179,7 +179,7 @@ batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node,
if (vlan)
goto out;
- vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
+ vlan = kzalloc_obj(*vlan, GFP_ATOMIC);
if (!vlan)
goto out;
@@ -417,7 +417,7 @@ batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node,
if (orig_ifinfo)
goto out;
- orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC);
+ orig_ifinfo = kzalloc_obj(*orig_ifinfo, GFP_ATOMIC);
if (!orig_ifinfo)
goto out;
@@ -495,7 +495,7 @@ batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh,
if (neigh_ifinfo)
goto out;
- neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC);
+ neigh_ifinfo = kzalloc_obj(*neigh_ifinfo, GFP_ATOMIC);
if (!neigh_ifinfo)
goto out;
@@ -575,7 +575,7 @@ batadv_hardif_neigh_create(struct batadv_hard_iface *hard_iface,
if (hardif_neigh)
goto out;
- hardif_neigh = kzalloc(sizeof(*hardif_neigh), GFP_ATOMIC);
+ hardif_neigh = kzalloc_obj(*hardif_neigh, GFP_ATOMIC);
if (!hardif_neigh)
goto out;
@@ -683,7 +683,7 @@ batadv_neigh_node_create(struct batadv_orig_node *orig_node,
if (!hardif_neigh)
goto out;
- neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC);
+ neigh_node = kzalloc_obj(*neigh_node, GFP_ATOMIC);
if (!neigh_node)
goto out;
@@ -947,7 +947,7 @@ struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv,
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Creating new originator: %pM\n", addr);
- orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC);
+ orig_node = kzalloc_obj(*orig_node, GFP_ATOMIC);
if (!orig_node)
return NULL;
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index 20d85c68..60cd67ec 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -503,7 +503,7 @@ batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming,
return NULL;
}
- forw_packet = kmalloc(sizeof(*forw_packet), GFP_ATOMIC);
+ forw_packet = kmalloc_obj(*forw_packet, GFP_ATOMIC);
if (!forw_packet)
goto err;
diff --git a/net/batman-adv/tp_meter.c b/net/batman-adv/tp_meter.c
index 350b149e..2e42f6b3 100644
--- a/net/batman-adv/tp_meter.c
+++ b/net/batman-adv/tp_meter.c
@@ -967,7 +967,7 @@ void batadv_tp_start(struct batadv_priv *bat_priv, const u8 *dst,
return;
}
- tp_vars = kmalloc(sizeof(*tp_vars), GFP_ATOMIC);
+ tp_vars = kmalloc_obj(*tp_vars, GFP_ATOMIC);
if (!tp_vars) {
spin_unlock_bh(&bat_priv->tp_list_lock);
batadv_dbg(BATADV_DBG_TP_METER, bat_priv,
@@ -1228,7 +1228,7 @@ static bool batadv_tp_handle_out_of_order(struct batadv_tp_vars *tp_vars,
u32 payload_len;
bool added = false;
- new = kmalloc(sizeof(*new), GFP_ATOMIC);
+ new = kmalloc_obj(*new, GFP_ATOMIC);
if (unlikely(!new))
return false;
@@ -1343,7 +1343,7 @@ batadv_tp_init_recv(struct batadv_priv *bat_priv,
goto out_unlock;
}
- tp_vars = kmalloc(sizeof(*tp_vars), GFP_ATOMIC);
+ tp_vars = kmalloc_obj(*tp_vars, GFP_ATOMIC);
if (!tp_vars)
goto out_unlock;
diff --git a/net/batman-adv/tvlv.c b/net/batman-adv/tvlv.c
index 76dff1f9..8129a3f9 100644
--- a/net/batman-adv/tvlv.c
+++ b/net/batman-adv/tvlv.c
@@ -557,7 +557,7 @@ void batadv_tvlv_handler_register(struct batadv_priv *bat_priv,
return;
}
- tvlv_handler = kzalloc(sizeof(*tvlv_handler), GFP_ATOMIC);
+ tvlv_handler = kzalloc_obj(*tvlv_handler, GFP_ATOMIC);
if (!tvlv_handler) {
spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);
return;
---
base-commit: 35208d1234584c536db431441445ce82f09273f6
change-id: 20260216-alloc_obj-d15ba4f6032e
Best regards,
--
Sven Eckelmann <sven@narfation.org>
reply other threads:[~2026-02-16 19:53 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260216-alloc_obj-v1-1-4d72b5f32e2d@narfation.org \
--to=sven@narfation.org \
--cc=b.a.t.m.a.n@lists.open-mesh.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox