From 2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c Mon Sep 17 00:00:00 2001 From: Sang-Heon Jeon Date: Mon, 24 Aug 2026 01:18:14 +0900 Subject: coccinelle: alloc_cast: drop removed allocators - pci_alloc_consistent() and pci_zalloc_consistent() were removed by commit 7968778914e5 ("PCI: Remove the deprecated "pci-dma-compat.h" API") - kmem_alloc() was removed by commit f078d4ea8276 ("xfs: convert kmem_alloc() to kmalloc()") - kmem_zalloc() was removed by commit 10634530f7ba ("xfs: convert kmem_zalloc() to kzalloc()") - kmem_zone_alloc() and kmem_zone_zalloc() were removed by commit bae633a4a283 ("xfs: remove xfs_zone_{alloc,zalloc} helpers") So drop them from the rules. No functional change. Signed-off-by: Sang-Heon Jeon Signed-off-by: Julia Lawall --- Documentation/networking/6lowpan.rst | 53 ++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 Documentation/networking/6lowpan.rst (limited to 'Documentation/networking/6lowpan.rst') diff --git a/Documentation/networking/6lowpan.rst b/Documentation/networking/6lowpan.rst new file mode 100644 index 000000000..e70a6520c --- /dev/null +++ b/Documentation/networking/6lowpan.rst @@ -0,0 +1,53 @@ +.. SPDX-License-Identifier: GPL-2.0 + +============================================== +Netdev private dataroom for 6lowpan interfaces +============================================== + +All 6lowpan able net devices, means all interfaces with ARPHRD_6LOWPAN, +must have "struct lowpan_priv" placed at beginning of netdev_priv. + +The priv_size of each interface should be calculate by:: + + dev->priv_size = LOWPAN_PRIV_SIZE(LL_6LOWPAN_PRIV_DATA); + +Where LL_PRIV_6LOWPAN_DATA is sizeof linklayer 6lowpan private data struct. +To access the LL_PRIV_6LOWPAN_DATA structure you can cast:: + + lowpan_priv(dev)-priv; + +to your LL_6LOWPAN_PRIV_DATA structure. + +Before registering the lowpan netdev interface you must run:: + + lowpan_netdev_setup(dev, LOWPAN_LLTYPE_FOOBAR); + +wheres LOWPAN_LLTYPE_FOOBAR is a define for your 6LoWPAN linklayer type of +enum lowpan_lltypes. + +Example to evaluate the private usually you can do:: + + static inline struct lowpan_priv_foobar * + lowpan_foobar_priv(struct net_device *dev) + { + return (struct lowpan_priv_foobar *)lowpan_priv(dev)->priv; + } + + switch (dev->type) { + case ARPHRD_6LOWPAN: + lowpan_priv = lowpan_priv(dev); + /* do great stuff which is ARPHRD_6LOWPAN related */ + switch (lowpan_priv->lltype) { + case LOWPAN_LLTYPE_FOOBAR: + /* do 802.15.4 6LoWPAN handling here */ + lowpan_foobar_priv(dev)->bar = foo; + break; + ... + } + break; + ... + } + +In case of generic 6lowpan branch ("net/6lowpan") you can remove the check +on ARPHRD_6LOWPAN, because you can be sure that these function are called +by ARPHRD_6LOWPAN interfaces. -- cgit v1.3.1