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| author | Duoming Zhou <duoming@zju.edu.cn> | 2024-05-09 11:36:33 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-05-14 01:09:38 +0200 |
| commit | a7d6e36b9ad052926ba2ecba3a59d8bb67dabcb4 (patch) | |
| tree | 87e77f1b8faedbce60e03a092e63dff26c2bb340 /include/net | |
| parent | net: usb: ax88179_178a: fix link status when link is set to down/up (diff) | |
| download | linux-a7d6e36b9ad052926ba2ecba3a59d8bb67dabcb4.tar.xz linux-a7d6e36b9ad052926ba2ecba3a59d8bb67dabcb4.zip | |
ax25: Use kernel universal linked list to implement ax25_dev_list
The origin ax25_dev_list implements its own single linked list,
which is complicated and error-prone. For example, when deleting
the node of ax25_dev_list in ax25_dev_device_down(), we have to
operate on the head node and other nodes separately.
This patch uses kernel universal linked list to replace original
ax25_dev_list, which make the operation of ax25_dev_list easier.
We should do "dev->ax25_ptr = ax25_dev;" and "dev->ax25_ptr = NULL;"
while holding the spinlock, otherwise the ax25_dev_device_up() and
ax25_dev_device_down() could race.
Suggested-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/85bba3af651ca0e1a519da8d0d715b949891171c.1715247018.git.duoming@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/ax25.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/net/ax25.h b/include/net/ax25.h index 0d939e5aee4e..c2a85fd3f5ea 100644 --- a/include/net/ax25.h +++ b/include/net/ax25.h @@ -216,7 +216,7 @@ typedef struct { struct ctl_table; typedef struct ax25_dev { - struct ax25_dev *next; + struct list_head list; struct net_device *dev; netdevice_tracker dev_tracker; @@ -330,7 +330,6 @@ int ax25_addr_size(const ax25_digi *); void ax25_digi_invert(const ax25_digi *, ax25_digi *); /* ax25_dev.c */ -extern ax25_dev *ax25_dev_list; extern spinlock_t ax25_dev_lock; #if IS_ENABLED(CONFIG_AX25) |