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| author | Hauke Mehrtens <hauke@hauke-m.de> | 2021-05-02 16:43:29 +0200 |
|---|---|---|
| committer | Hauke Mehrtens <hauke@hauke-m.de> | 2021-05-04 00:07:06 +0200 |
| commit | af75673fe969d61b6c5a4b8e5025b069e1c3088d (patch) | |
| tree | 2e14207daeb017c44f8c2ce99f5aaf22d450c1c8 | |
| parent | 4519ca6dbb4beb132d479d2f1d74937e2c1c36e6 (diff) | |
| download | backports-af75673fe969d61b6c5a4b8e5025b069e1c3088d.tar.gz | |
headers: Add skb_queue_len_lockless()
This function is copied from the mainline kernel. It was introduced in
commit 86b18aaa2b5b ("skbuff: fix a data race in skb_queue_len()").
This function is now used by ath10k.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
| -rw-r--r-- | backport/backport-include/linux/skbuff.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/backport/backport-include/linux/skbuff.h b/backport/backport-include/linux/skbuff.h index 3286d36c..338f6fdb 100644 --- a/backport/backport-include/linux/skbuff.h +++ b/backport/backport-include/linux/skbuff.h @@ -427,4 +427,24 @@ static inline void nf_reset_ct(struct sk_buff *skb) (skb) = (next_skb), (next_skb) = (skb) ? (skb)->next : NULL) #endif +#if LINUX_VERSION_IS_LESS(5,6,0) && \ + !LINUX_VERSION_IN_RANGE(5,4,69, 5,5,0) && \ + !LINUX_VERSION_IN_RANGE(4,19,149, 4,20,0) && \ + !LINUX_VERSION_IN_RANGE(4,14,200, 4,15,0) && \ + !LINUX_VERSION_IN_RANGE(4,9,238, 4,10,0) && \ + !LINUX_VERSION_IN_RANGE(4,4,238, 4,5,0) +/** + * skb_queue_len_lockless - get queue length + * @list_: list to measure + * + * Return the length of an &sk_buff queue. + * This variant can be used in lockless contexts. + */ +#define skb_queue_len_lockless LINUX_BACKPORT(skb_queue_len_lockless) +static inline __u32 skb_queue_len_lockless(const struct sk_buff_head *list_) +{ + return READ_ONCE(list_->qlen); +} +#endif /* < 5.6.0 */ + #endif /* __BACKPORT_SKBUFF_H */ |