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netfilter: nft_last: avoid possible false sharing
authorPablo Neira Ayuso <pablo@netfilter.org>
Sat, 17 Jul 2021 08:20:08 +0000 (10:20 +0200)
committerPablo Neira Ayuso <pablo@netfilter.org>
Fri, 23 Jul 2021 12:18:02 +0000 (14:18 +0200)
commit32953df7a6eb56bd9b8f18a13034d55f9fc96cfa
tree48e2e8efcadc59cd46cd93bb7ee0e8994804cb9etree | snapshot
parent32c3973d808301e7a980f80fee8818fdf7c82b09commit | diff
netfilter: nft_last: avoid possible false sharing

Use the idiom described in:

https://github.com/google/ktsan/wiki/READ_ONCE-and-WRITE_ONCE#it-may-improve-performance

Moreover, prevent a compiler optimization.

Fixes: 836382dc2471 ("netfilter: nf_tables: add last expression")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
net/netfilter/nft_last.c diff | blob | history
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