rculist: Add hlist_nulls_replace_rcu() and hlist_nulls_replace_init_rcu()

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[ Upstream commit 9c4609225e ]

Add two functions to atomically replace RCU-protected hlist_nulls entries.

Keep using WRITE_ONCE() to assign values to ->next and ->pprev, as
mentioned in the patch below:
commit efd04f8a8b ("rcu: Use WRITE_ONCE() for assignments to ->next for
rculist_nulls")
commit 860c8802ac ("rcu: Use WRITE_ONCE() for assignments to ->pprev for
hlist_nulls")

Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Xuanqiang Luo <luoxuanqiang@kylinos.cn>
Link: https://patch.msgid.link/20251015020236.431822-2-xuanqiang.luo@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 1532ed0d07 ("inet: Avoid ehash lookup race in inet_ehash_insert()")
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Xuanqiang Luo 2025-10-15 10:02:34 +08:00 • committed by Greg Kroah-Hartman

parent d96461c6c6

commit 6b9cbefb73

1 changed files with 59 additions and 0 deletions

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include/linux/rculist_nulls.h

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