diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2024-06-20 15:21:56 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-06-24 16:41:22 -0700 |
| commit | ebad6d0334793f16a16e5320182f665292a31e0c (patch) | |
| tree | 5f9bc37dcc2190e3cb37cde94f9b84ad2e5b8d59 /include/net | |
| parent | 585aa621af6cd11d3d6f830965af3e45ee79ea51 (diff) | |
net/ipv4: Use nested-BH locking for ipv4_tcp_sk.
ipv4_tcp_sk is a per-CPU variable and relies on disabled BH for its
locking. Without per-CPU locking in local_bh_disable() on PREEMPT_RT
this data structure requires explicit locking.
Make a struct with a sock member (original ipv4_tcp_sk) and a
local_lock_t and use local_lock_nested_bh() for locking. This change
adds only lockdep coverage and does not alter the functional behaviour
for !PREEMPT_RT.
Cc: David Ahern <dsahern@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/20240620132727.660738-7-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/sock.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index b30ea0c342a6..cce23ac4d514 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -544,6 +544,11 @@ struct sock { netns_tracker ns_tracker; }; +struct sock_bh_locked { + struct sock *sock; + local_lock_t bh_lock; +}; + enum sk_pacing { SK_PACING_NONE = 0, SK_PACING_NEEDED = 1, |