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| author |   Eric Dumazet <edumazet@google.com> | 2016-05-03 16:56:03 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-05-04 16:55:11 -0400 |
| commit | 46cc6e4976e3d9058490f20d93bc7805f7f2d81e (patch) | |
| tree | 5856b8bab06927f7fc934b7f07a272f5ae680d9c /net/ipv4/inet_timewait_sock.c | |
| parent | Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge (diff) | |
| download | linux-dev-46cc6e4976e3d9058490f20d93bc7805f7f2d81e.tar.xz linux-dev-46cc6e4976e3d9058490f20d93bc7805f7f2d81e.zip | |
tcp: fix lockdep splat in tcp_snd_una_update()
tcp_snd_una_update() and tcp_rcv_nxt_update() call
u64_stats_update_begin() either from process context or BH handler.
This triggers a lockdep splat on 32bit & SMP builds.
We could add u64_stats_update_begin_bh() variant but this would
slow down 32bit builds with useless local_disable_bh() and
local_enable_bh() pairs, since we own the socket lock at this point.
I add sock_owned_by_me() helper to have proper lockdep support
even on 64bit builds, and new u64_stats_update_begin_raw()
and u64_stats_update_end_raw methods.
Fixes: c10d9310edf5 ("tcp: do not assume TCP code is non preemptible")
Reported-by: Fabio Estevam <festevam@gmail.com>
Diagnosed-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Tested-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/inet_timewait_sock.c')
0 files changed, 0 insertions, 0 deletions