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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-09 09:11:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-09 09:11:21 +0200 |
| commit | 0154ec71d597692a0d0682b19eac4b3adfb7f3dc (patch) | |
| tree | 121b4ac35146f5696da090d3ae2534c76523e6c2 /kernel/bpf/devmap.c | |
| parent | 9c3cef54c50d93871eaa46c28a06de8bd03fab63 (diff) | |
| parent | d1fdb6d8f6a4109a4263176c84b899076a5f8008 (diff) | |
Merge 5.2-rc4 into char-misc-next
We want the char/misc driver fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/bpf/devmap.c')
| -rw-r--r-- | kernel/bpf/devmap.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c index 191b79948424..15dbc15c5b0c 100644 --- a/kernel/bpf/devmap.c +++ b/kernel/bpf/devmap.c @@ -1,13 +1,5 @@ +// SPDX-License-Identifier: GPL-2.0-only /* Copyright (c) 2017 Covalent IO, Inc. http://covalent.io - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. */ /* Devmaps primary use is as a backend map for XDP BPF helper call @@ -164,6 +156,9 @@ static void dev_map_free(struct bpf_map *map) bpf_clear_redirect_map(map); synchronize_rcu(); + /* Make sure prior __dev_map_entry_free() have completed. */ + rcu_barrier(); + /* To ensure all pending flush operations have completed wait for flush * bitmap to indicate all flush_needed bits to be zero on _all_ cpus. * Because the above synchronize_rcu() ensures the map is disconnected |