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| author | Liam R. Howlett <Liam.Howlett@Oracle.com> | 2023-04-11 18:10:52 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-04-13 17:55:39 +0300 |
| commit | d3af5f8a50dd75f4d071e00c16d9ac3f0ae3858f (patch) | |
| tree | 0105be80ef0ec586541a27763156480ad98f356e /lib | |
| parent | cc2f2507f3f05612c61c4b8f11bb91efbb9ad495 (diff) | |
| download | linux-d3af5f8a50dd75f4d071e00c16d9ac3f0ae3858f.tar.xz | |
maple_tree: remove extra smp_wmb() from mas_dead_leaves()
commit 8372f4d83f96f35915106093cde4565836587123 upstream.
The call to mte_set_dead_node() before the smp_wmb() already calls
smp_wmb() so this is not needed. This is an optimization for the RCU mode
of the maple tree.
Link: https://lkml.kernel.org/r/20230227173632.3292573-5-surenb@google.com
Fixes: 54a611b60590 ("Maple Tree: add new data structure")
Cc: stable@vger.kernel.org
Signed-off-by: Liam Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/maple_tree.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/lib/maple_tree.c b/lib/maple_tree.c index 7f451e0c6fba..f7c204904b8f 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -5495,7 +5495,6 @@ unsigned char mas_dead_leaves(struct ma_state *mas, void __rcu **slots, break; mte_set_node_dead(entry); - smp_wmb(); /* Needed for RCU */ node->type = type; rcu_assign_pointer(slots[offset], node); } |