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| author | Michael Dalton <mwdalton@google.com> | 2014-01-16 22:23:29 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-16 23:46:06 -0800 |
| commit | 03144b5869d2921dafbea477246aeb5d4eb5fc38 (patch) | |
| tree | c0326022d8ccf711afb495c9c556447dfcf845b7 /lib/percpu_ida.c | |
| parent | a953be53ce40440acb4740edb48577b9468d4c3d (diff) | |
| download | blackbird-op-linux-03144b5869d2921dafbea477246aeb5d4eb5fc38.tar.gz blackbird-op-linux-03144b5869d2921dafbea477246aeb5d4eb5fc38.zip | |
lib: Ensure EWMA does not store wrong intermediate values
To ensure ewma_read() without a lock returns a valid but possibly
out of date average, modify ewma_add() by using ACCESS_ONCE to prevent
intermediate wrong values from being written to avg->internal.
Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Michael Dalton <mwdalton@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/percpu_ida.c')
0 files changed, 0 insertions, 0 deletions
