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| author | Mathias Krause <minipli@googlemail.com> | 2017-09-08 20:57:11 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-27 16:40:23 +0200 |
| commit | 3c74e59f30ccfb4937a9814631cc828f64427de3 (patch) | |
| tree | adbc1afea65fa3d8c9cdf228d1118015d42a6a98 /security | |
| parent | f4fb6f1523d43cd2b56f99559ba4b86b83901a25 (diff) | |
padata: ensure padata_do_serial() runs on the correct CPU
commit 350ef88e7e922354f82a931897ad4a4ce6c686ff upstream.
If the algorithm we're parallelizing is asynchronous we might change
CPUs between padata_do_parallel() and padata_do_serial(). However, we
don't expect this to happen as we need to enqueue the padata object into
the per-cpu reorder queue we took it from, i.e. the same-cpu's parallel
queue.
Ensure we're not switching CPUs for a given padata object by tracking
the CPU within the padata object. If the serial callback gets called on
the wrong CPU, defer invoking padata_reorder() via a kernel worker on
the CPU we're expected to run on.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions