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| author | Mathias Krause <minipli@googlemail.com> | 2017-09-08 21:57:09 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-10-07 07:10:31 +0300 |
| commit | 1bd845bcb41d5b7f83745e0cb99273eb376f2ec5 (patch) | |
| tree | f0f49135d882c6c0d3313587eaf657d7fc926c54 /include | |
| parent | 5e1a646204deb0efd0e0bbc1730ac11dcb39f8fb (diff) | |
| download | linux-1bd845bcb41d5b7f83745e0cb99273eb376f2ec5.tar.xz | |
padata: set cpu_index of unused CPUs to -1
The parallel queue per-cpu data structure gets initialized only for CPUs
in the 'pcpu' CPU mask set. This is not sufficient as the reorder timer
may run on a different CPU and might wrongly decide it's the target CPU
for the next reorder item as per-cpu memory gets memset(0) and we might
be waiting for the first CPU in cpumask.pcpu, i.e. cpu_index 0.
Make the '__this_cpu_read(pd->pqueue->cpu_index) == next_queue->cpu_index'
compare in padata_get_next() fail in this case by initializing the
cpu_index member of all per-cpu parallel queues. Use -1 for unused ones.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions