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| author | Jason Gunthorpe <jgg@mellanox.com> | 2020-03-10 12:49:09 -0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-03-10 12:49:09 -0300 |
| commit | 6f00a54c2cdc82543d5804b0074821b5a40e577f (patch) | |
| tree | a145ce5a9eee817c69633ac64b7635ef5afd4e42 /kernel/trace/blktrace.c | |
| parent | 3e3cf2e82cca92ecedba972251a20da4fa4ab1c8 (diff) | |
| parent | 2c523b344dfa65a3738e7039832044aa133c75fb (diff) | |
Merge tag 'v5.6-rc5' into rdma.git for-next
Required due to dependencies in following patches.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'kernel/trace/blktrace.c')
| -rw-r--r-- | kernel/trace/blktrace.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index 4560878f0bac..ca39dc3230cb 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -1896,8 +1896,11 @@ static ssize_t sysfs_blk_trace_attr_store(struct device *dev, } ret = 0; - if (bt == NULL) + if (bt == NULL) { ret = blk_trace_setup_queue(q, bdev); + bt = rcu_dereference_protected(q->blk_trace, + lockdep_is_held(&q->blk_trace_mutex)); + } if (ret == 0) { if (attr == &dev_attr_act_mask) |