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| author | Jason Gunthorpe <jgg@mellanox.com> | 2020-01-08 18:21:53 +0100 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-01-13 21:17:19 +0100 |
| commit | 6898d1c661d79f4707d8ba82991b2195822780ca (patch) | |
| tree | 9a9beb1ffb18967ab7bf320d686d7705fa1004f7 /drivers/bus | |
| parent | RDMA/uverbs: Remove needs_kfree_rcu from uverbs_obj_type_class (diff) | |
| download | linux-6898d1c661d79f4707d8ba82991b2195822780ca.tar.xz linux-6898d1c661d79f4707d8ba82991b2195822780ca.zip | |
RDMA/mlx5: Use RCU and direct refcounts to keep memory alive
dispatch_event_fd() runs from a notifier with minimal locking, and relies
on RCU and a file refcount to keep the uobject and eventfd alive.
As the next patch wants to remove the file_operations release function
from the drivers, re-organize things so that the devx_event_notifier()
path uses the existing RCU to manage the lifetime of the uobject and
eventfd.
Move the refcount puts to a call_rcu so that the objects are guaranteed to
exist and remove the indirect file refcount.
Link: https://lore.kernel.org/r/1578504126-9400-2-git-send-email-yishaih@mellanox.com
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/bus')
0 files changed, 0 insertions, 0 deletions