diff options
| author |   Jason Gunthorpe <jgg@nvidia.com> | 2022-09-29 11:59:25 -0300 |
|---|---|---|
| committer |   Alex Williamson <alex.williamson@redhat.com> | 2022-10-04 12:06:58 -0600 |
| commit | c82e81ab2569559ad873b3061217c2f37560682b (patch) | |
| tree | 3cdb8747c5bbe641a1f0811aaa403dbc7364ff28 /drivers/vfio/vfio.h | |
| parent | vfio: Remove the vfio_group->users and users_comp (diff) | |
| download | linux-dev-c82e81ab2569559ad873b3061217c2f37560682b.tar.xz linux-dev-c82e81ab2569559ad873b3061217c2f37560682b.zip | |
vfio: Change vfio_group->group_rwsem to a mutex
These days not much is using the read side:
- device first open
- ioctl_get_status
- device FD release
- check enforced_coherent
None of this is performance, so just make it into a normal mutex.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/2-v1-917e3647f123+b1a-vfio_group_users_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/vfio.h')
| -rw-r--r-- | drivers/vfio/vfio.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h index 78b362a92501..4a1bac1359a9 100644 --- a/drivers/vfio/vfio.h +++ b/drivers/vfio/vfio.h @@ -56,7 +56,7 @@ struct vfio_group { struct list_head vfio_next; struct list_head container_next; enum vfio_group_type type; - struct rw_semaphore group_rwsem; + struct mutex group_lock; struct kvm *kvm; struct file *opened_file; struct swait_queue_head opened_file_wait; |