diff options
| author | Xu Yilun <yilun.xu@linux.intel.com> | 2025-07-16 10:03:49 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2025-07-18 23:33:08 +0300 |
| commit | ab6bc44159d8f0c4ee757e0ce041fa9033e0ead8 (patch) | |
| tree | a511faa6929db958e5475365496345810f9071a4 /include/linux | |
| parent | 39a369c34152e1b76895fda37aa586dfb9b2cf38 (diff) | |
| download | linux-ab6bc44159d8f0c4ee757e0ce041fa9033e0ead8.tar.xz | |
iommufd: Rename some shortterm-related identifiers
Rename the shortterm-related identifiers to wait-related.
The usage of shortterm_users refcount is now beyond its name. It is
also used for references which live longer than an ioctl execution.
E.g. vdev holds idev's shortterm_users refcount on vdev allocation,
releases it during idev's pre_destroy(). Rename the refcount as
wait_cnt, since it is always used to sync the referencing & the
destruction of the object by waiting for it to go to zero.
List all changed identifiers:
iommufd_object::shortterm_users -> iommufd_object::wait_cnt
REMOVE_WAIT_SHORTTERM -> REMOVE_WAIT
iommufd_object_dec_wait_shortterm() -> iommufd_object_dec_wait()
zerod_shortterm -> zerod_wait_cnt
No functional change intended.
Link: https://patch.msgid.link/r/20250716070349.1807226-9-yilun.xu@linux.intel.com
Suggested-by: Kevin Tian <kevin.tian@intel.com>
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/iommufd.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index 810e4d8ac912..6e7efe83bc5d 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -46,7 +46,13 @@ enum iommufd_object_type { /* Base struct for all objects with a userspace ID handle. */ struct iommufd_object { - refcount_t shortterm_users; + /* + * Destroy will sleep and wait for wait_cnt to go to zero. This allows + * concurrent users of the ID to reliably avoid causing a spurious + * destroy failure. Incrementing this count should either be short + * lived or be revoked and blocked during pre_destroy(). + */ + refcount_t wait_cnt; refcount_t users; enum iommufd_object_type type; unsigned int id; |