diff options
| author | David Matlack <dmatlack@google.com> | 2026-04-23 17:40:28 +0000 |
|---|---|---|
| committer | Mike Rapoport (Microsoft) <rppt@kernel.org> | 2026-06-01 02:31:38 +0300 |
| commit | d2850ff2f8c5acda4c1097aa53c006a75b091f2c (patch) | |
| tree | 0da4afc74df3ab3683ce7973a6484f6c7259de44 /include/linux | |
| parent | a1f8ed3451ff64f6907fbbd6eb5ca4dff1e2a503 (diff) | |
liveupdate: Use refcount_t for FLB reference counts
Use refcount_t instead of a raw integer to keep track of references on
incoming and outgoing FLBs. Using refcount_t provides protection from
overflow, underflow, and other issues.
Fixes: cab056f2aae7 ("liveupdate: luo_flb: introduce File-Lifecycle-Bound global state")
Signed-off-by: David Matlack <dmatlack@google.com>
Reviewed-by: Samiullah Khawaja <skhawaja@google.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Link: https://lore.kernel.org/r/20260423174032.3140399-2-dmatlack@google.com
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/liveupdate.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/liveupdate.h b/include/linux/liveupdate.h index 30c5a39ff9e9..8d3bbc35c828 100644 --- a/include/linux/liveupdate.h +++ b/include/linux/liveupdate.h @@ -12,6 +12,7 @@ #include <linux/kho/abi/luo.h> #include <linux/list.h> #include <linux/mutex.h> +#include <linux/refcount.h> #include <linux/rwsem.h> #include <linux/types.h> #include <uapi/linux/liveupdate.h> @@ -175,7 +176,7 @@ struct liveupdate_flb_ops { * @retrieved: True once the FLB's retrieve() callback has run. */ struct luo_flb_private_state { - long count; + refcount_t count; u64 data; void *obj; struct mutex lock; |