diff options
Diffstat (limited to 'include/linux/percpu-refcount.h')
| -rw-r--r-- | include/linux/percpu-refcount.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/include/linux/percpu-refcount.h b/include/linux/percpu-refcount.h index cd7e20f0fe47..b0293f268cd2 100644 --- a/include/linux/percpu-refcount.h +++ b/include/linux/percpu-refcount.h @@ -63,6 +63,21 @@ enum { __PERCPU_REF_FLAG_BITS = 2, }; +/* @flags for percpu_ref_init() */ +enum { + /* + * Start w/ ref == 1 in atomic mode. Can be switched to percpu + * operation using percpu_ref_switch_to_percpu(). + */ + PERCPU_REF_INIT_ATOMIC = 1 << 0, + + /* + * Start dead w/ ref == 0 in atomic mode. Must be revived with + * percpu_ref_reinit() before used. Implies INIT_ATOMIC. + */ + PERCPU_REF_INIT_DEAD = 1 << 1, +}; + struct percpu_ref { atomic_long_t count; /* @@ -76,7 +91,8 @@ struct percpu_ref { }; int __must_check percpu_ref_init(struct percpu_ref *ref, - percpu_ref_func_t *release, gfp_t gfp); + percpu_ref_func_t *release, unsigned int flags, + gfp_t gfp); void percpu_ref_exit(struct percpu_ref *ref); void percpu_ref_switch_to_atomic(struct percpu_ref *ref, percpu_ref_func_t *confirm_switch); |