diff options
| -rw-r--r-- | docs/rcu.txt | 11 | ||||
| -rw-r--r-- | include/qemu/rcu.h | 8 |
2 files changed, 15 insertions, 4 deletions
diff --git a/docs/rcu.txt b/docs/rcu.txt index 61752b93ab..21ecb8106c 100644 --- a/docs/rcu.txt +++ b/docs/rcu.txt @@ -120,12 +120,15 @@ The core RCU API is small: void call_rcu(T *p, void (*func)(T *p), field-name); + void g_free_rcu(T *p, + field-name); - call_rcu1 is typically used through this macro, in the common case - where the "struct rcu_head" is the first field in the struct. In - the above case, one could have written simply: + call_rcu1 is typically used through these macro, in the common case + where the "struct rcu_head" is the first field in the struct. If + the callback function is g_free, in particular, g_free_rcu can be + used. In the above case, one could have written simply: - call_rcu(foo_reclaim, g_free, rcu); + g_free_rcu(foo_reclaim, rcu); typeof(*p) atomic_rcu_read(p); diff --git a/include/qemu/rcu.h b/include/qemu/rcu.h index 068a279a79..506ab58eaf 100644 --- a/include/qemu/rcu.h +++ b/include/qemu/rcu.h @@ -140,6 +140,14 @@ extern void call_rcu1(struct rcu_head *head, RCUCBFunc *func); }), \ (RCUCBFunc *)(func)) +#define g_free_rcu(obj, field) \ + call_rcu1(({ \ + char __attribute__((unused)) \ + offset_must_be_zero[-offsetof(typeof(*(obj)), field)]; \ + &(obj)->field; \ + }), \ + (RCUCBFunc *)g_free); + #ifdef __cplusplus } #endif |