diff options
Diffstat (limited to 'include/linux/ptr_ring.h')
| -rw-r--r-- | include/linux/ptr_ring.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/ptr_ring.h b/include/linux/ptr_ring.h index 9a72d8fec50e..f17584680b79 100644 --- a/include/linux/ptr_ring.h +++ b/include/linux/ptr_ring.h @@ -45,9 +45,10 @@ struct ptr_ring { }; /* Note: callers invoking this in a loop must use a compiler barrier, - * for example cpu_relax(). If ring is ever resized, callers must hold - * producer_lock - see e.g. ptr_ring_full. Otherwise, if callers don't hold - * producer_lock, the next call to __ptr_ring_produce may fail. + * for example cpu_relax(). + * + * NB: this is unlike __ptr_ring_empty in that callers must hold producer_lock: + * see e.g. ptr_ring_full. */ static inline bool __ptr_ring_full(struct ptr_ring *r) { |