diff options
| -rw-r--r-- | fs/xfs/xfs_buf.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 830e2f6c064a..f5f2b71c2fde 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -347,6 +347,18 @@ extern void xfs_buf_terminate(void); void xfs_buf_set_ref(struct xfs_buf *bp, int lru_ref); +/* + * If the buffer is already on the LRU, do nothing. Otherwise set the buffer + * up with a reference count of 0 so it will be tossed from the cache when + * released. + */ +static inline void xfs_buf_oneshot(struct xfs_buf *bp) +{ + if (!list_empty(&bp->b_lru) || atomic_read(&bp->b_lru_ref) > 1) + return; + atomic_set(&bp->b_lru_ref, 0); +} + static inline int xfs_buf_ispinned(struct xfs_buf *bp) { return atomic_read(&bp->b_pin_count); |