diff options
Diffstat (limited to 'include/linux/blkdev_compat.h')
| -rw-r--r-- | include/linux/blkdev_compat.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/blkdev_compat.h b/include/linux/blkdev_compat.h index 0cb07207e..42b474b15 100644 --- a/include/linux/blkdev_compat.h +++ b/include/linux/blkdev_compat.h @@ -52,6 +52,33 @@ __blk_queue_flush(struct request_queue *q, unsigned int flags) q->flush_flags = flags & (REQ_FLUSH | REQ_FUA); } #endif /* HAVE_BLK_QUEUE_FLUSH && HAVE_BLK_QUEUE_FLUSH_GPL_ONLY */ + +/* + * 4.7 API change, + * The blk_queue_write_cache() interface has replaced blk_queue_flush() + * interface. However, while the new interface is GPL-only. Thus if the + * GPL-only version is detected we implement our own trivial helper + * compatibility funcion. + */ +#if defined(HAVE_BLK_QUEUE_WRITE_CACHE) && \ + defined(HAVE_BLK_QUEUE_WRITE_CACHE_GPL_ONLY) +#define blk_queue_write_cache __blk_queue_write_cache +static inline void +__blk_queue_write_cache(struct request_queue *q, bool wc, bool fua) +{ + spin_lock_irq(q->queue_lock); + if (wc) + queue_flag_set(QUEUE_FLAG_WC, q); + else + queue_flag_clear(QUEUE_FLAG_WC, q); + if (fua) + queue_flag_set(QUEUE_FLAG_FUA, q); + else + queue_flag_clear(QUEUE_FLAG_FUA, q); + spin_unlock_irq(q->queue_lock); +} +#endif + /* * Most of the blk_* macros were removed in 2.6.36. Ostensibly this was * done to improve readability and allow easier grepping. However, from |