diff options
Diffstat (limited to 'block/blk.h')
| -rw-r--r-- | block/blk.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/block/blk.h b/block/blk.h index 63035c95689c..aed99cbc1bca 100644 --- a/block/blk.h +++ b/block/blk.h @@ -149,6 +149,20 @@ static inline void blk_queue_enter_live(struct request_queue *q) percpu_ref_get(&q->q_usage_counter); } +#ifndef ARCH_BIOVEC_PHYS_MERGEABLE +#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) true +#endif + +static inline bool biovec_phys_mergeable(const struct bio_vec *vec1, + const struct bio_vec *vec2) +{ + if (bvec_to_phys(vec1) + vec1->bv_len != bvec_to_phys(vec2)) + return false; + if (!ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2)) + return false; + return true; +} + static inline bool __bvec_gap_to_prev(struct request_queue *q, struct bio_vec *bprv, unsigned int offset) { |