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authorKeith Busch <keith.busch@intel.com>2015-08-19 14:24:05 -0700
committerJens Axboe <axboe@fb.com>2015-08-19 14:26:02 -0700
commit03100aada96f0645bbcb89aea24c01f02d0ef1fa (patch)
treeba909d035a188206b101ae633f925e18d749f7cc /block/bio.c
parentd2be537c3ba3568acd79cd178327b842e60d035e (diff)
downloadop-kernel-dev-03100aada96f0645bbcb89aea24c01f02d0ef1fa.zip
op-kernel-dev-03100aada96f0645bbcb89aea24c01f02d0ef1fa.tar.gz
block: Replace SG_GAPS with new queue limits mask
The SG_GAPS queue flag caused checks for bio vector alignment against PAGE_SIZE, but the device may have different constraints. This patch adds a queue limits so a driver with such constraints can set to allow requests that would have been unnecessarily split. The new gaps check takes the request_queue as a parameter to simplify the logic around invoking this function. This new limit makes the queue flag redundant, so removing it and all usage. Device-mappers will inherit the correct settings through blk_stack_limits(). Signed-off-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/bio.c')
-rw-r--r--block/bio.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/block/bio.c b/block/bio.c
index 425d6d4..b1f198f 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -742,8 +742,7 @@ int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page
* If the queue doesn't support SG gaps and adding this
* offset would create a gap, disallow it.
*/
- if (q->queue_flags & (1 << QUEUE_FLAG_SG_GAPS) &&
- bvec_gap_to_prev(prev, offset))
+ if (bvec_gap_to_prev(q, prev, offset))
return 0;
}
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