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authorMartin K. Petersen <martin.petersen@oracle.com>2009-05-22 17:17:49 -0400
committerJens Axboe <jens.axboe@oracle.com>2009-05-22 23:22:54 +0200
commite1defc4ff0cf57aca6c5e3ff99fa503f5943c1f1 (patch)
treed60d15a082171c58ac811d547d51a9c3119f23e3 /block/blk-settings.c
parent9bd7de51ee8537094656149eaf45338cadb7d7d4 (diff)
downloadlinux-2.6.34-ux500-e1defc4ff0cf57aca6c5e3ff99fa503f5943c1f1.tar.gz
block: Do away with the notion of hardsect_size
Until now we have had a 1:1 mapping between storage device physical block size and the logical block sized used when addressing the device. With SATA 4KB drives coming out that will no longer be the case. The sector size will be 4KB but the logical block size will remain 512-bytes. Hence we need to distinguish between the physical block size and the logical ditto. This patch renames hardsect_size to logical_block_size. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-settings.c')
-rw-r--r--block/blk-settings.c21
1 files changed, 10 insertions, 11 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c
index 57af728d94b..15c3164537b 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -134,7 +134,7 @@ void blk_queue_make_request(struct request_queue *q, make_request_fn *mfn)
q->backing_dev_info.state = 0;
q->backing_dev_info.capabilities = BDI_CAP_MAP_COPY;
blk_queue_max_sectors(q, SAFE_MAX_SECTORS);
- blk_queue_hardsect_size(q, 512);
+ blk_queue_logical_block_size(q, 512);
blk_queue_dma_alignment(q, 511);
blk_queue_congestion_threshold(q);
q->nr_batching = BLK_BATCH_REQ;
@@ -288,21 +288,20 @@ void blk_queue_max_segment_size(struct request_queue *q, unsigned int max_size)
EXPORT_SYMBOL(blk_queue_max_segment_size);
/**
- * blk_queue_hardsect_size - set hardware sector size for the queue
+ * blk_queue_logical_block_size - set logical block size for the queue
* @q: the request queue for the device
- * @size: the hardware sector size, in bytes
+ * @size: the logical block size, in bytes
*
* Description:
- * This should typically be set to the lowest possible sector size
- * that the hardware can operate on (possible without reverting to
- * even internal read-modify-write operations). Usually the default
- * of 512 covers most hardware.
+ * This should be set to the lowest possible block size that the
+ * storage device can address. The default of 512 covers most
+ * hardware.
**/
-void blk_queue_hardsect_size(struct request_queue *q, unsigned short size)
+void blk_queue_logical_block_size(struct request_queue *q, unsigned short size)
{
- q->hardsect_size = size;
+ q->logical_block_size = size;
}
-EXPORT_SYMBOL(blk_queue_hardsect_size);
+EXPORT_SYMBOL(blk_queue_logical_block_size);
/*
* Returns the minimum that is _not_ zero, unless both are zero.
@@ -324,7 +323,7 @@ void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b)
t->max_phys_segments = min_not_zero(t->max_phys_segments, b->max_phys_segments);
t->max_hw_segments = min_not_zero(t->max_hw_segments, b->max_hw_segments);
t->max_segment_size = min_not_zero(t->max_segment_size, b->max_segment_size);
- t->hardsect_size = max(t->hardsect_size, b->hardsect_size);
+ t->logical_block_size = max(t->logical_block_size, b->logical_block_size);
if (!t->queue_lock)
WARN_ON_ONCE(1);
else if (!test_bit(QUEUE_FLAG_CLUSTER, &b->queue_flags)) {