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authorMartin K. Petersen <martin.petersen@oracle.com>2009-05-22 17:17:51 -0400
committerJens Axboe <jens.axboe@oracle.com>2009-05-22 23:22:55 +0200
commit025146e13b63483add912706c101fb0fb6f015cc (patch)
tree42d2d42e2222f0a2d6373a0ddf0cbf733f75dcba /block/blk-settings.c
parentae03bf639a5027d27270123f5f6e3ee6a412781d (diff)
downloadlinux-2.6.34-ux500-025146e13b63483add912706c101fb0fb6f015cc.tar.gz
block: Move queue limits to an embedded struct
To accommodate stacking drivers that do not have an associated request queue we're moving the limits to a separate, embedded structure. 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.c55
1 files changed, 34 insertions, 21 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c
index 0b32f984eed..b0f547cecfb 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -179,16 +179,16 @@ void blk_queue_bounce_limit(struct request_queue *q, u64 dma_mask)
*/
if (b_pfn < (min_t(u64, 0xffffffffUL, BLK_BOUNCE_HIGH) >> PAGE_SHIFT))
dma = 1;
- q->bounce_pfn = max_low_pfn;
+ q->limits.bounce_pfn = max_low_pfn;
#else
if (b_pfn < blk_max_low_pfn)
dma = 1;
- q->bounce_pfn = b_pfn;
+ q->limits.bounce_pfn = b_pfn;
#endif
if (dma) {
init_emergency_isa_pool();
q->bounce_gfp = GFP_NOIO | GFP_DMA;
- q->bounce_pfn = b_pfn;
+ q->limits.bounce_pfn = b_pfn;
}
}
EXPORT_SYMBOL(blk_queue_bounce_limit);
@@ -211,10 +211,10 @@ void blk_queue_max_sectors(struct request_queue *q, unsigned int max_sectors)
}
if (BLK_DEF_MAX_SECTORS > max_sectors)
- q->max_hw_sectors = q->max_sectors = max_sectors;
+ q->limits.max_hw_sectors = q->limits.max_sectors = max_sectors;
else {
- q->max_sectors = BLK_DEF_MAX_SECTORS;
- q->max_hw_sectors = max_sectors;
+ q->limits.max_sectors = BLK_DEF_MAX_SECTORS;
+ q->limits.max_hw_sectors = max_sectors;
}
}
EXPORT_SYMBOL(blk_queue_max_sectors);
@@ -222,9 +222,9 @@ EXPORT_SYMBOL(blk_queue_max_sectors);
void blk_queue_max_hw_sectors(struct request_queue *q, unsigned int max_sectors)
{
if (BLK_DEF_MAX_SECTORS > max_sectors)
- q->max_hw_sectors = BLK_DEF_MAX_SECTORS;
+ q->limits.max_hw_sectors = BLK_DEF_MAX_SECTORS;
else
- q->max_hw_sectors = max_sectors;
+ q->limits.max_hw_sectors = max_sectors;
}
EXPORT_SYMBOL(blk_queue_max_hw_sectors);
@@ -247,7 +247,7 @@ void blk_queue_max_phys_segments(struct request_queue *q,
__func__, max_segments);
}
- q->max_phys_segments = max_segments;
+ q->limits.max_phys_segments = max_segments;
}
EXPORT_SYMBOL(blk_queue_max_phys_segments);
@@ -271,7 +271,7 @@ void blk_queue_max_hw_segments(struct request_queue *q,
__func__, max_segments);
}
- q->max_hw_segments = max_segments;
+ q->limits.max_hw_segments = max_segments;
}
EXPORT_SYMBOL(blk_queue_max_hw_segments);
@@ -292,7 +292,7 @@ void blk_queue_max_segment_size(struct request_queue *q, unsigned int max_size)
__func__, max_size);
}
- q->max_segment_size = max_size;
+ q->limits.max_segment_size = max_size;
}
EXPORT_SYMBOL(blk_queue_max_segment_size);
@@ -308,7 +308,7 @@ EXPORT_SYMBOL(blk_queue_max_segment_size);
**/
void blk_queue_logical_block_size(struct request_queue *q, unsigned short size)
{
- q->logical_block_size = size;
+ q->limits.logical_block_size = size;
}
EXPORT_SYMBOL(blk_queue_logical_block_size);
@@ -325,14 +325,27 @@ EXPORT_SYMBOL(blk_queue_logical_block_size);
void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b)
{
/* zero is "infinity" */
- t->max_sectors = min_not_zero(t->max_sectors, b->max_sectors);
- t->max_hw_sectors = min_not_zero(t->max_hw_sectors, b->max_hw_sectors);
- t->seg_boundary_mask = min_not_zero(t->seg_boundary_mask, b->seg_boundary_mask);
-
- 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->logical_block_size = max(t->logical_block_size, b->logical_block_size);
+ t->limits.max_sectors = min_not_zero(queue_max_sectors(t),
+ queue_max_sectors(b));
+
+ t->limits.max_hw_sectors = min_not_zero(queue_max_hw_sectors(t),
+ queue_max_hw_sectors(b));
+
+ t->limits.seg_boundary_mask = min_not_zero(queue_segment_boundary(t),
+ queue_segment_boundary(b));
+
+ t->limits.max_phys_segments = min_not_zero(queue_max_phys_segments(t),
+ queue_max_phys_segments(b));
+
+ t->limits.max_hw_segments = min_not_zero(queue_max_hw_segments(t),
+ queue_max_hw_segments(b));
+
+ t->limits.max_segment_size = min_not_zero(queue_max_segment_size(t),
+ queue_max_segment_size(b));
+
+ t->limits.logical_block_size = max(queue_logical_block_size(t),
+ queue_logical_block_size(b));
+
if (!t->queue_lock)
WARN_ON_ONCE(1);
else if (!test_bit(QUEUE_FLAG_CLUSTER, &b->queue_flags)) {
@@ -430,7 +443,7 @@ void blk_queue_segment_boundary(struct request_queue *q, unsigned long mask)
__func__, mask);
}
- q->seg_boundary_mask = mask;
+ q->limits.seg_boundary_mask = mask;
}
EXPORT_SYMBOL(blk_queue_segment_boundary);