block: Consolidate phys_segment and hw_segment limits

Except for SCSI no device drivers distinguish between physical and
hardware segment limits.  Consolidate the two into a single segment
limit.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

2 files changed, 17 insertions, 12 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 57bc48446e92..ebd22dbed861 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -316,8 +316,7 @@ struct queue_limits {
         unsigned int            discard_alignment;
 
         unsigned short          logical_block_size;
-        unsigned short          max_hw_segments;
-        unsigned short          max_phys_segments;
+        unsigned short          max_segments;
 
         unsigned char           misaligned;
         unsigned char           discard_misaligned;
@@ -929,8 +928,19 @@ static inline void blk_queue_max_sectors(struct request_queue *q, unsigned int m
         blk_queue_max_hw_sectors(q, max);
 }
 
-extern void blk_queue_max_phys_segments(struct request_queue *, unsigned short);
-extern void blk_queue_max_hw_segments(struct request_queue *, unsigned short);
+extern void blk_queue_max_segments(struct request_queue *, unsigned short);
+
+static inline void blk_queue_max_phys_segments(struct request_queue *q, unsigned short max)
+{
+        blk_queue_max_segments(q, max);
+}
+
+static inline void blk_queue_max_hw_segments(struct request_queue *q, unsigned short max)
+{
+        blk_queue_max_segments(q, max);
+}
+
+
 extern void blk_queue_max_segment_size(struct request_queue *, unsigned int);
 extern void blk_queue_max_discard_sectors(struct request_queue *q,
                 unsigned int max_discard_sectors);
@@ -1055,14 +1065,9 @@ static inline unsigned int queue_max_hw_sectors(struct request_queue *q)
         return q->limits.max_hw_sectors;
 }
 
-static inline unsigned short queue_max_hw_segments(struct request_queue *q)
-{
-        return q->limits.max_hw_segments;
-}
-
-static inline unsigned short queue_max_phys_segments(struct request_queue *q)
+static inline unsigned short queue_max_segments(struct request_queue *q)
 {
-        return q->limits.max_phys_segments;
+        return q->limits.max_segments;
 }
 
 static inline unsigned int queue_max_segment_size(struct request_queue *q)
diff --git a/include/linux/i2o.h b/include/linux/i2o.h
index 4c4e57d1f19d..87018dc5527d 100644
--- a/include/linux/i2o.h
+++ b/include/linux/i2o.h
@@ -385,7 +385,7 @@
 /* defines for max_sectors and max_phys_segments */
 #define I2O_MAX_SECTORS                 1024
 #define I2O_MAX_SECTORS_LIMITED         128
-#define I2O_MAX_PHYS_SEGMENTS           MAX_PHYS_SEGMENTS
+#define I2O_MAX_PHYS_SEGMENTS           BLK_MAX_SEGMENTS
 
 /*
  *      Message structures