xfs: rename the bt_bdev_* buftarg fields

The extra bdev_ is weird, so drop it.  Also improve the comment to make
it clear these are the hardware limits.

Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: John Garry <[email protected]>
Reviewed-by: Darrick J. Wong <[email protected]>
Signed-off-by: Carlos Maiolino <[email protected]>

Author: Christoph Hellwig

fs/xfs/xfs_buf.c

@@ -1712,8 +1712,8 @@ xfs_configure_buftarg_atomic_writes(
 		max_bytes = 0;
 	}
 
-	btp->bt_bdev_awu_min = min_bytes;
-	btp->bt_bdev_awu_max = max_bytes;
+	btp->bt_awu_min = min_bytes;
+	btp->bt_awu_max = max_bytes;
 }
 
 /* Configure a buffer target that abstracts a block device. */

fs/xfs/xfs_buf.h

@@ -112,9 +112,9 @@ struct xfs_buftarg {
 	struct percpu_counter	bt_readahead_count;
 	struct ratelimit_state	bt_ioerror_rl;
 
-	/* Atomic write unit values, bytes */
-	unsigned int		bt_bdev_awu_min;
-	unsigned int		bt_bdev_awu_max;
+	/* Hardware atomic write unit values, bytes */
+	unsigned int		bt_awu_min;
+	unsigned int		bt_awu_max;
 
 	/* built-in cache, if we're not using the perag one */
 	struct xfs_buf_cache	bt_cache[];

fs/xfs/xfs_file.c

@@ -752,7 +752,7 @@ xfs_file_dio_write_atomic(
 	 * HW offload should be faster, so try that first if it is already
 	 * known that the write length is not too large.
 	 */
-	if (ocount > xfs_inode_buftarg(ip)->bt_bdev_awu_max)
+	if (ocount > xfs_inode_buftarg(ip)->bt_awu_max)
 		dops = &xfs_atomic_write_cow_iomap_ops;
 	else
 		dops = &xfs_direct_write_iomap_ops;

fs/xfs/xfs_inode.h

@@ -358,7 +358,7 @@ static inline bool xfs_inode_has_bigrtalloc(const struct xfs_inode *ip)
 
 static inline bool xfs_inode_can_hw_atomic_write(const struct xfs_inode *ip)
 {
-	return xfs_inode_buftarg(ip)->bt_bdev_awu_max > 0;
+	return xfs_inode_buftarg(ip)->bt_awu_max > 0;
 }
 
 /*

fs/xfs/xfs_iomap.c

@@ -827,7 +827,7 @@ xfs_bmap_hw_atomic_write_possible(
 	/*
 	 * The ->iomap_begin caller should ensure this, but check anyway.
 	 */
-	return len <= xfs_inode_buftarg(ip)->bt_bdev_awu_max;
+	return len <= xfs_inode_buftarg(ip)->bt_awu_max;
 }
 
 static int

fs/xfs/xfs_iops.c

@@ -665,7 +665,7 @@ xfs_get_atomic_write_max_opt(
 	 * less than our out of place write limit, but we don't want to exceed
 	 * the awu_max.
 	 */
-	return min(awu_max, xfs_inode_buftarg(ip)->bt_bdev_awu_max);
+	return min(awu_max, xfs_inode_buftarg(ip)->bt_awu_max);
 }
 
 static void

fs/xfs/xfs_mount.c

@@ -699,7 +699,7 @@ xfs_calc_group_awu_max(
 
 	if (g->blocks == 0)
 		return 0;
-	if (btp && btp->bt_bdev_awu_min > 0)
+	if (btp && btp->bt_awu_min > 0)
 		return max_pow_of_two_factor(g->blocks);
 	return rounddown_pow_of_two(g->blocks);
 }