diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
index f3254a4f4cb4bf5ea7417bb1a0364143890f98d3..04ce361688f777f6c8e43ab14d4b7d003de15e83 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -612,7 +612,7 @@ xfs_inode_validate_extsize(
 	 */
 
 	if (rt_flag)
-		blocksize_bytes = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
+		blocksize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
 	else
 		blocksize_bytes = mp->m_sb.sb_blocksize;
 
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index dfe24b7f26e5a3d1decceaf8850bec67c30da667..93c082db04b78c0d01ad2c901072eefe29d8b49a 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -543,7 +543,7 @@ xfs_stat_blksize(
 	 * always return the realtime extent size.
 	 */
 	if (XFS_IS_REALTIME_INODE(ip))
-		return xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
+		return XFS_FSB_TO_B(mp, xfs_get_extsz_hint(ip));
 
 	/*
 	 * Allow large block sizes to be reported to userspace programs if the
@@ -560,7 +560,7 @@ xfs_stat_blksize(
 	 */
 	if (mp->m_flags & XFS_MOUNT_LARGEIO) {
 		if (mp->m_swidth)
-			return mp->m_swidth << mp->m_sb.sb_blocklog;
+			return XFS_FSB_TO_B(mp, mp->m_swidth);
 		if (mp->m_flags & XFS_MOUNT_ALLOCSIZE)
 			return 1U << mp->m_allocsize_log;
 	}