xfs: remove the l_iclog_size_log field from struct xlog

This field is never used, so we can simply kill it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

fs/xfs/xfs_log.c

@@ -1307,7 +1307,6 @@ xlog_get_iclog_buffer_size(
 	struct xfs_mount	*mp,
 	struct xlog		*log)
 {
-	int size;
 	int xhdrs;
 
 	if (mp->m_logbufs <= 0)
@@ -1319,13 +1318,6 @@ xlog_get_iclog_buffer_size(
 	 * Buffer size passed in from mount system call.
 	 */
 	if (mp->m_logbsize > 0) {
-		size = log->l_iclog_size = mp->m_logbsize;
-		log->l_iclog_size_log = 0;
-		while (size != 1) {
-			log->l_iclog_size_log++;
-			size >>= 1;
-		}
-
 		if (xfs_sb_version_haslogv2(&mp->m_sb)) {
 			/* # headers = size / 32k
 			 * one header holds cycles from 32k of data
@@ -1346,7 +1338,6 @@ xlog_get_iclog_buffer_size(
 
 	/* All machines use 32kB buffers by default. */
 	log->l_iclog_size = XLOG_BIG_RECORD_BSIZE;
-	log->l_iclog_size_log = XLOG_BIG_RECORD_BSHIFT;
 
 	/* the default log size is 16k or 32k which is one header sector */
 	log->l_iclog_hsize = BBSIZE;

fs/xfs/xfs_log_priv.h

@@ -361,7 +361,6 @@ struct xlog {
 	int			l_iclog_heads;  /* # of iclog header sectors */
 	uint			l_sectBBsize;   /* sector size in BBs (2^n) */
 	int			l_iclog_size;	/* size of log in bytes */
-	int			l_iclog_size_log; /* log power size of log */
 	int			l_iclog_bufs;	/* number of iclog buffers */
 	xfs_daddr_t		l_logBBstart;   /* start block of log */
 	int			l_logsize;      /* size of log in bytes */