xfs: xlog_write() no longer needs contwr state

The rework of xlog_write() no longer requires xlog_get_iclog_state()
to tell it about internal iclog space reservation state to direct it
on what to do. Remove this parameter.

$ size fs/xfs/xfs_log.o.*
   text	   data	    bss	    dec	    hex	filename
  26520	    560	      8	  27088	   69d0	fs/xfs/xfs_log.o.orig
  26384	    560	      8	  26952	   6948	fs/xfs/xfs_log.o.patched

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chandan Babu R <chandan.babu@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

fs/xfs/xfs_log.c

@@ -49,7 +49,6 @@ xlog_state_get_iclog_space(
 	int			len,
 	struct xlog_in_core	**iclog,
 	struct xlog_ticket	*ticket,
-	int			*continued_write,
 	int			*logoffsetp);
 STATIC void
 xlog_grant_push_ail(
@@ -2263,8 +2262,7 @@ xlog_write_get_more_iclog_space(
 	uint32_t		*log_offset,
 	uint32_t		len,
 	uint32_t		*record_cnt,
-	uint32_t		*data_cnt,
-	int			*contwr)
+	uint32_t		*data_cnt)
 {
 	struct xlog_in_core	*iclog = *iclogp;
 	struct xlog		*log = iclog->ic_log;
@@ -2278,8 +2276,8 @@ xlog_write_get_more_iclog_space(
 	if (error)
 		return error;
 
-	error = xlog_state_get_iclog_space(log, len, &iclog,
-				ticket, contwr, log_offset);
+	error = xlog_state_get_iclog_space(log, len, &iclog, ticket,
+					log_offset);
 	if (error)
 		return error;
 	*record_cnt = 0;
@@ -2302,8 +2300,7 @@ xlog_write_partial(
 	uint32_t		*log_offset,
 	uint32_t		*len,
 	uint32_t		*record_cnt,
-	uint32_t		*data_cnt,
-	int			*contwr)
+	uint32_t		*data_cnt)
 {
 	struct xlog_in_core	*iclog = *iclogp;
 	struct xlog_op_header	*ophdr;
@@ -2331,7 +2328,7 @@ xlog_write_partial(
 					sizeof(struct xlog_op_header)) {
 			error = xlog_write_get_more_iclog_space(ticket,
 					&iclog, log_offset, *len, record_cnt,
-					data_cnt, contwr);
+					data_cnt);
 			if (error)
 				return error;
 		}
@@ -2383,7 +2380,7 @@ xlog_write_partial(
 			error = xlog_write_get_more_iclog_space(ticket,
 					&iclog, log_offset,
 					*len + sizeof(struct xlog_op_header),
-					record_cnt, data_cnt, contwr);
+					record_cnt, data_cnt);
 			if (error)
 				return error;
 
@@ -2478,7 +2475,6 @@ xlog_write(
 {
 	struct xlog_in_core	*iclog = NULL;
 	struct xfs_log_vec	*lv = log_vector;
-	int			contwr = 0;
 	uint32_t		record_cnt = 0;
 	uint32_t		data_cnt = 0;
 	int			error = 0;
@@ -2492,7 +2488,7 @@ xlog_write(
 	}
 
 	error = xlog_state_get_iclog_space(log, len, &iclog, ticket,
-					   &contwr, &log_offset);
+					   &log_offset);
 	if (error)
 		return error;
 
@@ -2515,7 +2511,7 @@ xlog_write(
 		    lv->lv_bytes > iclog->ic_size - log_offset) {
 			error = xlog_write_partial(lv, ticket, &iclog,
 					&log_offset, &len, &record_cnt,
-					&data_cnt, &contwr);
+					&data_cnt);
 			if (error) {
 				/*
 				 * We have no iclog to release, so just return
@@ -2895,7 +2891,6 @@ xlog_state_get_iclog_space(
 	int			len,
 	struct xlog_in_core	**iclogp,
 	struct xlog_ticket	*ticket,
-	int			*continued_write,
 	int			*logoffsetp)
 {
 	int		  log_offset;
@@ -2973,13 +2968,10 @@ restart:
 	 * iclogs (to mark it taken), this particular iclog will release/sync
 	 * to disk in xlog_write().
 	 */
-	if (len <= iclog->ic_size - iclog->ic_offset) {
-		*continued_write = 0;
+	if (len <= iclog->ic_size - iclog->ic_offset)
 		iclog->ic_offset += len;
-	} else {
-		*continued_write = 1;
+	else
 		xlog_state_switch_iclogs(log, iclog, iclog->ic_size);
-	}
 	*iclogp = iclog;
 
 	ASSERT(iclog->ic_offset <= iclog->ic_size);