[GFS2] Remove max_atomic_write tunable

This removes an unused sysfs tunable parameter.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/incore.h

@@ -417,7 +417,6 @@ struct gfs2_tune {
 	unsigned int gt_atime_quantum; /* Min secs between atime updates */
 	unsigned int gt_new_files_jdata;
 	unsigned int gt_new_files_directio;
-	unsigned int gt_max_atomic_write; /* Split big writes into this size */
 	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 	unsigned int gt_lockdump_size;
 	unsigned int gt_stall_secs; /* Detects trouble! */

fs/gfs2/super.c

@@ -71,7 +71,6 @@ void gfs2_tune_init(struct gfs2_tune *gt)
 	gt->gt_atime_quantum = 3600;
 	gt->gt_new_files_jdata = 0;
 	gt->gt_new_files_directio = 0;
-	gt->gt_max_atomic_write = 4 << 20;
 	gt->gt_max_readahead = 1 << 18;
 	gt->gt_lockdump_size = 131072;
 	gt->gt_stall_secs = 600;

fs/gfs2/sys.c

@@ -441,7 +441,6 @@ TUNE_ATTR(new_files_jdata, 0);
 TUNE_ATTR(new_files_directio, 0);
 TUNE_ATTR(quota_simul_sync, 1);
 TUNE_ATTR(quota_cache_secs, 1);
-TUNE_ATTR(max_atomic_write, 1);
 TUNE_ATTR(stall_secs, 1);
 TUNE_ATTR(greedy_default, 1);
 TUNE_ATTR(greedy_quantum, 1);
@@ -467,7 +466,6 @@ static struct attribute *tune_attrs[] = {
 	&tune_attr_statfs_slow.attr,
 	&tune_attr_quota_simul_sync.attr,
 	&tune_attr_quota_cache_secs.attr,
-	&tune_attr_max_atomic_write.attr,
 	&tune_attr_stall_secs.attr,
 	&tune_attr_greedy_default.attr,
 	&tune_attr_greedy_quantum.attr,