[PATCH] Don't use UnSet with consistency_policy

[Artur Paszkiewicz <artur.paszkiewicz@intel.com>]

Use CONSISTENCY_POLICY_UNKNOWN instead. Simplify some checks because
since 5e8e35fb7e17 ("maps: Use keyvalue for null terminator to indicate
'unset' value") map_name() can return this default directly.

Suggested-by: Jes Sorensen <Jes.Sorensen@gmail.com>
Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
---
 maps.c        |  2 +-
 mdadm.c       | 12 ++++++------
 super-intel.c |  4 +---
 sysfs.c       | 10 ++++------
 4 files changed, 12 insertions(+), 16 deletions(-)

diff --git a/maps.c b/maps.c
index 11dd3d20..8fe0a6df 100644
--- a/maps.c
+++ b/maps.c
@@ -137,7 +137,7 @@ mapping_t consistency_policies[] = {
 	{ "bitmap", CONSISTENCY_POLICY_BITMAP},
 	{ "journal", CONSISTENCY_POLICY_JOURNAL},
 	{ "ppl", CONSISTENCY_POLICY_PPL},
-	{ NULL, UnSet }
+	{ NULL, CONSISTENCY_POLICY_UNKNOWN }
 };
 
 mapping_t sysfs_array_states[] = {
diff --git a/mdadm.c b/mdadm.c
index 41dae1db..b689e328 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -78,7 +78,7 @@ int main(int argc, char *argv[])
 		.level		= UnSet,
 		.layout		= UnSet,
 		.bitmap_chunk	= UnSet,
-		.consistency_policy	= UnSet,
+		.consistency_policy	= CONSISTENCY_POLICY_UNKNOWN,
 	};
 
 	char sys_hostname[256];
@@ -1228,8 +1228,7 @@ int main(int argc, char *argv[])
 		case O(GROW, 'k'):
 			s.consistency_policy = map_name(consistency_policies,
 							optarg);
-			if (s.consistency_policy == UnSet ||
-			    s.consistency_policy < CONSISTENCY_POLICY_RESYNC) {
+			if (s.consistency_policy < CONSISTENCY_POLICY_RESYNC) {
 				pr_err("Invalid consistency policy: %s\n",
 				       optarg);
 				exit(2);
@@ -1267,7 +1266,7 @@ int main(int argc, char *argv[])
 			pr_err("--write-journal is only supported for RAID level 4/5/6.\n");
 			exit(2);
 		}
-		if (s.consistency_policy != UnSet &&
+		if (s.consistency_policy != CONSISTENCY_POLICY_UNKNOWN &&
 		    s.consistency_policy != CONSISTENCY_POLICY_JOURNAL) {
 			pr_err("--write-journal is not supported with consistency policy: %s\n",
 			       map_num(consistency_policies, s.consistency_policy));
@@ -1275,7 +1274,8 @@ int main(int argc, char *argv[])
 		}
 	}
 
-	if (mode == CREATE && s.consistency_policy != UnSet) {
+	if (mode == CREATE &&
+	    s.consistency_policy != CONSISTENCY_POLICY_UNKNOWN) {
 		if (s.level <= 0) {
 			pr_err("--consistency-policy not meaningful with level %s.\n",
 			       map_num(pers, s.level));
@@ -1687,7 +1687,7 @@ int main(int argc, char *argv[])
 			rv = Grow_reshape(devlist->devname, mdfd,
 					  devlist->next,
 					  data_offset, &c, &s);
-		} else if (s.consistency_policy != UnSet) {
+		} else if (s.consistency_policy != CONSISTENCY_POLICY_UNKNOWN) {
 			rv = Grow_consistency_policy(devlist->devname, mdfd, &c, &s);
 		} else if (array_size == 0)
 			pr_err("no changes to --grow\n");
diff --git a/super-intel.c b/super-intel.c
index 0aed57c8..fbff215c 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -5369,9 +5369,7 @@ static int init_super_imsm_volume(struct supertype *st, mdu_array_info_t *info,
 	}
 	mpb->num_raid_devs++;
 
-	if (s->consistency_policy == UnSet ||
-	    s->consistency_policy == CONSISTENCY_POLICY_RESYNC ||
-	    s->consistency_policy == CONSISTENCY_POLICY_NONE) {
+	if (s->consistency_policy <= CONSISTENCY_POLICY_RESYNC) {
 		dev->rwh_policy = RWH_OFF;
 	} else if (s->consistency_policy == CONSISTENCY_POLICY_PPL) {
 		dev->rwh_policy = RWH_DISTRIBUTED;
diff --git a/sysfs.c b/sysfs.c
index 712f8b3e..aa30de5c 100644
--- a/sysfs.c
+++ b/sysfs.c
@@ -254,13 +254,11 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 
 	if (options & GET_CONSISTENCY_POLICY) {
 		strcpy(base, "consistency_policy");
-		if (load_sys(fname, buf, sizeof(buf))) {
+		if (load_sys(fname, buf, sizeof(buf)))
 			sra->consistency_policy = CONSISTENCY_POLICY_UNKNOWN;
-		} else {
-			sra->consistency_policy = map_name(consistency_policies, buf);
-			if (sra->consistency_policy == UnSet)
-				sra->consistency_policy = CONSISTENCY_POLICY_UNKNOWN;
-		}
+		else
+			sra->consistency_policy = map_name(consistency_policies,
+							   buf);
 	}
 
 	if (! (options & GET_DEVS))
-- 
2.11.0