dm thin: clean up compiler warning

Clean up "warning: dubious: !x & y".  Also make it clear that
__snapshotted_since() returns a bool and that dm_thin_lookup_result's
'shared' member is a flag.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

3 files changed, 3 insertions, 3 deletions

diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index 3e2907f0bc46..c858931d2dcb 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -1262,7 +1262,7 @@ dm_thin_id dm_thin_dev_id(struct dm_thin_device *td)
         return td->id;
 }
 
-static int __snapshotted_since(struct dm_thin_device *td, uint32_t time)
+static bool __snapshotted_since(struct dm_thin_device *td, uint32_t time)
 {
         return td->snapshotted_time > time;
 }
diff --git a/drivers/md/dm-thin-metadata.h b/drivers/md/dm-thin-metadata.h
index b88918ccdaf6..7b47c0a9a8e3 100644
--- a/drivers/md/dm-thin-metadata.h
+++ b/drivers/md/dm-thin-metadata.h
@@ -119,7 +119,7 @@ dm_thin_id dm_thin_dev_id(struct dm_thin_device *td);
 
 struct dm_thin_lookup_result {
         dm_block_t block;
-        int shared;
+        unsigned shared:1;
 };
 
 /*
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 18f87b0def12..0bb9e646e215 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -1218,7 +1218,7 @@ static void process_discard(struct thin_c *tc, struct bio *bio)
                          */
                         m = get_next_mapping(pool);
                         m->tc = tc;
-                        m->pass_discard = (!lookup_result.shared) & pool->pf.discard_passdown;
+                        m->pass_discard = (!lookup_result.shared) && pool->pf.discard_passdown;
                         m->virt_block = block;
                         m->data_block = lookup_result.block;
                         m->cell = cell;