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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>
This commit is contained in:
Mike Snitzer 2012-07-27 15:07:57 +01:00 committed by Alasdair G Kergon
parent 7768ed33cc
commit 17b7d63f7e
3 changed files with 3 additions and 3 deletions
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2
drivers/md/dm-thin-metadata.c
View File

@ -1262,7 +1262,7 @@ dm_thin_id dm_thin_dev_id(struct dm_thin_device *td)
return td->id; 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; return td->snapshotted_time > time;
} }

2
drivers/md/dm-thin-metadata.h
View File

@ -119,7 +119,7 @@ dm_thin_id dm_thin_dev_id(struct dm_thin_device *td);
struct dm_thin_lookup_result { struct dm_thin_lookup_result {
dm_block_t block; dm_block_t block;
int shared; unsigned shared:1;
}; };
/* /*

2
drivers/md/dm-thin.c
View File

@ -1218,7 +1218,7 @@ static void process_discard(struct thin_c *tc, struct bio *bio)
*/ */
m = get_next_mapping(pool); m = get_next_mapping(pool);
m->tc = tc; 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->virt_block = block;
m->data_block = lookup_result.block; m->data_block = lookup_result.block;
m->cell = cell; m->cell = cell;