dm: use vzalloc

Use vzalloc() instead of vmalloc()+memset().

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

3 files changed, 3 insertions, 7 deletions

diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index 306ce123d6b4..3b52bb72bd1f 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -492,7 +492,7 @@ static int create_log_context(struct dm_dirty_log *log, struct dm_target *ti,
         memset(lc->sync_bits, (sync == NOSYNC) ? -1 : 0, bitset_size);
         lc->sync_count = (sync == NOSYNC) ? region_count : 0;
 
-        lc->recovering_bits = vmalloc(bitset_size);
+        lc->recovering_bits = vzalloc(bitset_size);
         if (!lc->recovering_bits) {
                 DMWARN("couldn't allocate sync bitset");
                 vfree(lc->sync_bits);
@@ -504,7 +504,6 @@ static int create_log_context(struct dm_dirty_log *log, struct dm_target *ti,
                 kfree(lc);
                 return -ENOMEM;
         }
-        memset(lc->recovering_bits, 0, bitset_size);
         lc->sync_search = 0;
         log->context = lc;
 
diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index 39becbec4dfe..1a0acb8abdf6 100644
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -174,10 +174,9 @@ static int alloc_area(struct pstore *ps)
         if (!ps->area)
                 goto err_area;
 
-        ps->zero_area = vmalloc(len);
+        ps->zero_area = vzalloc(len);
         if (!ps->zero_area)
                 goto err_zero_area;
-        memset(ps->zero_area, 0, len);
 
         ps->header_area = vmalloc(len);
         if (!ps->header_area)
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 3909fa259f55..8dc67555e736 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -153,9 +153,7 @@ void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size)
                 return NULL;
 
         size = nmemb * elem_size;
-        addr = vmalloc(size);
-        if (addr)
-                memset(addr, 0, size);
+        addr = vzalloc(size);
 
         return addr;
 }