btrfs-progs: use calloc instead of malloc+memset for tree roots

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/disk-io.c b/disk-io.c
index 1d48893..8496ade 100644 (file)
--- a/disk-io.c
+++ b/disk-io.c
@@ -833,13 +833,13 @@ struct btrfs_fs_info *btrfs_new_fs_info(int writable, u64 sb_bytenr)
 
        memset(fs_info, 0, sizeof(struct btrfs_fs_info));
 
-       fs_info->tree_root = malloc(sizeof(struct btrfs_root));
-       fs_info->extent_root = malloc(sizeof(struct btrfs_root));
-       fs_info->chunk_root = malloc(sizeof(struct btrfs_root));
-       fs_info->dev_root = malloc(sizeof(struct btrfs_root));
-       fs_info->csum_root = malloc(sizeof(struct btrfs_root));
-       fs_info->quota_root = malloc(sizeof(struct btrfs_root));
-       fs_info->super_copy = malloc(BTRFS_SUPER_INFO_SIZE);
+       fs_info->tree_root = calloc(1, sizeof(struct btrfs_root));
+       fs_info->extent_root = calloc(1, sizeof(struct btrfs_root));
+       fs_info->chunk_root = calloc(1, sizeof(struct btrfs_root));
+       fs_info->dev_root = calloc(1, sizeof(struct btrfs_root));
+       fs_info->csum_root = calloc(1, sizeof(struct btrfs_root));
+       fs_info->quota_root = calloc(1, sizeof(struct btrfs_root));
+       fs_info->super_copy = calloc(1, BTRFS_SUPER_INFO_SIZE);
 
        if (!fs_info->tree_root || !fs_info->extent_root ||
            !fs_info->chunk_root || !fs_info->dev_root ||
@@ -847,14 +847,6 @@ struct btrfs_fs_info *btrfs_new_fs_info(int writable, u64 sb_bytenr)
            !fs_info->super_copy)
                goto free_all;
 
-       memset(fs_info->super_copy, 0, BTRFS_SUPER_INFO_SIZE);
-       memset(fs_info->tree_root, 0, sizeof(struct btrfs_root));
-       memset(fs_info->extent_root, 0, sizeof(struct btrfs_root));
-       memset(fs_info->chunk_root, 0, sizeof(struct btrfs_root));
-       memset(fs_info->dev_root, 0, sizeof(struct btrfs_root));
-       memset(fs_info->csum_root, 0, sizeof(struct btrfs_root));
-       memset(fs_info->quota_root, 0, sizeof(struct btrfs_root));
-
        extent_io_tree_init(&fs_info->extent_cache);
        extent_io_tree_init(&fs_info->free_space_cache);
        extent_io_tree_init(&fs_info->block_group_cache);