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btrfs: Replace kmalloc with kmalloc_array

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Replace kmalloc(size * nr, ) with kmalloc_array(nr, size), thus making
it easier to check is that the calculation doesn't wrap or return a smaller allocation

Signed-off-by: Dulshani Gunawardhana <dulshani.gunawardhana89@gmail.com>
Reviewed-by: Zach Brown <zab@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Dulshani Gunawardhana 2013-10-31 10:32:18 +05:30 committed by Chris Mason
parent e248e04e77
commit d9b0d9ba04
4 changed files with 5 additions and 5 deletions
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4
fs/btrfs/delayed-inode.c
View File

@ -770,13 +770,13 @@ static int btrfs_batch_insert_items(struct btrfs_root *root,
*/
btrfs_set_path_blocking(path);
keys = kmalloc(sizeof(struct btrfs_key) * nitems, GFP_NOFS);
keys = kmalloc_array(nitems, sizeof(struct btrfs_key), GFP_NOFS);
if (!keys) {
ret = -ENOMEM;
goto out;
}
data_size = kmalloc(sizeof(u32) * nitems, GFP_NOFS);
data_size = kmalloc_array(nitems, sizeof(u32), GFP_NOFS);
if (!data_size) {
ret = -ENOMEM;
goto error;

2
fs/btrfs/ioctl.c
View File

@ -1198,7 +1198,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
ra = &file->f_ra;
}
pages = kmalloc(sizeof(struct page *) * max_cluster,
pages = kmalloc_array(max_cluster, sizeof(struct page *),
GFP_NOFS);
if (!pages) {
ret = -ENOMEM;

2
fs/btrfs/super.c
View File

@ -1470,7 +1470,7 @@ static int btrfs_calc_avail_data_space(struct btrfs_root *root, u64 *free_bytes)
nr_devices = fs_info->fs_devices->open_devices;
BUG_ON(!nr_devices);
devices_info = kmalloc(sizeof(*devices_info) * nr_devices,
devices_info = kmalloc_array(nr_devices, sizeof(*devices_info),
GFP_NOFS);
if (!devices_info)
return -ENOMEM;

2
fs/btrfs/volumes.c
View File

@ -4901,7 +4901,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
num_stripes = map->num_stripes;
max_errors = nr_parity_stripes(map);
raid_map = kmalloc(sizeof(u64) * num_stripes,
raid_map = kmalloc_array(num_stripes, sizeof(u64),
GFP_NOFS);
if (!raid_map) {
ret = -ENOMEM;