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btrfs: send: use temporary variable to store allocation size 

We're going to use the argument multiple times later.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2016-04-11 18:52:02 +02:00
parent eb5b75fe2e
commit e55d1153db
1 changed files with 8 additions and 6 deletions
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14
fs/btrfs/send.c
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@ -5939,6 +5939,7 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
u32 i;
u64 *clone_sources_tmp = NULL;
int clone_sources_to_rollback = 0;
unsigned alloc_size;
int sort_clone_roots = 0;
int index;
@ -6050,24 +6051,25 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
sctx->waiting_dir_moves = RB_ROOT;
sctx->orphan_dirs = RB_ROOT;
sctx->clone_roots = vzalloc(sizeof(struct clone_root) *
(arg->clone_sources_count + 1));
alloc_size = sizeof(struct clone_root) * (arg->clone_sources_count + 1);
sctx->clone_roots = vzalloc(alloc_size);
if (!sctx->clone_roots) {
ret = -ENOMEM;
goto out;
}
alloc_size = arg->clone_sources_count * sizeof(*arg->clone_sources);
if (arg->clone_sources_count) {
clone_sources_tmp = vmalloc(arg->clone_sources_count *
sizeof(*arg->clone_sources));
clone_sources_tmp = vmalloc(alloc_size);
if (!clone_sources_tmp) {
ret = -ENOMEM;
goto out;
}
ret = copy_from_user(clone_sources_tmp, arg->clone_sources,
arg->clone_sources_count *
sizeof(*arg->clone_sources));
alloc_size);
if (ret) {
ret = -EFAULT;
goto out;