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ipc/util.c: use __seq_open_private() instead of seq_open()

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Using __seq_open_private() removes boilerplate code from
sysvipc_proc_open().

The resultant code is shorter and easier to follow.

However, please note that __seq_open_private() call kzalloc() rather than
kmalloc() which may affect timing due to the memory initialisation
overhead.

Signed-off-by: Rob Jones <rob.jones@codethink.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rob Jones 2014-10-13 15:54:14 -07:00 committed by Linus Torvalds
parent bf77b94c99
commit d66a0520cb
1 changed files with 4 additions and 16 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

20
ipc/util.c
View file

@ -892,28 +892,16 @@ static const struct seq_operations sysvipc_proc_seqops = {
static int sysvipc_proc_open(struct inode *inode, struct file *file)
{
int ret;
struct seq_file *seq;
struct ipc_proc_iter *iter;
ret = -ENOMEM;
iter = kmalloc(sizeof(*iter), GFP_KERNEL);
iter = __seq_open_private(file, &sysvipc_proc_seqops, sizeof(*iter));
if (!iter)
goto out;
ret = seq_open(file, &sysvipc_proc_seqops);
if (ret) {
kfree(iter);
goto out;
}
seq = file->private_data;
seq->private = iter;
return -ENOMEM;
iter->iface = PDE_DATA(inode);
iter->ns = get_ipc_ns(current->nsproxy->ipc_ns);
out:
return ret;
return 0;
}
static int sysvipc_proc_release(struct inode *inode, struct file *file)