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ovl_lookup_real_one(): don't bother with strlen()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2019-04-26 13:07:27 -04:00
parent 1d8b29fdb7
commit 230c6402b1
7 changed files with 13 additions and 15 deletions
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14
fs/dcache.c
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@@ -284,25 +284,23 @@ static inline int dname_external(const struct dentry *dentry)
void take_dentry_name_snapshot(struct name_snapshot *name, struct dentry *dentry)
{
spin_lock(&dentry->d_lock);
name->name = dentry->d_name;
if (unlikely(dname_external(dentry))) {
struct external_name *p = external_name(dentry);
atomic_inc(&p->u.count);
spin_unlock(&dentry->d_lock);
name->name = p->name;
atomic_inc(&external_name(dentry)->u.count);
} else {
memcpy(name->inline_name, dentry->d_iname,
dentry->d_name.len + 1);
spin_unlock(&dentry->d_lock);
name->name = name->inline_name;
name->name.name = name->inline_name;
}
spin_unlock(&dentry->d_lock);
}
EXPORT_SYMBOL(take_dentry_name_snapshot);
void release_dentry_name_snapshot(struct name_snapshot *name)
{
if (unlikely(name->name != name->inline_name)) {
if (unlikely(name->name.name != name->inline_name)) {
struct external_name *p;
p = container_of(name->name, struct external_name, name[0]);
p = container_of(name->name.name, struct external_name, name[0]);
if (unlikely(atomic_dec_and_test(&p->u.count)))
kfree_rcu(p, u.head);
}