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dput(): consolidate the "do we need to retain it?" into an inlined helper 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2018-02-23 21:07:24 -05:00
parent 8b987a46a1
commit a338579f2f
1 changed files with 23 additions and 19 deletions
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42
fs/dcache.c
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@ -626,6 +626,24 @@ static inline struct dentry *lock_parent(struct dentry *dentry)
return __lock_parent(dentry);
}
static inline bool retain_dentry(struct dentry *dentry)
{
WARN_ON(d_in_lookup(dentry));
/* Unreachable? Get rid of it */
if (unlikely(d_unhashed(dentry)))
return false;
if (unlikely(dentry->d_flags & DCACHE_DISCONNECTED))
return false;
if (unlikely(dentry->d_flags & DCACHE_OP_DELETE)) {
if (dentry->d_op->d_delete(dentry))
return false;
}
return true;
}
/*
* Finish off a dentry we've decided to kill.
* dentry->d_lock must be held, returns with it unlocked.
@ -804,27 +822,13 @@ repeat:
/* Slow case: now with the dentry lock held */
rcu_read_unlock();
WARN_ON(d_in_lookup(dentry));
/* Unreachable? Get rid of it */
if (unlikely(d_unhashed(dentry)))
goto kill_it;
if (unlikely(dentry->d_flags & DCACHE_DISCONNECTED))
goto kill_it;
if (unlikely(dentry->d_flags & DCACHE_OP_DELETE)) {
if (dentry->d_op->d_delete(dentry))
goto kill_it;
if (likely(retain_dentry(dentry))) {
dentry_lru_add(dentry);
dentry->d_lockref.count--;
spin_unlock(&dentry->d_lock);
return;
}
dentry_lru_add(dentry);
dentry->d_lockref.count--;
spin_unlock(&dentry->d_lock);
return;
kill_it:
dentry = dentry_kill(dentry);
if (dentry) {
cond_resched();