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shrink_dentry_list(): no need to check that dentry refcount is marked dead 

... we won't see DCACHE_MAY_FREE on anything that is *not* dead
and checking d_flags is just as cheap as checking refcount.

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2023-10-30 13:57:12 -04:00
parent 3fcf535626
commit cd9f84f35c
1 changed files with 2 additions and 3 deletions
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5
fs/dcache.c
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@ -1191,11 +1191,10 @@ void shrink_dentry_list(struct list_head *list)
spin_lock(&dentry->d_lock);
rcu_read_lock();
if (!shrink_lock_dentry(dentry)) {
bool can_free = false;
bool can_free;
rcu_read_unlock();
d_shrink_del(dentry);
if (dentry->d_lockref.count < 0)
can_free = dentry->d_flags & DCACHE_MAY_FREE;
can_free = dentry->d_flags & DCACHE_MAY_FREE;
spin_unlock(&dentry->d_lock);
if (can_free)
dentry_free(dentry);