[PATCH] proc: Remove tasklist_lock from proc_pid_lookup() and proc_task_lookup()
Since we no longer need the tasklist_lock for get_task_struct the lookup methods no longer need the tasklist_lock. This just depends on my previous patch that makes get_task_struct() rcu safe. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -1940,11 +1940,11 @@ struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct
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if (tgid == ~0U)
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goto out;
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read_lock(&tasklist_lock);
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rcu_read_lock();
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task = find_task_by_pid(tgid);
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if (task)
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get_task_struct(task);
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read_unlock(&tasklist_lock);
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rcu_read_unlock();
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if (!task)
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goto out;
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@ -1988,11 +1988,11 @@ static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry
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if (tid == ~0U)
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goto out;
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read_lock(&tasklist_lock);
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rcu_read_lock();
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task = find_task_by_pid(tid);
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if (task)
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get_task_struct(task);
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read_unlock(&tasklist_lock);
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rcu_read_unlock();
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if (!task)
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goto out;
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if (leader->tgid != task->tgid)
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