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[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>
This commit is contained in:
Eric W. Biederman 2006-06-26 00:25:51 -07:00 committed by Linus Torvalds
parent 454cc105ef
commit de7587343b
1 changed files with 4 additions and 4 deletions
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8
fs/proc/base.c
View File

@ -1940,11 +1940,11 @@ struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct
if (tgid == ~0U)
goto out;
read_lock(&tasklist_lock);
rcu_read_lock();
task = find_task_by_pid(tgid);
if (task)
get_task_struct(task);
read_unlock(&tasklist_lock);
rcu_read_unlock();
if (!task)
goto out;
@ -1988,11 +1988,11 @@ static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry
if (tid == ~0U)
goto out;
read_lock(&tasklist_lock);
rcu_read_lock();
task = find_task_by_pid(tid);
if (task)
get_task_struct(task);
read_unlock(&tasklist_lock);
rcu_read_unlock();
if (!task)
goto out;
if (leader->tgid != task->tgid)