[PATCH v2 0/4] proc: first_tid() fix/cleanup
From: Oleg Nesterov
Date: Mon Jun 03 2013 - 15:10:38 EST
next_thread() should be avoided, probably next_tid() is the
only "valid" user.
But now we have another reason to avoid (and probably even kill)
it, we are going to replace or fix while_each_thread(), almost
every lockless usage is wrong.
1/4: Update the changelog, do not move the comment.
2/4: No changes.
3/4: Update the comment following the explanations from
Eric pointed that get_proc_task() without rcu lock
can trigger the (bogus) warning. Extract the similar
check from pid_delete_dentry() into the new helper
and use it instead.
I didn't dare to preserve his ack, but the only change
is the new proc_inode_is_dead() helper and
- if (pid_task(proc_pid(inode))
+ if (proc_inode_is_dead(inode))
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