Re: [PATCH 5/5] ptrace: Revert "Prepare to fix racy accesses on taskbreakpoints"
From: Frederic Weisbecker
Date: Mon Apr 15 2013 - 18:59:35 EST
On Sun, Apr 14, 2013 at 06:05:41PM +0200, Oleg Nesterov wrote:
> This reverts commit bf26c018490c2fce7fe9b629083b96ce0e6ad019.
> The patch was fine but we can no longer race with SIGKILL after
> 9899d11f "ptrace: ensure arch_ptrace/ptrace_request can never race
> with SIGKILL", the __TASK_TRACED tracee can't be woken up and
> ->ptrace_bps can't go away.
> Now that ptrace_get_breakpoints/ptrace_put_breakpoints have no
> callers, we can kill them and remove task->ptrace_bp_refcnt.
> Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Acked-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Thanks a lot!
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