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Revert "proc: io_accounting: Use new infrastructure to fix deadlocks in execve"

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This reverts commit ba7eb0e48e which is
commit 6914303824bb572278568330d72fc1f8f9814e67 upstream.

It breaks the API and we don't need it right now in the 5.4 tree.

Bug: 161946584
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I365679079428ea686ebd4879a2200f7de7142bae
This commit is contained in:
Greg Kroah-Hartman 2020-10-01 20:25:35 +02:00
commit 9003db7756
1 changed files with 2 additions and 2 deletions
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4
fs/proc/base.c
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@ -2770,7 +2770,7 @@ static int do_io_accounting(struct task_struct *task, struct seq_file *m, int wh
unsigned long flags;
int result;
result = mutex_lock_killable(&task->signal->exec_update_mutex);
result = mutex_lock_killable(&task->signal->cred_guard_mutex);
if (result)
return result;
@ -2806,7 +2806,7 @@ static int do_io_accounting(struct task_struct *task, struct seq_file *m, int wh
result = 0;
out_unlock:
mutex_unlock(&task->signal->exec_update_mutex);
mutex_unlock(&task->signal->cred_guard_mutex);
return result;
}