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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 26 Jun 2019 17:44:13 +0200
Subject: [PATCH 271/342] Revert "futex: Ensure lock/unlock symetry versus
pi_lock and hash bucket lock"
Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=d00bb8bbc139fe4cd03a34a820bc7ed395b791ea
[ Upstream commit 6a773b70cf105b46298ed3b44e77c102ce31d9ec ]
Drop the RT fixup, the futex code will be changed to avoid the need for
the workaround.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/futex.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/kernel/futex.c b/kernel/futex.c
index a5a263a3efbf..3449a716a378 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -962,9 +962,7 @@ static void exit_pi_state_list(struct task_struct *curr)
if (head->next != next) {
/* retain curr->pi_lock for the loop invariant */
raw_spin_unlock(&pi_state->pi_mutex.wait_lock);
- raw_spin_unlock_irq(&curr->pi_lock);
spin_unlock(&hb->lock);
- raw_spin_lock_irq(&curr->pi_lock);
put_pi_state(pi_state);
continue;
}
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