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Message-Id: <1541758065-10952-4-git-send-email-henrik@austad.us>
Date: Fri, 9 Nov 2018 11:07:31 +0100
From: Henrik Austad <henrik@...tad.us>
To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Henrik Austad <haustad@...co.com>,
Peter Zijlstra <peterz@...radead.org>, juri.lelli@....com,
bigeasy@...utronix.de, xlpang@...hat.com, rostedt@...dmis.org,
mathieu.desnoyers@...icios.com, jdesfossez@...icios.com,
dvhart@...radead.org, bristot@...hat.com,
Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 03/17] futex: Remove rt_mutex_deadlock_account_*()
From: Peter Zijlstra <peterz@...radead.org>
commit fffa954fb528963c2fb7b0c0084eb77e2be7ab52 upstream
These are unused and clutter up the code.
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: juri.lelli@....com
Cc: bigeasy@...utronix.de
Cc: xlpang@...hat.com
Cc: rostedt@...dmis.org
Cc: mathieu.desnoyers@...icios.com
Cc: jdesfossez@...icios.com
Cc: dvhart@...radead.org
Cc: bristot@...hat.com
Link: http://lkml.kernel.org/r/20170322104151.652692478@infradead.org
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Conflicts:
kernel/locking/rtmutex.c (WAKE_Q)
Tested-by: Henrik Austad <haustad@...co.com>
---
kernel/locking/rtmutex-debug.c | 9 --------
kernel/locking/rtmutex-debug.h | 3 ---
kernel/locking/rtmutex.c | 47 ++++++++++++++++--------------------------
kernel/locking/rtmutex.h | 2 --
4 files changed, 18 insertions(+), 43 deletions(-)
diff --git a/kernel/locking/rtmutex-debug.c b/kernel/locking/rtmutex-debug.c
index 62b6cee..0613c4b 100644
--- a/kernel/locking/rtmutex-debug.c
+++ b/kernel/locking/rtmutex-debug.c
@@ -173,12 +173,3 @@ void debug_rt_mutex_init(struct rt_mutex *lock, const char *name)
lock->name = name;
}
-void
-rt_mutex_deadlock_account_lock(struct rt_mutex *lock, struct task_struct *task)
-{
-}
-
-void rt_mutex_deadlock_account_unlock(struct task_struct *task)
-{
-}
-
diff --git a/kernel/locking/rtmutex-debug.h b/kernel/locking/rtmutex-debug.h
index d0519c3..b585af9 100644
--- a/kernel/locking/rtmutex-debug.h
+++ b/kernel/locking/rtmutex-debug.h
@@ -9,9 +9,6 @@
* This file contains macros used solely by rtmutex.c. Debug version.
*/
-extern void
-rt_mutex_deadlock_account_lock(struct rt_mutex *lock, struct task_struct *task);
-extern void rt_mutex_deadlock_account_unlock(struct task_struct *task);
extern void debug_rt_mutex_init_waiter(struct rt_mutex_waiter *waiter);
extern void debug_rt_mutex_free_waiter(struct rt_mutex_waiter *waiter);
extern void debug_rt_mutex_init(struct rt_mutex *lock, const char *name);
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index b066724d..6cf9dab7 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -937,8 +937,6 @@ takeit:
*/
rt_mutex_set_owner(lock, task);
- rt_mutex_deadlock_account_lock(lock, task);
-
return 1;
}
@@ -1331,8 +1329,6 @@ static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock,
debug_rt_mutex_unlock(lock);
- rt_mutex_deadlock_account_unlock(current);
-
/*
* We must be careful here if the fast path is enabled. If we
* have no waiters queued we cannot set owner to NULL here
@@ -1398,11 +1394,10 @@ rt_mutex_fastlock(struct rt_mutex *lock, int state,
struct hrtimer_sleeper *timeout,
enum rtmutex_chainwalk chwalk))
{
- if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current))) {
- rt_mutex_deadlock_account_lock(lock, current);
+ if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current)))
return 0;
- } else
- return slowfn(lock, state, NULL, RT_MUTEX_MIN_CHAINWALK);
+
+ return slowfn(lock, state, NULL, RT_MUTEX_MIN_CHAINWALK);
}
static inline int
@@ -1414,21 +1409,19 @@ rt_mutex_timed_fastlock(struct rt_mutex *lock, int state,
enum rtmutex_chainwalk chwalk))
{
if (chwalk == RT_MUTEX_MIN_CHAINWALK &&
- likely(rt_mutex_cmpxchg_acquire(lock, NULL, current))) {
- rt_mutex_deadlock_account_lock(lock, current);
+ likely(rt_mutex_cmpxchg_acquire(lock, NULL, current)))
return 0;
- } else
- return slowfn(lock, state, timeout, chwalk);
+
+ return slowfn(lock, state, timeout, chwalk);
}
static inline int
rt_mutex_fasttrylock(struct rt_mutex *lock,
int (*slowfn)(struct rt_mutex *lock))
{
- if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current))) {
- rt_mutex_deadlock_account_lock(lock, current);
+ if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current)))
return 1;
- }
+
return slowfn(lock);
}
@@ -1438,19 +1431,18 @@ rt_mutex_fastunlock(struct rt_mutex *lock,
struct wake_q_head *wqh))
{
WAKE_Q(wake_q);
+ bool deboost;
- if (likely(rt_mutex_cmpxchg_release(lock, current, NULL))) {
- rt_mutex_deadlock_account_unlock(current);
+ if (likely(rt_mutex_cmpxchg_release(lock, current, NULL)))
+ return;
- } else {
- bool deboost = slowfn(lock, &wake_q);
+ deboost = slowfn(lock, &wake_q);
- wake_up_q(&wake_q);
+ wake_up_q(&wake_q);
- /* Undo pi boosting if necessary: */
- if (deboost)
- rt_mutex_adjust_prio(current);
- }
+ /* Undo pi boosting if necessary: */
+ if (deboost)
+ rt_mutex_adjust_prio(current);
}
/**
@@ -1561,10 +1553,9 @@ EXPORT_SYMBOL_GPL(rt_mutex_unlock);
bool __sched rt_mutex_futex_unlock(struct rt_mutex *lock,
struct wake_q_head *wqh)
{
- if (likely(rt_mutex_cmpxchg_release(lock, current, NULL))) {
- rt_mutex_deadlock_account_unlock(current);
+ if (likely(rt_mutex_cmpxchg_release(lock, current, NULL)))
return false;
- }
+
return rt_mutex_slowunlock(lock, wqh);
}
@@ -1622,7 +1613,6 @@ void rt_mutex_init_proxy_locked(struct rt_mutex *lock,
__rt_mutex_init(lock, NULL);
debug_rt_mutex_proxy_lock(lock, proxy_owner);
rt_mutex_set_owner(lock, proxy_owner);
- rt_mutex_deadlock_account_lock(lock, proxy_owner);
}
/**
@@ -1638,7 +1628,6 @@ void rt_mutex_proxy_unlock(struct rt_mutex *lock,
{
debug_rt_mutex_proxy_unlock(lock);
rt_mutex_set_owner(lock, NULL);
- rt_mutex_deadlock_account_unlock(proxy_owner);
}
/**
diff --git a/kernel/locking/rtmutex.h b/kernel/locking/rtmutex.h
index c406058..6607802 100644
--- a/kernel/locking/rtmutex.h
+++ b/kernel/locking/rtmutex.h
@@ -11,8 +11,6 @@
*/
#define rt_mutex_deadlock_check(l) (0)
-#define rt_mutex_deadlock_account_lock(m, t) do { } while (0)
-#define rt_mutex_deadlock_account_unlock(l) do { } while (0)
#define debug_rt_mutex_init_waiter(w) do { } while (0)
#define debug_rt_mutex_free_waiter(w) do { } while (0)
#define debug_rt_mutex_lock(l) do { } while (0)
--
2.7.4
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