linux-kernel - [tip: locking/core] locking/rtmutex: Convert macros to inlines

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Date:   Tue, 17 Aug 2021 20:14:31 -0000
From:   "tip-bot2 for Sebastian Andrzej Siewior" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: locking/core] locking/rtmutex: Convert macros to inlines

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     785159301bedea25fae9b20cae3d12377246e941
Gitweb:        https://git.kernel.org/tip/785159301bedea25fae9b20cae3d12377246e941
Author:        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
AuthorDate:    Sun, 15 Aug 2021 23:27:54 +02:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 17 Aug 2021 17:00:48 +02:00

locking/rtmutex: Convert macros to inlines

Inlines are type-safe...

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Link: https://lore.kernel.org/r/20210815211302.610830960@linutronix.de
---
 kernel/locking/rtmutex.c | 31 +++++++++++++++++++++++++++----
 1 file changed, 27 insertions(+), 4 deletions(-)

diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index 1a7e3f8..5187add 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -141,8 +141,19 @@ static __always_inline void fixup_rt_mutex_waiters(struct rt_mutex *lock)
  * set up.
  */
 #ifndef CONFIG_DEBUG_RT_MUTEXES
-# define rt_mutex_cmpxchg_acquire(l,c,n) (cmpxchg_acquire(&l->owner, c, n) == c)
-# define rt_mutex_cmpxchg_release(l,c,n) (cmpxchg_release(&l->owner, c, n) == c)
+static __always_inline bool rt_mutex_cmpxchg_acquire(struct rt_mutex *lock,
+						     struct task_struct *old,
+						     struct task_struct *new)
+{
+	return cmpxchg_acquire(&lock->owner, old, new) == old;
+}
+
+static __always_inline bool rt_mutex_cmpxchg_release(struct rt_mutex *lock,
+						     struct task_struct *old,
+						     struct task_struct *new)
+{
+	return cmpxchg_release(&lock->owner, old, new) == old;
+}
 
 /*
  * Callers must hold the ->wait_lock -- which is the whole purpose as we force
@@ -201,8 +212,20 @@ static __always_inline bool unlock_rt_mutex_safe(struct rt_mutex *lock,
 }
 
 #else
-# define rt_mutex_cmpxchg_acquire(l,c,n)	(0)
-# define rt_mutex_cmpxchg_release(l,c,n)	(0)
+static __always_inline bool rt_mutex_cmpxchg_acquire(struct rt_mutex *lock,
+						     struct task_struct *old,
+						     struct task_struct *new)
+{
+	return false;
+
+}
+
+static __always_inline bool rt_mutex_cmpxchg_release(struct rt_mutex *lock,
+						     struct task_struct *old,
+						     struct task_struct *new)
+{
+	return false;
+}
 
 static __always_inline void mark_rt_mutex_waiters(struct rt_mutex *lock)
 {