c6eb3dda25
Since we now have p->on_cpu unconditionally available, use it to re-implement mutex_spin_on_owner. Requested-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Frank Rowand <frank.rowand@am.sony.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20110405152728.826338173@chello.nl
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/*
|
|
* Mutexes: blocking mutual exclusion locks
|
|
*
|
|
* started by Ingo Molnar:
|
|
*
|
|
* Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
|
|
*
|
|
* This file contains mutex debugging related internal prototypes, for the
|
|
* !CONFIG_DEBUG_MUTEXES case. Most of them are NOPs:
|
|
*/
|
|
|
|
#define spin_lock_mutex(lock, flags) \
|
|
do { spin_lock(lock); (void)(flags); } while (0)
|
|
#define spin_unlock_mutex(lock, flags) \
|
|
do { spin_unlock(lock); (void)(flags); } while (0)
|
|
#define mutex_remove_waiter(lock, waiter, ti) \
|
|
__list_del((waiter)->list.prev, (waiter)->list.next)
|
|
|
|
#ifdef CONFIG_SMP
|
|
static inline void mutex_set_owner(struct mutex *lock)
|
|
{
|
|
lock->owner = current;
|
|
}
|
|
|
|
static inline void mutex_clear_owner(struct mutex *lock)
|
|
{
|
|
lock->owner = NULL;
|
|
}
|
|
#else
|
|
static inline void mutex_set_owner(struct mutex *lock)
|
|
{
|
|
}
|
|
|
|
static inline void mutex_clear_owner(struct mutex *lock)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#define debug_mutex_wake_waiter(lock, waiter) do { } while (0)
|
|
#define debug_mutex_free_waiter(waiter) do { } while (0)
|
|
#define debug_mutex_add_waiter(lock, waiter, ti) do { } while (0)
|
|
#define debug_mutex_unlock(lock) do { } while (0)
|
|
#define debug_mutex_init(lock, name, key) do { } while (0)
|
|
|
|
static inline void
|
|
debug_mutex_lock_common(struct mutex *lock, struct mutex_waiter *waiter)
|
|
{
|
|
}
|