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31552385f8
Add the static and runtime initializer mechanics to support the RT variant of local_lock, which requires the lock type in the lockdep map to be set to LD_LOCK_PERCPU. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20210815211305.967526724@linutronix.de
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
#ifndef __LINUX_SPINLOCK_TYPES_H
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#define __LINUX_SPINLOCK_TYPES_H
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/*
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* include/linux/spinlock_types.h - generic spinlock type definitions
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* and initializers
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*
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* portions Copyright 2005, Red Hat, Inc., Ingo Molnar
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* Released under the General Public License (GPL).
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*/
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#include <linux/spinlock_types_raw.h>
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#ifndef CONFIG_PREEMPT_RT
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/* Non PREEMPT_RT kernels map spinlock to raw_spinlock */
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typedef struct spinlock {
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union {
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struct raw_spinlock rlock;
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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# define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map))
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struct {
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u8 __padding[LOCK_PADSIZE];
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struct lockdep_map dep_map;
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};
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#endif
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};
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} spinlock_t;
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#define ___SPIN_LOCK_INITIALIZER(lockname) \
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{ \
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.raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \
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SPIN_DEBUG_INIT(lockname) \
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SPIN_DEP_MAP_INIT(lockname) }
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#define __SPIN_LOCK_INITIALIZER(lockname) \
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{ { .rlock = ___SPIN_LOCK_INITIALIZER(lockname) } }
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#define __SPIN_LOCK_UNLOCKED(lockname) \
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(spinlock_t) __SPIN_LOCK_INITIALIZER(lockname)
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#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
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#else /* !CONFIG_PREEMPT_RT */
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/* PREEMPT_RT kernels map spinlock to rt_mutex */
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#include <linux/rtmutex.h>
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typedef struct spinlock {
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struct rt_mutex_base lock;
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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struct lockdep_map dep_map;
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#endif
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} spinlock_t;
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#define __SPIN_LOCK_UNLOCKED(name) \
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{ \
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.lock = __RT_MUTEX_BASE_INITIALIZER(name.lock), \
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SPIN_DEP_MAP_INIT(name) \
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}
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#define __LOCAL_SPIN_LOCK_UNLOCKED(name) \
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{ \
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.lock = __RT_MUTEX_BASE_INITIALIZER(name.lock), \
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LOCAL_SPIN_DEP_MAP_INIT(name) \
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}
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#define DEFINE_SPINLOCK(name) \
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spinlock_t name = __SPIN_LOCK_UNLOCKED(name)
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#endif /* CONFIG_PREEMPT_RT */
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#include <linux/rwlock_types.h>
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#endif /* __LINUX_SPINLOCK_TYPES_H */
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