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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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e4d9191885
Locking init improvement: - introduce and use __SPIN_LOCK_UNLOCKED for array initializations, to pass in the name string of locks, used by debugging Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
70 lines
1.8 KiB
C
70 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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#if defined(CONFIG_SMP)
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# include <asm/spinlock_types.h>
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#else
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# include <linux/spinlock_types_up.h>
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#endif
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typedef struct {
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raw_spinlock_t raw_lock;
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#if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP)
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unsigned int break_lock;
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#endif
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#ifdef CONFIG_DEBUG_SPINLOCK
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unsigned int magic, owner_cpu;
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void *owner;
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#endif
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} spinlock_t;
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#define SPINLOCK_MAGIC 0xdead4ead
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typedef struct {
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raw_rwlock_t raw_lock;
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#if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP)
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unsigned int break_lock;
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#endif
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#ifdef CONFIG_DEBUG_SPINLOCK
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unsigned int magic, owner_cpu;
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void *owner;
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#endif
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} rwlock_t;
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#define RWLOCK_MAGIC 0xdeaf1eed
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#define SPINLOCK_OWNER_INIT ((void *)-1L)
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#ifdef CONFIG_DEBUG_SPINLOCK
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# define __SPIN_LOCK_UNLOCKED(lockname) \
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(spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
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.magic = SPINLOCK_MAGIC, \
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.owner = SPINLOCK_OWNER_INIT, \
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.owner_cpu = -1 }
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#define __RW_LOCK_UNLOCKED(lockname) \
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(rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
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.magic = RWLOCK_MAGIC, \
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.owner = SPINLOCK_OWNER_INIT, \
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.owner_cpu = -1 }
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#else
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# define __SPIN_LOCK_UNLOCKED(lockname) \
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(spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED }
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#define __RW_LOCK_UNLOCKED(lockname) \
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(rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED }
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#endif
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#define SPIN_LOCK_UNLOCKED __SPIN_LOCK_UNLOCKED(old_style_spin_init)
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#define RW_LOCK_UNLOCKED __RW_LOCK_UNLOCKED(old_style_rw_init)
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#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
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#define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x)
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#endif /* __LINUX_SPINLOCK_TYPES_H */
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