From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/blackfin/include/asm/spinlock.h | 105 ++++++++++++++++++++++++++++ 1 file changed, 105 insertions(+) create mode 100644 kernel/arch/blackfin/include/asm/spinlock.h (limited to 'kernel/arch/blackfin/include/asm/spinlock.h') diff --git a/kernel/arch/blackfin/include/asm/spinlock.h b/kernel/arch/blackfin/include/asm/spinlock.h new file mode 100644 index 000000000..490c7caa0 --- /dev/null +++ b/kernel/arch/blackfin/include/asm/spinlock.h @@ -0,0 +1,105 @@ +/* + * Copyright 2004-2009 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef __BFIN_SPINLOCK_H +#define __BFIN_SPINLOCK_H + +#ifndef CONFIG_SMP +# include +#else + +#include + +asmlinkage int __raw_spin_is_locked_asm(volatile int *ptr); +asmlinkage void __raw_spin_lock_asm(volatile int *ptr); +asmlinkage int __raw_spin_trylock_asm(volatile int *ptr); +asmlinkage void __raw_spin_unlock_asm(volatile int *ptr); +asmlinkage void __raw_read_lock_asm(volatile int *ptr); +asmlinkage int __raw_read_trylock_asm(volatile int *ptr); +asmlinkage void __raw_read_unlock_asm(volatile int *ptr); +asmlinkage void __raw_write_lock_asm(volatile int *ptr); +asmlinkage int __raw_write_trylock_asm(volatile int *ptr); +asmlinkage void __raw_write_unlock_asm(volatile int *ptr); + +static inline int arch_spin_is_locked(arch_spinlock_t *lock) +{ + return __raw_spin_is_locked_asm(&lock->lock); +} + +static inline void arch_spin_lock(arch_spinlock_t *lock) +{ + __raw_spin_lock_asm(&lock->lock); +} + +#define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock) + +static inline int arch_spin_trylock(arch_spinlock_t *lock) +{ + return __raw_spin_trylock_asm(&lock->lock); +} + +static inline void arch_spin_unlock(arch_spinlock_t *lock) +{ + __raw_spin_unlock_asm(&lock->lock); +} + +static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) +{ + while (arch_spin_is_locked(lock)) + cpu_relax(); +} + +static inline int arch_read_can_lock(arch_rwlock_t *rw) +{ + return __raw_uncached_fetch_asm(&rw->lock) > 0; +} + +static inline int arch_write_can_lock(arch_rwlock_t *rw) +{ + return __raw_uncached_fetch_asm(&rw->lock) == RW_LOCK_BIAS; +} + +static inline void arch_read_lock(arch_rwlock_t *rw) +{ + __raw_read_lock_asm(&rw->lock); +} + +#define arch_read_lock_flags(lock, flags) arch_read_lock(lock) + +static inline int arch_read_trylock(arch_rwlock_t *rw) +{ + return __raw_read_trylock_asm(&rw->lock); +} + +static inline void arch_read_unlock(arch_rwlock_t *rw) +{ + __raw_read_unlock_asm(&rw->lock); +} + +static inline void arch_write_lock(arch_rwlock_t *rw) +{ + __raw_write_lock_asm(&rw->lock); +} + +#define arch_write_lock_flags(lock, flags) arch_write_lock(lock) + +static inline int arch_write_trylock(arch_rwlock_t *rw) +{ + return __raw_write_trylock_asm(&rw->lock); +} + +static inline void arch_write_unlock(arch_rwlock_t *rw) +{ + __raw_write_unlock_asm(&rw->lock); +} + +#define arch_spin_relax(lock) cpu_relax() +#define arch_read_relax(lock) cpu_relax() +#define arch_write_relax(lock) cpu_relax() + +#endif + +#endif /* !__BFIN_SPINLOCK_H */ -- cgit 1.2.3-korg