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Commit 0160fb17 authored by Will Deacon's avatar Will Deacon Committed by Ingo Molnar
Browse files

locking/arch: Remove dummy arch_{read,spin,write}_relax() implementations 



arch_{read,spin,write}_relax() are defined as cpu_relax() by the core
code, so architectures that can't do better (i.e. most of them) don't
need to bother with the dummy definitions.

Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1507055129-12300-3-git-send-email-will.deacon@arm.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent a8a217c2

arch/arc/include/asm/spinlock.h

+0 −4
Original line number Diff line number Diff line
@@ -413,8 +413,4 @@ static inline void arch_write_unlock(arch_rwlock_t *rw) 
#define arch_read_lock_flags(lock, flags)	arch_read_lock(lock)

#define arch_write_lock_flags(lock, flags)	arch_write_lock(lock)



#define arch_spin_relax(lock)	cpu_relax()

#define arch_read_relax(lock)	cpu_relax()

#define arch_write_relax(lock)	cpu_relax()



#endif /* __ASM_SPINLOCK_H */

arch/arm/include/asm/spinlock.h

+0 −4
Original line number Diff line number Diff line
@@ -273,8 +273,4 @@ static inline int arch_read_trylock(arch_rwlock_t *rw) 
#define arch_read_lock_flags(lock, flags) arch_read_lock(lock)

#define arch_write_lock_flags(lock, flags) arch_write_lock(lock)



#define arch_spin_relax(lock)	cpu_relax()

#define arch_read_relax(lock)	cpu_relax()

#define arch_write_relax(lock)	cpu_relax()



#endif /* __ASM_SPINLOCK_H */

arch/arm64/include/asm/spinlock.h

+0 −4
Original line number Diff line number Diff line
@@ -306,10 +306,6 @@ static inline int arch_read_trylock(arch_rwlock_t *rw) 
#define arch_read_lock_flags(lock, flags) arch_read_lock(lock)

#define arch_write_lock_flags(lock, flags) arch_write_lock(lock)



#define arch_spin_relax(lock)	cpu_relax()

#define arch_read_relax(lock)	cpu_relax()

#define arch_write_relax(lock)	cpu_relax()



/* See include/linux/spinlock.h */

#define smp_mb__after_spinlock()	smp_mb()

arch/blackfin/include/asm/spinlock.h

+0 −4
Original line number Diff line number Diff line
@@ -82,10 +82,6 @@ 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 */

arch/ia64/include/asm/spinlock.h

+0 −4
Original line number Diff line number Diff line
@@ -269,8 +269,4 @@ static inline int arch_read_trylock(arch_rwlock_t *x) 
	return (u32)ia64_cmpxchg4_acq((__u32 *)(x), new.word, old.word) == old.word;

}



#define arch_spin_relax(lock)	cpu_relax()

#define arch_read_relax(lock)	cpu_relax()

#define arch_write_relax(lock)	cpu_relax()



#endif /*  _ASM_IA64_SPINLOCK_H */