[RFC PATCH 13/16] s390: locks: remove unused arch_*_relax operations

[Will Deacon <will.deacon@arm.com>]

The arch_{read,write}_relax macros are not used anywhere in the
kernel and are typically just aliases for cpu_relax().

This patch removes the unused definitions for S390. arch_spin_relax is
left alone, since the S390 spinlock internals rely on (and export) this
symbol.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---
 arch/s390/include/asm/spinlock.h | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/s390/include/asm/spinlock.h b/arch/s390/include/asm/spinlock.h
index 701fe8c..8b030e2 100644
--- a/arch/s390/include/asm/spinlock.h
+++ b/arch/s390/include/asm/spinlock.h
@@ -170,7 +170,4 @@ static inline int arch_write_trylock(arch_rwlock_t *rw)
 	return _raw_write_trylock_retry(rw);
 }
 
-#define arch_read_relax(lock)	cpu_relax()
-#define arch_write_relax(lock)	cpu_relax()
-
 #endif /* __ASM_SPINLOCK_H */
-- 
1.8.2.2