locking/core, arch: Remove cpu_relax_lowlatency()

As there are no users left, we can remove cpu_relax_lowlatency()
implementations from every architecture.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Noam Camus <noamc@ezchip.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: virtualization@lists.linux-foundation.org
Cc: xen-devel@lists.xenproject.org
Cc: <linux-arch@vger.kernel.org>
Link: http://lkml.kernel.org/r/1477386195-32736-6-git-send-email-borntraeger@de.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/alpha/include/asm/processor.h

@@ -59,7 +59,6 @@ unsigned long get_wchan(struct task_struct *p);
 
 #define cpu_relax()	barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()
 
 #define ARCH_HAS_PREFETCH
 #define ARCH_HAS_PREFETCHW

arch/arc/include/asm/processor.h

@@ -61,7 +61,6 @@ struct task_struct;
 
 #define cpu_relax()		barrier()
 #define cpu_relax_yield()	cpu_relax()
-#define cpu_relax_lowlatency()	cpu_relax()
 
 #else
 
@@ -69,7 +68,6 @@ struct task_struct;
 	__asm__ __volatile__ (".word %0" : : "i"(CTOP_INST_SCHD_RW) : "memory")
 
 #define cpu_relax_yield()	cpu_relax()
-#define cpu_relax_lowlatency()	barrier()
 
 #endif
 

arch/arm/include/asm/processor.h

@@ -83,7 +83,6 @@ unsigned long get_wchan(struct task_struct *p);
 #endif
 
 #define cpu_relax_yield()  	              cpu_relax()
-#define cpu_relax_lowlatency()                cpu_relax()
 
 #define task_pt_regs(p) \
 	((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1)

arch/arm64/include/asm/processor.h

@@ -150,7 +150,6 @@ static inline void cpu_relax(void)
 }
 
 #define cpu_relax_yield()                     cpu_relax()
-#define cpu_relax_lowlatency()                cpu_relax()
 
 /* Thread switching */
 extern struct task_struct *cpu_switch_to(struct task_struct *prev,

arch/avr32/include/asm/processor.h

@@ -93,7 +93,6 @@ extern struct avr32_cpuinfo boot_cpu_data;
 
 #define cpu_relax()		barrier()
 #define cpu_relax_yield()	cpu_relax()
-#define cpu_relax_lowlatency()        cpu_relax()
 #define cpu_sync_pipeline()	asm volatile("sub pc, -2" : : : "memory")
 
 struct cpu_context {

arch/blackfin/include/asm/processor.h

@@ -93,7 +93,6 @@ unsigned long get_wchan(struct task_struct *p);
 
 #define cpu_relax()    	smp_mb()
 #define cpu_relax_yield()      cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()
 
 /* Get the Silicon Revision of the chip */
 static inline uint32_t __pure bfin_revid(void)

arch/c6x/include/asm/processor.h

@@ -122,7 +122,6 @@ extern unsigned long get_wchan(struct task_struct *p);
 
 #define cpu_relax()		do { } while (0)
 #define cpu_relax_yield()             cpu_relax()
-#define cpu_relax_lowlatency()        cpu_relax()
 
 extern const struct seq_operations cpuinfo_op;
 

arch/cris/include/asm/processor.h

@@ -64,7 +64,6 @@ static inline void release_thread(struct task_struct *dead_task)
 
 #define cpu_relax()     barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()
 
 void default_idle(void);
 

arch/frv/include/asm/processor.h

@@ -108,7 +108,6 @@ unsigned long get_wchan(struct task_struct *p);
 
 #define cpu_relax() barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()
 
 /* data cache prefetch */
 #define ARCH_HAS_PREFETCH

arch/h8300/include/asm/processor.h

@@ -128,7 +128,6 @@ unsigned long get_wchan(struct task_struct *p);
 
 #define cpu_relax()    barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency()	cpu_relax()
 
 #define HARD_RESET_NOW() ({		\
 	local_irq_disable();		\

arch/hexagon/include/asm/processor.h

@@ -57,7 +57,6 @@ struct thread_struct {
 
 #define cpu_relax() __vmyield()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()
 
 /*
  * Decides where the kernel will search for a free chunk of vm space during

arch/ia64/include/asm/processor.h

@@ -548,7 +548,6 @@ ia64_eoi (void)
 
 #define cpu_relax()	ia64_hint(ia64_hint_pause)
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()
 
 static inline int
 ia64_get_irr(unsigned int vector)

arch/m32r/include/asm/processor.h

@@ -134,6 +134,5 @@ unsigned long get_wchan(struct task_struct *p);
 
 #define cpu_relax()	barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()
 
 #endif /* _ASM_M32R_PROCESSOR_H */

arch/m68k/include/asm/processor.h

@@ -157,6 +157,5 @@ unsigned long get_wchan(struct task_struct *p);
 
 #define cpu_relax()	barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()
 
 #endif

arch/metag/include/asm/processor.h

@@ -153,7 +153,6 @@ unsigned long get_wchan(struct task_struct *p);
 
 #define cpu_relax()     barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency()  cpu_relax()
 
 extern void setup_priv(void);
 

arch/microblaze/include/asm/processor.h

@@ -23,7 +23,6 @@ extern const struct seq_operations cpuinfo_op;
 
 # define cpu_relax()		barrier()
 # define cpu_relax_yield() cpu_relax()
-# define cpu_relax_lowlatency()	cpu_relax()
 
 #define task_pt_regs(tsk) \
 		(((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1)

arch/mips/include/asm/processor.h

@@ -390,7 +390,6 @@ unsigned long get_wchan(struct task_struct *p);
 
 #define cpu_relax()	barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()
 
 /*
  * Return_address is a replacement for __builtin_return_address(count)

arch/mn10300/include/asm/processor.h

@@ -70,7 +70,6 @@ extern void dodgy_tsc(void);
 
 #define cpu_relax() barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()
 
 /*
  * User space process size: 1.75GB (default).

arch/nios2/include/asm/processor.h

@@ -89,7 +89,6 @@ extern unsigned long get_wchan(struct task_struct *p);
 
 #define cpu_relax()	barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency()  cpu_relax()
 
 #endif /* __ASSEMBLY__ */
 

arch/openrisc/include/asm/processor.h

@@ -93,7 +93,6 @@ extern unsigned long thread_saved_pc(struct task_struct *t);
 
 #define cpu_relax()     barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()
 
 #endif /* __ASSEMBLY__ */
 #endif /* __ASM_OPENRISC_PROCESSOR_H */