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>
2016-10-25 11:03:15 +02:00 · 2016-10-25 11:03:15 +02:00 · 5bd0b85ba8
--- a/arch/alpha/include/asm/processor.h
+++ b/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
--- a/arch/arc/include/asm/processor.h
+++ b/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

--- a/arch/arm/include/asm/processor.h
+++ b/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)
--- a/arch/arm64/include/asm/processor.h
+++ b/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,
--- a/arch/avr32/include/asm/processor.h
+++ b/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 {
--- a/arch/blackfin/include/asm/processor.h
+++ b/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)
--- a/arch/c6x/include/asm/processor.h
+++ b/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;

--- a/arch/cris/include/asm/processor.h
+++ b/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);

--- a/arch/frv/include/asm/processor.h
+++ b/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
--- a/arch/h8300/include/asm/processor.h
+++ b/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();		\
--- a/arch/hexagon/include/asm/processor.h
+++ b/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
--- a/arch/ia64/include/asm/processor.h
+++ b/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)
--- a/arch/m32r/include/asm/processor.h
+++ b/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 */
--- a/arch/m68k/include/asm/processor.h
+++ b/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
--- a/arch/metag/include/asm/processor.h
+++ b/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);

--- a/arch/microblaze/include/asm/processor.h
+++ b/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)
--- a/arch/mips/include/asm/processor.h
+++ b/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)
--- a/arch/mn10300/include/asm/processor.h
+++ b/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).
--- a/arch/nios2/include/asm/processor.h
+++ b/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__ */

--- a/arch/openrisc/include/asm/processor.h
+++ b/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 */
--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@ -310,7 +310,6 @@ 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()

 /*
 * parisc_requires_coherency() is used to identify the combined VIPT/PIPT
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@ -405,7 +405,6 @@ static inline unsigned long __pack_fe01(unsigned int fpmode)
 #endif

 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()

 /* Check that a certain kernel stack pointer is valid in task_struct p */
 int validate_sp(unsigned long sp, struct task_struct *p,
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@ -237,7 +237,6 @@ static inline unsigned short stap(void)
 void cpu_relax_yield(void);

 #define cpu_relax() barrier()
-#define cpu_relax_lowlatency()  barrier()

 #define ECAG_CACHE_ATTRIBUTE	0
 #define ECAG_CPU_ATTRIBUTE	1
--- a/arch/score/include/asm/processor.h
+++ b/arch/score/include/asm/processor.h
@ -25,7 +25,6 @@ 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()
 #define release_thread(thread)	do {} while (0)

 /*
--- a/arch/sh/include/asm/processor.h
+++ b/arch/sh/include/asm/processor.h
@ -98,7 +98,6 @@ extern struct sh_cpuinfo cpu_data[];
 #define cpu_sleep()	__asm__ __volatile__ ("sleep" : : : "memory")
 #define cpu_relax()	barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()

 void default_idle(void);
 void stop_this_cpu(void *);
--- a/arch/sparc/include/asm/processor_32.h
+++ b/arch/sparc/include/asm/processor_32.h
@ -120,7 +120,6 @@ int do_mathemu(struct pt_regs *regs, struct task_struct *fpt);

 #define cpu_relax()	barrier()
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()

 extern void (*sparc_idle)(void);

--- a/arch/sparc/include/asm/processor_64.h
+++ b/arch/sparc/include/asm/processor_64.h
@ -217,7 +217,6 @@ unsigned long get_wchan(struct task_struct *task);
 				     ".previous"			\
 				     ::: "memory")
 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()

 /* Prefetch support.  This is tuned for UltraSPARC-III and later.
 * UltraSPARC-I will treat these as nops, and UltraSPARC-II has
--- a/arch/tile/include/asm/processor.h
+++ b/arch/tile/include/asm/processor.h
@ -265,7 +265,6 @@ static inline void cpu_relax(void)
 }

 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()

 /* Info on this processor (see fs/proc/cpuinfo.c) */
 struct seq_operations;
--- a/arch/unicore32/include/asm/processor.h
+++ b/arch/unicore32/include/asm/processor.h
@ -72,7 +72,6 @@ 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 task_pt_regs(p) \
 	((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1)
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@ -589,7 +589,6 @@ static __always_inline void cpu_relax(void)
 }

 #define cpu_relax_yield() cpu_relax()
-#define cpu_relax_lowlatency() cpu_relax()

 /* Stop speculative execution and prefetching of modified code. */
 static inline void sync_core(void)
--- a/arch/x86/um/asm/processor.h
+++ b/arch/x86/um/asm/processor.h
@ -27,7 +27,6 @@ static inline void rep_nop(void)

 #define cpu_relax()		rep_nop()
 #define cpu_relax_yield()	cpu_relax()
-#define cpu_relax_lowlatency()	cpu_relax()

 #define task_pt_regs(t) (&(t)->thread.regs)

--- a/arch/xtensa/include/asm/processor.h
+++ b/arch/xtensa/include/asm/processor.h
@ -207,7 +207,6 @@ 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()

 /* Special register access. */