提交 5bd0b85b 编写于 作者: C Christian Borntraeger 提交者: Ingo Molnar

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: NChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: NPeter 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.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
上级 f2f09a4c
......@@ -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
......
......@@ -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
......
......@@ -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)
......
......@@ -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,
......
......@@ -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 {
......
......@@ -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)
......
......@@ -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;
......
......@@ -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);
......
......@@ -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
......
......@@ -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(); \
......
......@@ -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
......
......@@ -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)
......
......@@ -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 */
......@@ -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
......@@ -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);
......
......@@ -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)
......
......@@ -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)
......
......@@ -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).
......
......@@ -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__ */
......
......@@ -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 */
......@@ -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
......
......@@ -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,
......
......@@ -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
......
......@@ -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)
/*
......
......@@ -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 *);
......
......@@ -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);
......
......@@ -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
......
......@@ -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;
......
......@@ -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)
......
......@@ -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)
......
......@@ -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)
......
......@@ -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. */
......
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