[tip:locking/core] locking/core, arch: Remove cpu_relax_lowlatency()

From: tip-bot for Christian Borntraeger
Date: Wed Nov 16 2016 - 07:12:52 EST

Next message: Chao Yu: "[PATCH] f2fs: fix fdatasync"
Previous message: tip-bot for Martin Schwidefsky: "[tip:sched/core] sched/x86: Do not clear PREEMPT_NEED_RESCHED on preempt count reset"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Commit-ID: 5bd0b85ba8bb9de6f61f33f3752fc85f4c87fc22
Gitweb: http://git.kernel.org/tip/5bd0b85ba8bb9de6f61f33f3752fc85f4c87fc22
Author: Christian Borntraeger <borntraeger@xxxxxxxxxx>
AuthorDate: Tue, 25 Oct 2016 11:03:15 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 16 Nov 2016 10:15:11 +0100

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@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Noam Camus <noamc@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Cc: virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Cc: <linux-arch@xxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1477386195-32736-6-git-send-email-borntraeger@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/alpha/include/asm/processor.h | 1 -
arch/arc/include/asm/processor.h | 2 --
arch/arm/include/asm/processor.h | 1 -
arch/arm64/include/asm/processor.h | 1 -
arch/avr32/include/asm/processor.h | 1 -
arch/blackfin/include/asm/processor.h | 1 -
arch/c6x/include/asm/processor.h | 1 -
arch/cris/include/asm/processor.h | 1 -
arch/frv/include/asm/processor.h | 1 -
arch/h8300/include/asm/processor.h | 1 -
arch/hexagon/include/asm/processor.h | 1 -
arch/ia64/include/asm/processor.h | 1 -
arch/m32r/include/asm/processor.h | 1 -
arch/m68k/include/asm/processor.h | 1 -
arch/metag/include/asm/processor.h | 1 -
arch/microblaze/include/asm/processor.h | 1 -
arch/mips/include/asm/processor.h | 1 -
arch/mn10300/include/asm/processor.h | 1 -
arch/nios2/include/asm/processor.h | 1 -
arch/openrisc/include/asm/processor.h | 1 -
arch/parisc/include/asm/processor.h | 1 -
arch/powerpc/include/asm/processor.h | 1 -
arch/s390/include/asm/processor.h | 1 -
arch/score/include/asm/processor.h | 1 -
arch/sh/include/asm/processor.h | 1 -
arch/sparc/include/asm/processor_32.h | 1 -
arch/sparc/include/asm/processor_64.h | 1 -
arch/tile/include/asm/processor.h | 1 -
arch/unicore32/include/asm/processor.h | 1 -
arch/x86/include/asm/processor.h | 1 -
arch/x86/um/asm/processor.h | 1 -
arch/xtensa/include/asm/processor.h | 1 -
32 files changed, 33 deletions(-)

diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h
index 0556fda..31e8dbe 100644
--- 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
diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h
index 6c158d5..d102a49 100644
--- 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

diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h
index db660e0..9e71c58b 100644
--- 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)
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index 3f9b0e5..6132f64 100644
--- 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,
diff --git a/arch/avr32/include/asm/processor.h b/arch/avr32/include/asm/processor.h
index e412e8b..ee62365 100644
--- 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 {
diff --git a/arch/blackfin/include/asm/processor.h b/arch/blackfin/include/asm/processor.h
index 8b8704a..57acfb1 100644
--- 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)
diff --git a/arch/c6x/include/asm/processor.h b/arch/c6x/include/asm/processor.h
index 914d730..1fd22e7 100644
--- 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;

diff --git a/arch/cris/include/asm/processor.h b/arch/cris/include/asm/processor.h
index 01dd52e..1a57841 100644
--- 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);

diff --git a/arch/frv/include/asm/processor.h b/arch/frv/include/asm/processor.h
index 4d00d65..c1e5f2a 100644
--- 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
diff --git a/arch/h8300/include/asm/processor.h b/arch/h8300/include/asm/processor.h
index 683a061..42d6053 100644
--- 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(); \
diff --git a/arch/hexagon/include/asm/processor.h b/arch/hexagon/include/asm/processor.h
index 1558ddb..5d694cc 100644
--- 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
diff --git a/arch/ia64/include/asm/processor.h b/arch/ia64/include/asm/processor.h
index 4654b71..0c2c3b2 100644
--- 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)
diff --git a/arch/m32r/include/asm/processor.h b/arch/m32r/include/asm/processor.h
index b262037..9b83a13 100644
--- 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 */
diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h
index 13e07ae..b0d0442 100644
--- 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
diff --git a/arch/metag/include/asm/processor.h b/arch/metag/include/asm/processor.h
index 61d6e27..ee302a6 100644
--- 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);

diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
index fd7dd11..08ec1f7 100644
--- 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)
diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index 9a656f6..8ea95e7 100644
--- 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)
diff --git a/arch/mn10300/include/asm/processor.h b/arch/mn10300/include/asm/processor.h
index 89f63d1..d11397b 100644
--- 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).
diff --git a/arch/nios2/include/asm/processor.h b/arch/nios2/include/asm/processor.h
index 303e593..d32c176 100644
--- 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__ */

diff --git a/arch/openrisc/include/asm/processor.h b/arch/openrisc/include/asm/processor.h
index 6ecfc2a..7f47fc7 100644
--- 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 */
diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h
index ea2ff9f..a4a07f4 100644
--- 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
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index 908fa7c..5684e68 100644
--- 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,
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 79343e3..9e32f25 100644
--- 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
diff --git a/arch/score/include/asm/processor.h b/arch/score/include/asm/processor.h
index e8e87b4..a1e97c0 100644
--- 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)

/*
diff --git a/arch/sh/include/asm/processor.h b/arch/sh/include/asm/processor.h
index 099a991..9454ff1 100644
--- 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 *);
diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h
index 50e908a3c..fc32b73 100644
--- 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);

diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h
index 3e8fac7..12787df 100644
--- 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
diff --git a/arch/tile/include/asm/processor.h b/arch/tile/include/asm/processor.h
index 91a39a5..c1c228b 100644
--- 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;
diff --git a/arch/unicore32/include/asm/processor.h b/arch/unicore32/include/asm/processor.h
index fc54d5d..eeefe7c 100644
--- 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)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 44adada..7513c99 100644
--- 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)
diff --git a/arch/x86/um/asm/processor.h b/arch/x86/um/asm/processor.h
index 01597af..b4bd63b 100644
--- 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)

diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h
index fe14dc2..7d8d6be 100644
--- 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. */

Next message: Chao Yu: "[PATCH] f2fs: fix fdatasync"
Previous message: tip-bot for Martin Schwidefsky: "[tip:sched/core] sched/x86: Do not clear PREEMPT_NEED_RESCHED on preempt count reset"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]