[tip:locking/core] locking/core: Provide common cpu_relax_yield() definition
From: tip-bot for Christian Borntraeger
Date: Thu Nov 17 2016 - 02:50:04 EST
Commit-ID: 6d0d287891a022ebba572327cbd70b5de69a63a2
Gitweb: http://git.kernel.org/tip/6d0d287891a022ebba572327cbd70b5de69a63a2
Author: Christian Borntraeger <borntraeger@xxxxxxxxxx>
AuthorDate: Wed, 16 Nov 2016 13:23:05 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 17 Nov 2016 08:17:36 +0100
locking/core: Provide common cpu_relax_yield() definition
No need to duplicate the same define everywhere. Since
the only user is stop-machine and the only provider is
s390, we can use a default implementation of cpu_relax_yield()
in sched.h.
Suggested-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxx>
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Acked-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
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: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: kvm@xxxxxxxxxxxxxxx
Cc: linux-arch@xxxxxxxxxxxxxxx
Cc: linux-s390 <linux-s390@xxxxxxxxxxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Cc: sparclinux@xxxxxxxxxxxxxxx
Cc: virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/1479298985-191589-1-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 | 3 ---
arch/arm/include/asm/processor.h | 2 --
arch/arm64/include/asm/processor.h | 2 --
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 | 2 --
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 | 2 --
arch/unicore32/include/asm/processor.h | 1 -
arch/x86/include/asm/processor.h | 2 --
arch/x86/um/asm/processor.h | 1 -
arch/xtensa/include/asm/processor.h | 1 -
include/linux/sched.h | 4 ++++
33 files changed, 5 insertions(+), 38 deletions(-)
diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h
index 31e8dbe..2fec2de 100644
--- a/arch/alpha/include/asm/processor.h
+++ b/arch/alpha/include/asm/processor.h
@@ -58,7 +58,6 @@ unsigned long get_wchan(struct task_struct *p);
((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp)
#define cpu_relax() barrier()
-#define cpu_relax_yield() 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 d102a49..6e1242d 100644
--- a/arch/arc/include/asm/processor.h
+++ b/arch/arc/include/asm/processor.h
@@ -60,15 +60,12 @@ struct task_struct;
#ifndef CONFIG_EZNPS_MTM_EXT
#define cpu_relax() barrier()
-#define cpu_relax_yield() cpu_relax()
#else
#define cpu_relax() \
__asm__ __volatile__ (".word %0" : : "i"(CTOP_INST_SCHD_RW) : "memory")
-#define cpu_relax_yield() cpu_relax()
-
#endif
#define copy_segments(tsk, mm) do { } while (0)
diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h
index 9e71c58b..c3d5fc1 100644
--- a/arch/arm/include/asm/processor.h
+++ b/arch/arm/include/asm/processor.h
@@ -82,8 +82,6 @@ unsigned long get_wchan(struct task_struct *p);
#define cpu_relax() barrier()
#endif
-#define cpu_relax_yield() 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 6132f64..747c65a 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h
@@ -149,8 +149,6 @@ static inline void cpu_relax(void)
asm volatile("yield" ::: "memory");
}
-#define cpu_relax_yield() cpu_relax()
-
/* Thread switching */
extern struct task_struct *cpu_switch_to(struct task_struct *prev,
struct task_struct *next);
diff --git a/arch/avr32/include/asm/processor.h b/arch/avr32/include/asm/processor.h
index ee62365..972adcc 100644
--- a/arch/avr32/include/asm/processor.h
+++ b/arch/avr32/include/asm/processor.h
@@ -92,7 +92,6 @@ extern struct avr32_cpuinfo boot_cpu_data;
#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
#define cpu_relax() barrier()
-#define cpu_relax_yield() 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 57acfb1..85d4af9 100644
--- a/arch/blackfin/include/asm/processor.h
+++ b/arch/blackfin/include/asm/processor.h
@@ -92,7 +92,6 @@ unsigned long get_wchan(struct task_struct *p);
#define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
#define cpu_relax() smp_mb()
-#define cpu_relax_yield() 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 1fd22e7..b9eb3da 100644
--- a/arch/c6x/include/asm/processor.h
+++ b/arch/c6x/include/asm/processor.h
@@ -121,7 +121,6 @@ extern unsigned long get_wchan(struct task_struct *p);
#define KSTK_ESP(task) (task_pt_regs(task)->sp)
#define cpu_relax() do { } while (0)
-#define cpu_relax_yield() 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 1a57841..15b815d 100644
--- a/arch/cris/include/asm/processor.h
+++ b/arch/cris/include/asm/processor.h
@@ -63,7 +63,6 @@ static inline void release_thread(struct task_struct *dead_task)
#define init_stack (init_thread_union.stack)
#define cpu_relax() barrier()
-#define cpu_relax_yield() cpu_relax()
void default_idle(void);
diff --git a/arch/frv/include/asm/processor.h b/arch/frv/include/asm/processor.h
index c1e5f2a..ddaeb9c 100644
--- a/arch/frv/include/asm/processor.h
+++ b/arch/frv/include/asm/processor.h
@@ -107,7 +107,6 @@ unsigned long get_wchan(struct task_struct *p);
#define KSTK_ESP(tsk) ((tsk)->thread.frame0->sp)
#define cpu_relax() barrier()
-#define cpu_relax_yield() 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 42d6053..65132d7 100644
--- a/arch/h8300/include/asm/processor.h
+++ b/arch/h8300/include/asm/processor.h
@@ -127,7 +127,6 @@ unsigned long get_wchan(struct task_struct *p);
#define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
#define cpu_relax() barrier()
-#define cpu_relax_yield() 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 5d694cc..45a8254 100644
--- a/arch/hexagon/include/asm/processor.h
+++ b/arch/hexagon/include/asm/processor.h
@@ -56,7 +56,6 @@ struct thread_struct {
}
#define cpu_relax() __vmyield()
-#define cpu_relax_yield() 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 0c2c3b2..03911a3 100644
--- a/arch/ia64/include/asm/processor.h
+++ b/arch/ia64/include/asm/processor.h
@@ -547,7 +547,6 @@ ia64_eoi (void)
}
#define cpu_relax() ia64_hint(ia64_hint_pause)
-#define cpu_relax_yield() 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 9b83a13..5767367 100644
--- a/arch/m32r/include/asm/processor.h
+++ b/arch/m32r/include/asm/processor.h
@@ -133,6 +133,5 @@ unsigned long get_wchan(struct task_struct *p);
#define KSTK_ESP(tsk) ((tsk)->thread.sp)
#define cpu_relax() barrier()
-#define cpu_relax_yield() cpu_relax()
#endif /* _ASM_M32R_PROCESSOR_H */
diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h
index b0d0442..f5f790c 100644
--- a/arch/m68k/include/asm/processor.h
+++ b/arch/m68k/include/asm/processor.h
@@ -156,6 +156,5 @@ unsigned long get_wchan(struct task_struct *p);
#define task_pt_regs(tsk) ((struct pt_regs *) ((tsk)->thread.esp0))
#define cpu_relax() barrier()
-#define cpu_relax_yield() cpu_relax()
#endif
diff --git a/arch/metag/include/asm/processor.h b/arch/metag/include/asm/processor.h
index ee302a6..ec6a490 100644
--- a/arch/metag/include/asm/processor.h
+++ b/arch/metag/include/asm/processor.h
@@ -152,7 +152,6 @@ unsigned long get_wchan(struct task_struct *p);
#define user_stack_pointer(regs) ((regs)->ctx.AX[0].U0)
#define cpu_relax() barrier()
-#define cpu_relax_yield() cpu_relax()
extern void setup_priv(void);
diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
index 08ec1f7..37ef196 100644
--- a/arch/microblaze/include/asm/processor.h
+++ b/arch/microblaze/include/asm/processor.h
@@ -22,7 +22,6 @@
extern const struct seq_operations cpuinfo_op;
# define cpu_relax() barrier()
-# define cpu_relax_yield() 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 8ea95e7..95b8c47 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -389,7 +389,6 @@ unsigned long get_wchan(struct task_struct *p);
#define KSTK_STATUS(tsk) (task_pt_regs(tsk)->cp0_status)
#define cpu_relax() barrier()
-#define cpu_relax_yield() 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 d11397b..18e17ab 100644
--- a/arch/mn10300/include/asm/processor.h
+++ b/arch/mn10300/include/asm/processor.h
@@ -69,7 +69,6 @@ extern void print_cpu_info(struct mn10300_cpuinfo *);
extern void dodgy_tsc(void);
#define cpu_relax() barrier()
-#define cpu_relax_yield() 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 d32c176..3bbbc3d 100644
--- a/arch/nios2/include/asm/processor.h
+++ b/arch/nios2/include/asm/processor.h
@@ -88,7 +88,6 @@ extern unsigned long get_wchan(struct task_struct *p);
#define KSTK_ESP(tsk) ((tsk)->thread.kregs->sp)
#define cpu_relax() barrier()
-#define cpu_relax_yield() cpu_relax()
#endif /* __ASSEMBLY__ */
diff --git a/arch/openrisc/include/asm/processor.h b/arch/openrisc/include/asm/processor.h
index 7f47fc7..a908e6c 100644
--- a/arch/openrisc/include/asm/processor.h
+++ b/arch/openrisc/include/asm/processor.h
@@ -92,7 +92,6 @@ extern unsigned long thread_saved_pc(struct task_struct *t);
#define init_stack (init_thread_union.stack)
#define cpu_relax() barrier()
-#define cpu_relax_yield() 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 a4a07f4..ca40741 100644
--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@@ -309,7 +309,6 @@ extern unsigned long get_wchan(struct task_struct *p);
#define KSTK_ESP(tsk) ((tsk)->thread.regs.gr[30])
#define cpu_relax() barrier()
-#define cpu_relax_yield() 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 5684e68..dac83fc 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -404,8 +404,6 @@ static inline unsigned long __pack_fe01(unsigned int fpmode)
#define cpu_relax() barrier()
#endif
-#define cpu_relax_yield() 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,
unsigned long nbytes);
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 9e32f25..9d3a21a 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -234,6 +234,7 @@ static inline unsigned short stap(void)
/*
* Give up the time slice of the virtual PU.
*/
+#define cpu_relax_yield cpu_relax_yield
void cpu_relax_yield(void);
#define cpu_relax() barrier()
diff --git a/arch/score/include/asm/processor.h b/arch/score/include/asm/processor.h
index a1e97c0..d9a922d 100644
--- a/arch/score/include/asm/processor.h
+++ b/arch/score/include/asm/processor.h
@@ -24,7 +24,6 @@ extern unsigned long get_wchan(struct task_struct *p);
#define current_text_addr() ({ __label__ _l; _l: &&_l; })
#define cpu_relax() barrier()
-#define cpu_relax_yield() 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 9454ff1..5addd69 100644
--- a/arch/sh/include/asm/processor.h
+++ b/arch/sh/include/asm/processor.h
@@ -97,7 +97,6 @@ extern struct sh_cpuinfo cpu_data[];
#define cpu_sleep() __asm__ __volatile__ ("sleep" : : : "memory")
#define cpu_relax() barrier()
-#define cpu_relax_yield() 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 fc32b73..365d4cb 100644
--- a/arch/sparc/include/asm/processor_32.h
+++ b/arch/sparc/include/asm/processor_32.h
@@ -119,7 +119,6 @@ extern struct task_struct *last_task_used_math;
int do_mathemu(struct pt_regs *regs, struct task_struct *fpt);
#define cpu_relax() barrier()
-#define cpu_relax_yield() 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 12787df..6448cfc 100644
--- a/arch/sparc/include/asm/processor_64.h
+++ b/arch/sparc/include/asm/processor_64.h
@@ -216,7 +216,6 @@ unsigned long get_wchan(struct task_struct *task);
"nop\n\t" \
".previous" \
::: "memory")
-#define cpu_relax_yield() 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 c1c228b..0bc9968 100644
--- a/arch/tile/include/asm/processor.h
+++ b/arch/tile/include/asm/processor.h
@@ -264,8 +264,6 @@ static inline void cpu_relax(void)
barrier();
}
-#define cpu_relax_yield() cpu_relax()
-
/* Info on this processor (see fs/proc/cpuinfo.c) */
struct seq_operations;
extern const struct seq_operations cpuinfo_op;
diff --git a/arch/unicore32/include/asm/processor.h b/arch/unicore32/include/asm/processor.h
index eeefe7c..4eaa421 100644
--- a/arch/unicore32/include/asm/processor.h
+++ b/arch/unicore32/include/asm/processor.h
@@ -71,7 +71,6 @@ extern void release_thread(struct task_struct *);
unsigned long get_wchan(struct task_struct *p);
#define cpu_relax() barrier()
-#define cpu_relax_yield() 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 7513c99..c84605b 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -588,8 +588,6 @@ static __always_inline void cpu_relax(void)
rep_nop();
}
-#define cpu_relax_yield() 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 b4bd63b..c77db22 100644
--- a/arch/x86/um/asm/processor.h
+++ b/arch/x86/um/asm/processor.h
@@ -26,7 +26,6 @@ static inline void rep_nop(void)
}
#define cpu_relax() rep_nop()
-#define cpu_relax_yield() 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 7d8d6be..86ffcd6 100644
--- a/arch/xtensa/include/asm/processor.h
+++ b/arch/xtensa/include/asm/processor.h
@@ -206,7 +206,6 @@ extern unsigned long get_wchan(struct task_struct *p);
#define KSTK_ESP(tsk) (task_pt_regs(tsk)->areg[1])
#define cpu_relax() barrier()
-#define cpu_relax_yield() cpu_relax()
/* Special register access. */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 348f51b..c1aa3b0 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2444,6 +2444,10 @@ static inline void calc_load_enter_idle(void) { }
static inline void calc_load_exit_idle(void) { }
#endif /* CONFIG_NO_HZ_COMMON */
+#ifndef cpu_relax_yield
+#define cpu_relax_yield() cpu_relax()
+#endif
+
/*
* Do not use outside of architecture code which knows its limitations.
*