From 890658b7ab48d1362a0362df842cecc73c83146f Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Tue, 23 Aug 2016 13:36:04 +0200 Subject: locking/mutex: Kill arch specific code Its all generic atomic_long_t stuff now. Tested-by: Jason Low Signed-off-by: Peter Zijlstra (Intel) Cc: Andrew Morton Cc: Linus Torvalds Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar --- arch/ia64/include/asm/mutex.h | 90 ------------------------------------------- 1 file changed, 90 deletions(-) delete mode 100644 arch/ia64/include/asm/mutex.h (limited to 'arch/ia64') diff --git a/arch/ia64/include/asm/mutex.h b/arch/ia64/include/asm/mutex.h deleted file mode 100644 index 28cb819e0ff9..000000000000 --- a/arch/ia64/include/asm/mutex.h +++ /dev/null @@ -1,90 +0,0 @@ -/* - * ia64 implementation of the mutex fastpath. - * - * Copyright (C) 2006 Ken Chen - * - */ - -#ifndef _ASM_MUTEX_H -#define _ASM_MUTEX_H - -/** - * __mutex_fastpath_lock - try to take the lock by moving the count - * from 1 to a 0 value - * @count: pointer of type atomic_t - * @fail_fn: function to call if the original value was not 1 - * - * Change the count from 1 to a value lower than 1, and call if - * it wasn't 1 originally. This function MUST leave the value lower than - * 1 even when the "1" assertion wasn't true. - */ -static inline void -__mutex_fastpath_lock(atomic_t *count, void (*fail_fn)(atomic_t *)) -{ - if (unlikely(ia64_fetchadd4_acq(count, -1) != 1)) - fail_fn(count); -} - -/** - * __mutex_fastpath_lock_retval - try to take the lock by moving the count - * from 1 to a 0 value - * @count: pointer of type atomic_t - * - * Change the count from 1 to a value lower than 1. This function returns 0 - * if the fastpath succeeds, or -1 otherwise. - */ -static inline int -__mutex_fastpath_lock_retval(atomic_t *count) -{ - if (unlikely(ia64_fetchadd4_acq(count, -1) != 1)) - return -1; - return 0; -} - -/** - * __mutex_fastpath_unlock - try to promote the count from 0 to 1 - * @count: pointer of type atomic_t - * @fail_fn: function to call if the original value was not 0 - * - * Try to promote the count from 0 to 1. If it wasn't 0, call . - * In the failure case, this function is allowed to either set the value to - * 1, or to set it to a value lower than 1. - * - * If the implementation sets it to a value of lower than 1, then the - * __mutex_slowpath_needs_to_unlock() macro needs to return 1, it needs - * to return 0 otherwise. - */ -static inline void -__mutex_fastpath_unlock(atomic_t *count, void (*fail_fn)(atomic_t *)) -{ - int ret = ia64_fetchadd4_rel(count, 1); - if (unlikely(ret < 0)) - fail_fn(count); -} - -#define __mutex_slowpath_needs_to_unlock() 1 - -/** - * __mutex_fastpath_trylock - try to acquire the mutex, without waiting - * - * @count: pointer of type atomic_t - * @fail_fn: fallback function - * - * Change the count from 1 to a value lower than 1, and return 0 (failure) - * if it wasn't 1 originally, or return 1 (success) otherwise. This function - * MUST leave the value lower than 1 even when the "1" assertion wasn't true. - * Additionally, if the value was < 0 originally, this function must not leave - * it to 0 on failure. - * - * If the architecture has no effective trylock variant, it should call the - * spinlock-based trylock variant unconditionally. - */ -static inline int -__mutex_fastpath_trylock(atomic_t *count, int (*fail_fn)(atomic_t *)) -{ - if (atomic_read(count) == 1 && cmpxchg_acq(count, 1, 0) == 1) - return 1; - return 0; -} - -#endif -- cgit v1.2.3 From 79ab11cdb90d8536817ab7357ecb6b1ff76be26c Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Tue, 25 Oct 2016 11:03:11 +0200 Subject: locking/core: Introduce cpu_relax_yield() For spinning loops people do often use barrier() or cpu_relax(). For most architectures cpu_relax and barrier are the same, but on some architectures cpu_relax can add some latency. For example on power,sparc64 and arc, cpu_relax can shift the CPU towards other hardware threads in an SMT environment. On s390 cpu_relax does even more, it uses an hypercall to the hypervisor to give up the timeslice. In contrast to the SMT yielding this can result in larger latencies. In some places this latency is unwanted, so another variant "cpu_relax_lowlatency" was introduced. Before this is used in more and more places, lets revert the logic and provide a cpu_relax_yield that can be called in places where yielding is more important than latency. By default this is the same as cpu_relax on all architectures. Signed-off-by: Christian Borntraeger Signed-off-by: Peter Zijlstra (Intel) Cc: Catalin Marinas Cc: Heiko Carstens Cc: Linus Torvalds Cc: Martin Schwidefsky Cc: Nicholas Piggin Cc: Noam Camus Cc: Peter Zijlstra Cc: Russell King Cc: Thomas Gleixner Cc: Will Deacon Cc: linuxppc-dev@lists.ozlabs.org Cc: virtualization@lists.linux-foundation.org Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/1477386195-32736-2-git-send-email-borntraeger@de.ibm.com Signed-off-by: Ingo Molnar --- 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 | 3 ++- arch/s390/kernel/processor.c | 4 ++-- 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 + 33 files changed, 36 insertions(+), 3 deletions(-) (limited to 'arch/ia64') diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h index 43a7559c448b..0556fda7bc6d 100644 --- a/arch/alpha/include/asm/processor.h +++ b/arch/alpha/include/asm/processor.h @@ -58,6 +58,7 @@ 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 cpu_relax_lowlatency() cpu_relax() #define ARCH_HAS_PREFETCH diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h index 16b630fbeb6a..6c158d576355 100644 --- a/arch/arc/include/asm/processor.h +++ b/arch/arc/include/asm/processor.h @@ -60,6 +60,7 @@ struct task_struct; #ifndef CONFIG_EZNPS_MTM_EXT #define cpu_relax() barrier() +#define cpu_relax_yield() cpu_relax() #define cpu_relax_lowlatency() cpu_relax() #else @@ -67,6 +68,7 @@ struct task_struct; #define cpu_relax() \ __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 8a1e8e995dae..db660e0b4bd3 100644 --- a/arch/arm/include/asm/processor.h +++ b/arch/arm/include/asm/processor.h @@ -82,6 +82,7 @@ unsigned long get_wchan(struct task_struct *p); #define cpu_relax() barrier() #endif +#define cpu_relax_yield() cpu_relax() #define cpu_relax_lowlatency() cpu_relax() #define task_pt_regs(p) \ diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 60e34824e18c..3f9b0e54dae3 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -149,6 +149,7 @@ static inline void cpu_relax(void) asm volatile("yield" ::: "memory"); } +#define cpu_relax_yield() cpu_relax() #define cpu_relax_lowlatency() cpu_relax() /* Thread switching */ diff --git a/arch/avr32/include/asm/processor.h b/arch/avr32/include/asm/processor.h index 941593c7d9f3..e412e8b68a7d 100644 --- a/arch/avr32/include/asm/processor.h +++ b/arch/avr32/include/asm/processor.h @@ -92,6 +92,7 @@ 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_relax_lowlatency() cpu_relax() #define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory") diff --git a/arch/blackfin/include/asm/processor.h b/arch/blackfin/include/asm/processor.h index 0c265aba94ad..8b8704a44b77 100644 --- a/arch/blackfin/include/asm/processor.h +++ b/arch/blackfin/include/asm/processor.h @@ -92,6 +92,7 @@ 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() #define cpu_relax_lowlatency() cpu_relax() /* Get the Silicon Revision of the chip */ diff --git a/arch/c6x/include/asm/processor.h b/arch/c6x/include/asm/processor.h index f2ef31be2f8b..914d7308bdb4 100644 --- a/arch/c6x/include/asm/processor.h +++ b/arch/c6x/include/asm/processor.h @@ -121,6 +121,7 @@ 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() #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 862126b58116..01dd52ecac84 100644 --- a/arch/cris/include/asm/processor.h +++ b/arch/cris/include/asm/processor.h @@ -63,6 +63,7 @@ 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() #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 73f0a79ad8e6..4d00d65f5e5e 100644 --- a/arch/frv/include/asm/processor.h +++ b/arch/frv/include/asm/processor.h @@ -107,6 +107,7 @@ 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() #define cpu_relax_lowlatency() cpu_relax() /* data cache prefetch */ diff --git a/arch/h8300/include/asm/processor.h b/arch/h8300/include/asm/processor.h index 111df7397ac7..683a061c3cb5 100644 --- a/arch/h8300/include/asm/processor.h +++ b/arch/h8300/include/asm/processor.h @@ -127,6 +127,7 @@ 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 cpu_relax_lowlatency() cpu_relax() #define HARD_RESET_NOW() ({ \ diff --git a/arch/hexagon/include/asm/processor.h b/arch/hexagon/include/asm/processor.h index d8501137c8d0..1558ddb9e5d7 100644 --- a/arch/hexagon/include/asm/processor.h +++ b/arch/hexagon/include/asm/processor.h @@ -56,6 +56,7 @@ struct thread_struct { } #define cpu_relax() __vmyield() +#define cpu_relax_yield() cpu_relax() #define cpu_relax_lowlatency() cpu_relax() /* diff --git a/arch/ia64/include/asm/processor.h b/arch/ia64/include/asm/processor.h index ce53c50d0ba4..4654b71dc8db 100644 --- a/arch/ia64/include/asm/processor.h +++ b/arch/ia64/include/asm/processor.h @@ -547,6 +547,7 @@ 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 diff --git a/arch/m32r/include/asm/processor.h b/arch/m32r/include/asm/processor.h index 9f8fd9bef70f..b2620370320d 100644 --- a/arch/m32r/include/asm/processor.h +++ b/arch/m32r/include/asm/processor.h @@ -133,6 +133,7 @@ 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() #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 c84a2183b3f0..13e07ae6786d 100644 --- a/arch/m68k/include/asm/processor.h +++ b/arch/m68k/include/asm/processor.h @@ -156,6 +156,7 @@ 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() #define cpu_relax_lowlatency() cpu_relax() #endif diff --git a/arch/metag/include/asm/processor.h b/arch/metag/include/asm/processor.h index a0333ebcac35..61d6e2722893 100644 --- a/arch/metag/include/asm/processor.h +++ b/arch/metag/include/asm/processor.h @@ -152,6 +152,7 @@ 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() #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 c38d0dd91134..fd7dd11c730a 100644 --- a/arch/microblaze/include/asm/processor.h +++ b/arch/microblaze/include/asm/processor.h @@ -22,6 +22,7 @@ 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) \ diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h index 0d36c87acbe2..9a656f6afc7c 100644 --- a/arch/mips/include/asm/processor.h +++ b/arch/mips/include/asm/processor.h @@ -389,6 +389,7 @@ 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() #define cpu_relax_lowlatency() cpu_relax() /* diff --git a/arch/mn10300/include/asm/processor.h b/arch/mn10300/include/asm/processor.h index b10ba121c849..89f63d1720ee 100644 --- a/arch/mn10300/include/asm/processor.h +++ b/arch/mn10300/include/asm/processor.h @@ -69,6 +69,7 @@ extern void print_cpu_info(struct mn10300_cpuinfo *); extern void dodgy_tsc(void); #define cpu_relax() barrier() +#define cpu_relax_yield() cpu_relax() #define cpu_relax_lowlatency() cpu_relax() /* diff --git a/arch/nios2/include/asm/processor.h b/arch/nios2/include/asm/processor.h index 1c953f0cadbf..303e5932a733 100644 --- a/arch/nios2/include/asm/processor.h +++ b/arch/nios2/include/asm/processor.h @@ -88,6 +88,7 @@ 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() #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 70334c9f7d24..6ecfc2ab28e4 100644 --- a/arch/openrisc/include/asm/processor.h +++ b/arch/openrisc/include/asm/processor.h @@ -92,6 +92,7 @@ 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() #define cpu_relax_lowlatency() cpu_relax() #endif /* __ASSEMBLY__ */ diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h index 2e674e13e005..ea2ff9febffd 100644 --- a/arch/parisc/include/asm/processor.h +++ b/arch/parisc/include/asm/processor.h @@ -309,6 +309,7 @@ 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() #define cpu_relax_lowlatency() cpu_relax() /* diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index c07c31b0e89e..908fa7cb3fb3 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -404,6 +404,7 @@ static inline unsigned long __pack_fe01(unsigned int fpmode) #define cpu_relax() barrier() #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 */ diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 602af692efdc..5bb44333d320 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -234,8 +234,9 @@ static inline unsigned short stap(void) /* * Give up the time slice of the virtual PU. */ -void cpu_relax(void); +void cpu_relax_yield(void); +#define cpu_relax() cpu_relax_yield() #define cpu_relax_lowlatency() barrier() #define ECAG_CACHE_ATTRIBUTE 0 diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c index 81d0808085e6..9e60ef144d03 100644 --- a/arch/s390/kernel/processor.c +++ b/arch/s390/kernel/processor.c @@ -53,7 +53,7 @@ void s390_update_cpu_mhz(void) on_each_cpu(update_cpu_mhz, NULL, 0); } -void notrace cpu_relax(void) +void notrace cpu_relax_yield(void) { if (!smp_cpu_mtid && MACHINE_HAS_DIAG44) { diag_stat_inc(DIAG_STAT_X044); @@ -61,7 +61,7 @@ void notrace cpu_relax(void) } barrier(); } -EXPORT_SYMBOL(cpu_relax); +EXPORT_SYMBOL(cpu_relax_yield); /* * cpu_init - initializes state that is per-CPU. diff --git a/arch/score/include/asm/processor.h b/arch/score/include/asm/processor.h index 851f441991d2..e8e87b4d7971 100644 --- a/arch/score/include/asm/processor.h +++ b/arch/score/include/asm/processor.h @@ -24,6 +24,7 @@ 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 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 f9a09942a32d..099a99105e1c 100644 --- a/arch/sh/include/asm/processor.h +++ b/arch/sh/include/asm/processor.h @@ -97,6 +97,7 @@ 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); diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h index 812fd08f3e62..50e908a3c651 100644 --- a/arch/sparc/include/asm/processor_32.h +++ b/arch/sparc/include/asm/processor_32.h @@ -119,6 +119,7 @@ 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() #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 ce2595c89471..3e8fac724f18 100644 --- a/arch/sparc/include/asm/processor_64.h +++ b/arch/sparc/include/asm/processor_64.h @@ -216,6 +216,7 @@ unsigned long get_wchan(struct task_struct *task); "nop\n\t" \ ".previous" \ ::: "memory") +#define cpu_relax_yield() cpu_relax() #define cpu_relax_lowlatency() cpu_relax() /* Prefetch support. This is tuned for UltraSPARC-III and later. diff --git a/arch/tile/include/asm/processor.h b/arch/tile/include/asm/processor.h index 0684e88aacd8..91a39a50520d 100644 --- a/arch/tile/include/asm/processor.h +++ b/arch/tile/include/asm/processor.h @@ -264,6 +264,7 @@ static inline void cpu_relax(void) barrier(); } +#define cpu_relax_yield() cpu_relax() #define cpu_relax_lowlatency() cpu_relax() /* Info on this processor (see fs/proc/cpuinfo.c) */ diff --git a/arch/unicore32/include/asm/processor.h b/arch/unicore32/include/asm/processor.h index 8d21b7adf26b..fc54d5d50419 100644 --- a/arch/unicore32/include/asm/processor.h +++ b/arch/unicore32/include/asm/processor.h @@ -71,6 +71,7 @@ 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 cpu_relax_lowlatency() cpu_relax() #define task_pt_regs(p) \ diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 984a7bf17f6a..44adadab44d6 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -588,6 +588,7 @@ static __always_inline void cpu_relax(void) rep_nop(); } +#define cpu_relax_yield() cpu_relax() #define cpu_relax_lowlatency() cpu_relax() /* Stop speculative execution and prefetching of modified code. */ diff --git a/arch/x86/um/asm/processor.h b/arch/x86/um/asm/processor.h index 233ee09c1ce8..01597afa8888 100644 --- a/arch/x86/um/asm/processor.h +++ b/arch/x86/um/asm/processor.h @@ -26,6 +26,7 @@ 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 b42d68bfe3cf..fe14dc2b394a 100644 --- a/arch/xtensa/include/asm/processor.h +++ b/arch/xtensa/include/asm/processor.h @@ -206,6 +206,7 @@ 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() #define cpu_relax_lowlatency() cpu_relax() /* Special register access. */ -- cgit v1.2.3 From 5bd0b85ba8bb9de6f61f33f3752fc85f4c87fc22 Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Tue, 25 Oct 2016 11:03:15 +0200 Subject: 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 Signed-off-by: Peter Zijlstra (Intel) Cc: Catalin Marinas Cc: Heiko Carstens Cc: Linus Torvalds Cc: Martin Schwidefsky Cc: Nicholas Piggin Cc: Noam Camus Cc: Peter Zijlstra Cc: Russell King Cc: Thomas Gleixner Cc: Will Deacon Cc: linuxppc-dev@lists.ozlabs.org Cc: virtualization@lists.linux-foundation.org Cc: xen-devel@lists.xenproject.org Cc: Link: http://lkml.kernel.org/r/1477386195-32736-6-git-send-email-borntraeger@de.ibm.com Signed-off-by: Ingo Molnar --- 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(-) (limited to 'arch/ia64') diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h index 0556fda7bc6d..31e8dbeef10b 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 6c158d576355..d102a49ad8c5 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 db660e0b4bd3..9e71c58bfa6f 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 3f9b0e54dae3..6132f64af68d 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 e412e8b68a7d..ee62365ad0da 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 8b8704a44b77..57acfb1acfe5 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 914d7308bdb4..1fd22e727e44 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 01dd52ecac84..1a578417397f 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 4d00d65f5e5e..c1e5f2a0ca31 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 683a061c3cb5..42d605369217 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 1558ddb9e5d7..5d694cccc85a 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 4654b71dc8db..0c2c3b256f6c 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 b2620370320d..9b83a13290fc 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 13e07ae6786d..b0d044224ce5 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 61d6e2722893..ee302a637f24 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 fd7dd11c730a..08ec1f725b7f 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 9a656f6afc7c..8ea95e77ec9d 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 89f63d1720ee..d11397bc9429 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 303e5932a733..d32c17669123 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 6ecfc2ab28e4..7f47fc7b7eae 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 ea2ff9febffd..a4a07f4f7c20 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 908fa7cb3fb3..5684e6872473 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 79343e37b455..9e32f25bdea3 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 e8e87b4d7971..a1e97c063ed4 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 099a99105e1c..9454ff1ad0d9 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 50e908a3c651..fc32b7311481 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 3e8fac724f18..12787dfeb11c 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 91a39a50520d..c1c228b16f7f 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 fc54d5d50419..eeefe7c529eb 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 44adadab44d6..7513c996f673 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 01597afa8888..b4bd63b22b7f 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 fe14dc2b394a..7d8d6bececfc 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. */ -- cgit v1.2.3 From 6d0d287891a022ebba572327cbd70b5de69a63a2 Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Wed, 16 Nov 2016 13:23:05 +0100 Subject: 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 Signed-off-by: Christian Borntraeger Reviewed-by: David Hildenbrand Acked-by: Russell King Cc: Andrew Morton Cc: Catalin Marinas Cc: Heiko Carstens Cc: Linus Torvalds Cc: Martin Schwidefsky Cc: Nicholas Piggin Cc: Noam Camus Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Will Deacon Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-s390 Cc: linuxppc-dev@lists.ozlabs.org Cc: sparclinux@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/1479298985-191589-1-git-send-email-borntraeger@de.ibm.com Signed-off-by: Ingo Molnar --- 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(-) (limited to 'arch/ia64') diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h index 31e8dbeef10b..2fec2dee3020 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 d102a49ad8c5..6e1242da0159 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 9e71c58bfa6f..c3d5fc124a05 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 6132f64af68d..747c65a616ed 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 ee62365ad0da..972adcc1e8f4 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 57acfb1acfe5..85d4af97c986 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 1fd22e727e44..b9eb3da7f278 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 1a578417397f..15b815df29c1 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 c1e5f2a0ca31..ddaeb9cc9143 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 42d605369217..65132d7ae9e5 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 5d694cccc85a..45a825402f63 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 0c2c3b256f6c..03911a336406 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 9b83a13290fc..5767367550c6 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 b0d044224ce5..f5f790c31bf8 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 ee302a637f24..ec6a49076980 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 08ec1f725b7f..37ef196e4519 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 8ea95e77ec9d..95b8c471f572 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 d11397bc9429..18e17abf7664 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 d32c17669123..3bbbc3d798e5 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 7f47fc7b7eae..a908e6c30a00 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 a4a07f4f7c20..ca40741378be 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 5684e6872473..dac83fcb9445 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 9e32f25bdea3..9d3a21aedc97 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 a1e97c063ed4..d9a922d8711b 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 9454ff1ad0d9..5addd69f70ef 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 fc32b7311481..365d4cb267b4 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 12787dfeb11c..6448cfc8292f 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 c1c228b16f7f..0bc9968b97a1 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 eeefe7c529eb..4eaa42167667 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 7513c996f673..c84605bb2a15 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 b4bd63b22b7f..c77db2288982 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 7d8d6bececfc..86ffcd68e496 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 348f51b0ec92..c1aa3b02f6ac 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. * -- cgit v1.2.3