diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/Kconfig | 25 | ||||
| -rw-r--r-- | arch/s390/include/asm/ctl_reg.h | 9 | ||||
| -rw-r--r-- | arch/s390/include/asm/percpu.h | 2 | ||||
| -rw-r--r-- | arch/s390/include/asm/smp.h | 30 | ||||
| -rw-r--r-- | arch/s390/include/asm/spinlock.h | 4 | ||||
| -rw-r--r-- | arch/s390/include/asm/tlbflush.h | 17 | ||||
| -rw-r--r-- | arch/s390/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/dumpstack.c | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/entry.S | 4 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/swsusp.S | 2 | ||||
| -rw-r--r-- | arch/s390/lib/Makefile | 3 |
12 files changed, 7 insertions, 95 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index e2e154051b07..bdf3b5fdea53 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -30,7 +30,7 @@ config GENERIC_BUG_RELATIVE_POINTERS def_bool y config GENERIC_LOCKBREAK - def_bool y if SMP && PREEMPT + def_bool y if PREEMPT config PGSTE def_bool y if KVM @@ -113,7 +113,6 @@ config S390 select DYNAMIC_FTRACE if FUNCTION_TRACER select GENERIC_CLOCKEVENTS select GENERIC_CPU_AUTOPROBE - select GENERIC_CPU_DEVICES if !SMP select GENERIC_CPU_VULNERABILITIES select GENERIC_FIND_FIRST_BIT select GENERIC_SMP_IDLE_THREAD @@ -399,27 +398,10 @@ config SYSVIPC_COMPAT config SMP def_bool y - prompt "Symmetric multi-processing support" - ---help--- - This enables support for systems with more than one CPU. If you have - a system with only one CPU, like most personal computers, say N. If - you have a system with more than one CPU, say Y. - - If you say N here, the kernel will run on uni- and multiprocessor - machines, but will use only one CPU of a multiprocessor machine. If - you say Y here, the kernel will run on many, but not all, - uniprocessor machines. On a uniprocessor machine, the kernel - will run faster if you say N here. - - See also the SMP-HOWTO available at - <http://www.tldp.org/docs.html#howto>. - - Even if you don't know what to do here, say Y. config NR_CPUS int "Maximum number of CPUs (2-512)" range 2 512 - depends on SMP default "64" help This allows you to specify the maximum number of CPUs which this @@ -432,7 +414,6 @@ config NR_CPUS config HOTPLUG_CPU def_bool y prompt "Support for hot-pluggable CPUs" - depends on SMP help Say Y here to be able to turn CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu/cpu#. @@ -448,7 +429,7 @@ config NODES_SPAN_OTHER_NODES config NUMA bool "NUMA support" - depends on SMP && SCHED_TOPOLOGY + depends on SCHED_TOPOLOGY default n help Enable NUMA support @@ -523,7 +504,6 @@ config SCHED_DRAWER config SCHED_TOPOLOGY def_bool y prompt "Topology scheduler support" - depends on SMP select SCHED_SMT select SCHED_MC select SCHED_BOOK @@ -829,7 +809,6 @@ menu "Dump support" config CRASH_DUMP bool "kernel crash dumps" - depends on SMP select KEXEC help Generate crash dump after being started by kexec. diff --git a/arch/s390/include/asm/ctl_reg.h b/arch/s390/include/asm/ctl_reg.h index 4600453536c2..a778a0825835 100644 --- a/arch/s390/include/asm/ctl_reg.h +++ b/arch/s390/include/asm/ctl_reg.h @@ -112,13 +112,8 @@ union ctlreg2 { }; }; -#ifdef CONFIG_SMP -# define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit) -# define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit) -#else -# define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit) -# define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit) -#endif +#define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit) +#define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit) #endif /* __ASSEMBLY__ */ #endif /* __ASM_CTL_REG_H */ diff --git a/arch/s390/include/asm/percpu.h b/arch/s390/include/asm/percpu.h index 0095ddb58ff6..50b4ce8cddfd 100644 --- a/arch/s390/include/asm/percpu.h +++ b/arch/s390/include/asm/percpu.h @@ -16,7 +16,7 @@ * per cpu area, use weak definitions to force the compiler to * generate external references. */ -#if defined(CONFIG_SMP) && defined(MODULE) +#if defined(MODULE) #define ARCH_NEEDS_WEAK_PER_CPU #endif diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h index 3907ead27ffa..30ba1a3f88de 100644 --- a/arch/s390/include/asm/smp.h +++ b/arch/s390/include/asm/smp.h @@ -9,9 +9,6 @@ #define __ASM_SMP_H #include <asm/sigp.h> - -#ifdef CONFIG_SMP - #include <asm/lowcore.h> #define raw_smp_processor_id() (S390_lowcore.cpu_nr) @@ -40,33 +37,6 @@ extern int smp_cpu_get_polarization(int cpu); extern void smp_fill_possible_mask(void); extern void smp_detect_cpus(void); -#else /* CONFIG_SMP */ - -#define smp_cpu_mtid 0 - -static inline void smp_call_ipl_cpu(void (*func)(void *), void *data) -{ - func(data); -} - -static inline void smp_call_online_cpu(void (*func)(void *), void *data) -{ - func(data); -} - -static inline void smp_emergency_stop(void) -{ -} - -static inline int smp_find_processor_id(u16 address) { return 0; } -static inline int smp_store_status(int cpu) { return 0; } -static inline int smp_vcpu_scheduled(int cpu) { return 1; } -static inline void smp_yield_cpu(int cpu) { } -static inline void smp_fill_possible_mask(void) { } -static inline void smp_detect_cpus(void) { } - -#endif /* CONFIG_SMP */ - static inline void smp_stop_cpu(void) { u16 pcpu = stap(); diff --git a/arch/s390/include/asm/spinlock.h b/arch/s390/include/asm/spinlock.h index 0a29588aa00b..c02bff33f6c7 100644 --- a/arch/s390/include/asm/spinlock.h +++ b/arch/s390/include/asm/spinlock.h @@ -20,11 +20,7 @@ extern int spin_retry; -#ifndef CONFIG_SMP -static inline bool arch_vcpu_is_preempted(int cpu) { return false; } -#else bool arch_vcpu_is_preempted(int cpu); -#endif #define vcpu_is_preempted arch_vcpu_is_preempted diff --git a/arch/s390/include/asm/tlbflush.h b/arch/s390/include/asm/tlbflush.h index 8c840f0904f3..82703e03f35d 100644 --- a/arch/s390/include/asm/tlbflush.h +++ b/arch/s390/include/asm/tlbflush.h @@ -32,7 +32,6 @@ static inline void __tlb_flush_idte(unsigned long asce) : : "a" (opt), "a" (asce) : "cc"); } -#ifdef CONFIG_SMP void smp_ptlb_all(void); /* @@ -83,22 +82,6 @@ static inline void __tlb_flush_kernel(void) else __tlb_flush_global(); } -#else -#define __tlb_flush_global() __tlb_flush_local() - -/* - * Flush TLB entries for a specific ASCE on all CPUs. - */ -static inline void __tlb_flush_mm(struct mm_struct *mm) -{ - __tlb_flush_local(); -} - -static inline void __tlb_flush_kernel(void) -{ - __tlb_flush_local(); -} -#endif static inline void __tlb_flush_mm_lazy(struct mm_struct * mm) { diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index b0478d01a0c5..0f255b54b051 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -53,6 +53,7 @@ obj-y += sysinfo.o lgr.o os_info.o machine_kexec.o pgm_check.o obj-y += runtime_instr.o cache.o fpu.o dumpstack.o guarded_storage.o sthyi.o obj-y += entry.o reipl.o relocate_kernel.o kdebugfs.o alternative.o obj-y += nospec-branch.o ipl_vmparm.o machine_kexec_reloc.o unwind_bc.o +obj-y += smp.o extra-y += head64.o vmlinux.lds @@ -60,7 +61,6 @@ obj-$(CONFIG_SYSFS) += nospec-sysfs.o CFLAGS_REMOVE_nospec-branch.o += $(CC_FLAGS_EXPOLINE) obj-$(CONFIG_MODULES) += module.o -obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_SCHED_TOPOLOGY) += topology.o obj-$(CONFIG_HIBERNATION) += suspend.o swsusp.o obj-$(CONFIG_AUDIT) += audit.o diff --git a/arch/s390/kernel/dumpstack.c b/arch/s390/kernel/dumpstack.c index 9e87b68be21c..ac06c3949ab3 100644 --- a/arch/s390/kernel/dumpstack.c +++ b/arch/s390/kernel/dumpstack.c @@ -199,9 +199,7 @@ void die(struct pt_regs *regs, const char *str) #ifdef CONFIG_PREEMPT pr_cont("PREEMPT "); #endif -#ifdef CONFIG_SMP pr_cont("SMP "); -#endif if (debug_pagealloc_enabled()) pr_cont("DEBUG_PAGEALLOC"); pr_cont("\n"); diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 3f4d272577d3..270d1d145761 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -986,14 +986,12 @@ ENTRY(psw_idle) stg %r3,__SF_EMPTY(%r15) larl %r1,.Lpsw_idle_lpsw+4 stg %r1,__SF_EMPTY+8(%r15) -#ifdef CONFIG_SMP larl %r1,smp_cpu_mtid llgf %r1,0(%r1) ltgr %r1,%r1 jz .Lpsw_idle_stcctm .insn rsy,0xeb0000000017,%r1,5,__SF_EMPTY+16(%r15) .Lpsw_idle_stcctm: -#endif oi __LC_CPU_FLAGS+7,_CIF_ENABLED_WAIT BPON STCK __CLOCK_IDLE_ENTER(%r2) @@ -1468,7 +1466,6 @@ ENDPROC(cleanup_critical) mvc __CLOCK_IDLE_ENTER(8,%r2),__CLOCK_IDLE_EXIT(%r2) mvc __TIMER_IDLE_ENTER(8,%r2),__TIMER_IDLE_EXIT(%r2) 1: # calculate idle cycles -#ifdef CONFIG_SMP clg %r9,BASED(.Lcleanup_idle_insn) jl 3f larl %r1,smp_cpu_mtid @@ -1486,7 +1483,6 @@ ENDPROC(cleanup_critical) la %r3,8(%r3) la %r4,8(%r4) brct %r1,2b -#endif 3: # account system time going idle lg %r9,__LC_STEAL_TIMER alg %r9,__CLOCK_IDLE_ENTER(%r2) diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index f8544d517430..2b94b0ad3588 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -461,11 +461,9 @@ static void __init setup_lowcore_dat_off(void) mem_assign_absolute(S390_lowcore.restart_source, lc->restart_source); mem_assign_absolute(S390_lowcore.restart_psw, lc->restart_psw); -#ifdef CONFIG_SMP lc->spinlock_lockval = arch_spin_lockval(0); lc->spinlock_index = 0; arch_spin_lock_setup(0); -#endif lc->br_r1_trampoline = 0x07f1; /* br %r1 */ set_prefix((u32)(unsigned long) lc); diff --git a/arch/s390/kernel/swsusp.S b/arch/s390/kernel/swsusp.S index 19a3c427801a..a7baf0b5f818 100644 --- a/arch/s390/kernel/swsusp.S +++ b/arch/s390/kernel/swsusp.S @@ -162,7 +162,6 @@ ENTRY(swsusp_arch_resume) larl %r1,__swsusp_reset_dma lg %r1,0(%r1) BASR_EX %r14,%r1 -#ifdef CONFIG_SMP larl %r1,smp_cpu_mt_shift icm %r1,15,0(%r1) jz smt_done @@ -172,7 +171,6 @@ smt_loop: brc 8,smt_done /* accepted */ brc 2,smt_loop /* busy, try again */ smt_done: -#endif larl %r1,.Lnew_pgm_check_psw lpswe 0(%r1) pgm_check_entry: diff --git a/arch/s390/lib/Makefile b/arch/s390/lib/Makefile index 5418d10dc2a8..a1ec63abfb95 100644 --- a/arch/s390/lib/Makefile +++ b/arch/s390/lib/Makefile @@ -3,9 +3,8 @@ # Makefile for s390-specific library files.. # -lib-y += delay.o string.o uaccess.o find.o +lib-y += delay.o string.o uaccess.o find.o spinlock.o obj-y += mem.o xor.o -lib-$(CONFIG_SMP) += spinlock.o lib-$(CONFIG_KPROBES) += probes.o lib-$(CONFIG_UPROBES) += probes.o |