diff options
125 files changed, 881 insertions, 1787 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 3ea332b009e..ad89a33d8c6 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -39,3 +39,6 @@ config HAVE_KRETPROBES config HAVE_DMA_ATTRS def_bool n + +config USE_GENERIC_SMP_HELPERS + def_bool n diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 729cdbdf803..dbe8c280fea 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -528,6 +528,7 @@ config ARCH_MAY_HAVE_PC_FDC config SMP bool "Symmetric multi-processing support" depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL + select USE_GENERIC_SMP_HELPERS ---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 diff --git a/arch/alpha/kernel/core_marvel.c b/arch/alpha/kernel/core_marvel.c index b04f1feb1dd..04dcc5e5d4c 100644 --- a/arch/alpha/kernel/core_marvel.c +++ b/arch/alpha/kernel/core_marvel.c @@ -660,9 +660,9 @@ __marvel_rtc_io(u8 b, unsigned long addr, int write) #ifdef CONFIG_SMP if (smp_processor_id() != boot_cpuid) - smp_call_function_on_cpu(__marvel_access_rtc, - &rtc_access, 1, 1, - cpumask_of_cpu(boot_cpuid)); + smp_call_function_single(boot_cpuid, + __marvel_access_rtc, + &rtc_access, 1); else __marvel_access_rtc(&rtc_access); #else diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c index 96ed82fd9ee..351407e07e7 100644 --- a/arch/alpha/kernel/process.c +++ b/arch/alpha/kernel/process.c @@ -160,7 +160,7 @@ common_shutdown(int mode, char *restart_cmd) struct halt_info args; args.mode = mode; args.restart_cmd = restart_cmd; - on_each_cpu(common_shutdown_1, &args, 1, 0); + on_each_cpu(common_shutdown_1, &args, 0); } void diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c index 2525692db0a..83df541650f 100644 --- a/arch/alpha/kernel/smp.c +++ b/arch/alpha/kernel/smp.c @@ -62,6 +62,7 @@ static struct { enum ipi_message_type { IPI_RESCHEDULE, IPI_CALL_FUNC, + IPI_CALL_FUNC_SINGLE, IPI_CPU_STOP, }; @@ -558,51 +559,6 @@ send_ipi_message(cpumask_t to_whom, enum ipi_message_type operation) wripir(i); } -/* Structure and data for smp_call_function. This is designed to - minimize static memory requirements. Plus it looks cleaner. */ - -struct smp_call_struct { - void (*func) (void *info); - void *info; - long wait; - atomic_t unstarted_count; - atomic_t unfinished_count; -}; - -static struct smp_call_struct *smp_call_function_data; - -/* Atomicly drop data into a shared pointer. The pointer is free if - it is initially locked. If retry, spin until free. */ - -static int -pointer_lock (void *lock, void *data, int retry) -{ - void *old, *tmp; - - mb(); - again: - /* Compare and swap with zero. */ - asm volatile ( - "1: ldq_l %0,%1\n" - " mov %3,%2\n" - " bne %0,2f\n" - " stq_c %2,%1\n" - " beq %2,1b\n" - "2:" - : "=&r"(old), "=m"(*(void **)lock), "=&r"(tmp) - : "r"(data) - : "memory"); - - if (old == 0) - return 0; - if (! retry) - return -EBUSY; - - while (*(void **)lock) - barrier(); - goto again; -} - void handle_ipi(struct pt_regs *regs) { @@ -632,31 +588,12 @@ handle_ipi(struct pt_regs *regs) break; case IPI_CALL_FUNC: - { - struct smp_call_struct *data; - void (*func)(void *info); - void *info; - int wait; - - data = smp_call_function_data; - func = data->func; - info = data->info; - wait = data->wait; - - /* Notify the sending CPU that the data has been - received, and execution is about to begin. */ - mb(); - atomic_dec (&data->unstarted_count); - - /* At this point the structure may be gone unless - wait is true. */ - (*func)(info); - - /* Notify the sending CPU that the task is done. */ - mb(); - if (wait) atomic_dec (&data->unfinished_count); + generic_smp_call_function_interrupt(); + break; + + case IPI_CALL_FUNC_SINGLE: + generic_smp_call_function_single_interrupt(); break; - } case IPI_CPU_STOP: halt(); @@ -700,102 +637,15 @@ smp_send_stop(void) send_ipi_message(to_whom, IPI_CPU_STOP); } -/* - * Run a function on all other CPUs. - * <func> The function t |