diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/ia64/include/asm/acpi.h | 2 | ||||
| -rw-r--r-- | arch/x86/include/asm/acpi.h | 2 | ||||
| -rw-r--r-- | arch/x86/mm/tlb.c | 17 |
3 files changed, 18 insertions, 3 deletions
diff --git a/arch/ia64/include/asm/acpi.h b/arch/ia64/include/asm/acpi.h index c86a947f5368..a3d0211970e9 100644 --- a/arch/ia64/include/asm/acpi.h +++ b/arch/ia64/include/asm/acpi.h @@ -112,6 +112,8 @@ static inline void arch_acpi_set_pdc_bits(u32 *buf) buf[2] |= ACPI_PDC_EST_CAPABILITY_SMP; } +#define acpi_unlazy_tlb(x) + #ifdef CONFIG_ACPI_NUMA extern cpumask_t early_cpu_possible_map; #define for_each_possible_early_cpu(cpu) \ diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h index 72d867f6b518..8d0ec9df1cbe 100644 --- a/arch/x86/include/asm/acpi.h +++ b/arch/x86/include/asm/acpi.h @@ -150,6 +150,8 @@ static inline void disable_acpi(void) { } extern int x86_acpi_numa_init(void); #endif /* CONFIG_ACPI_NUMA */ +#define acpi_unlazy_tlb(x) leave_mm(x) + #ifdef CONFIG_ACPI_APEI static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr) { diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index 0f3d0cea4d00..3118392cdf75 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -85,6 +85,7 @@ void leave_mm(int cpu) switch_mm(NULL, &init_mm, NULL); } +EXPORT_SYMBOL_GPL(leave_mm); void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) @@ -195,12 +196,22 @@ void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct *next, this_cpu_write(cpu_tlbstate.ctxs[new_asid].ctx_id, next->context.ctx_id); this_cpu_write(cpu_tlbstate.ctxs[new_asid].tlb_gen, next_tlb_gen); write_cr3(build_cr3(next, new_asid)); - trace_tlb_flush(TLB_FLUSH_ON_TASK_SWITCH, - TLB_FLUSH_ALL); + + /* + * NB: This gets called via leave_mm() in the idle path + * where RCU functions differently. Tracing normally + * uses RCU, so we need to use the _rcuidle variant. + * + * (There is no good reason for this. The idle code should + * be rearranged to call this before rcu_idle_enter().) + */ + trace_tlb_flush_rcuidle(TLB_FLUSH_ON_TASK_SWITCH, TLB_FLUSH_ALL); } else { /* The new ASID is already up to date. */ write_cr3(build_cr3_noflush(next, new_asid)); - trace_tlb_flush(TLB_FLUSH_ON_TASK_SWITCH, 0); + + /* See above wrt _rcuidle. */ + trace_tlb_flush_rcuidle(TLB_FLUSH_ON_TASK_SWITCH, 0); } this_cpu_write(cpu_tlbstate.loaded_mm, next); |