From c9018aab8eee24b993c12c7aff7fc99d3d73f298 Mon Sep 17 00:00:00 2001 From: Vincent Guittot Date: Mon, 8 Aug 2011 13:21:59 +0100 Subject: ARM: 7011/1: Add ARM cpu topology definition The affinity between ARM processors is defined in the MPIDR register. We can identify which processors are in the same cluster, and which ones have performance interdependency. We can define the cpu topology of ARM platform, that is then used by sched_mc and sched_smt. The default state of sched_mc and sched_smt config is disable. When enabled, the behavior of the scheduler can be modified with sched_mc_power_savings and sched_smt_power_savings sysfs interfaces. Changes since v4 : * Remove unnecessary parentheses and blank lines Changes since v3 : * Update the format of printk message * Remove blank line Changes since v2 : * Update the commit message and some comments Changes since v1 : * Update the commit message * Add read_cpuid_mpidr in arch/arm/include/asm/cputype.h * Modify header of arch/arm/kernel/topology.c * Modify tests and manipulation of MPIDR's bitfields * Modify the place and dependancy of the config * Modify Noop functions Signed-off-by: Vincent Guittot Reviewed-by: Amit Kucheria Signed-off-by: Russell King --- arch/arm/Kconfig | 25 +++++++ arch/arm/include/asm/cputype.h | 6 ++ arch/arm/include/asm/topology.h | 33 +++++++++ arch/arm/kernel/Makefile | 1 + arch/arm/kernel/smp.c | 5 ++ arch/arm/kernel/topology.c | 148 ++++++++++++++++++++++++++++++++++++++++ 6 files changed, 218 insertions(+) create mode 100644 arch/arm/kernel/topology.c diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 3269576..c208fd9 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1393,6 +1393,31 @@ config SMP_ON_UP If you don't know what to do here, say Y. +config ARM_CPU_TOPOLOGY + bool "Support cpu topology definition" + depends on SMP && CPU_V7 + default y + help + Support ARM cpu topology definition. The MPIDR register defines + affinity between processors which is then used to describe the cpu + topology of an ARM System. + +config SCHED_MC + bool "Multi-core scheduler support" + depends on ARM_CPU_TOPOLOGY + help + Multi-core scheduler support improves the CPU scheduler's decision + making when dealing with multi-core CPU chips at a cost of slightly + increased overhead in some places. If unsure say N here. + +config SCHED_SMT + bool "SMT scheduler support" + depends on ARM_CPU_TOPOLOGY + help + Improves the CPU scheduler's decision making when dealing with + MultiThreading at a cost of slightly increased overhead in some + places. If unsure say N here. + config HAVE_ARM_SCU bool help diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h index cd4458f..cb47d28 100644 --- a/arch/arm/include/asm/cputype.h +++ b/arch/arm/include/asm/cputype.h @@ -8,6 +8,7 @@ #define CPUID_CACHETYPE 1 #define CPUID_TCM 2 #define CPUID_TLBTYPE 3 +#define CPUID_MPIDR 5 #define CPUID_EXT_PFR0 "c1, 0" #define CPUID_EXT_PFR1 "c1, 1" @@ -70,6 +71,11 @@ static inline unsigned int __attribute_const__ read_cpuid_tcmstatus(void) return read_cpuid(CPUID_TCM); } +static inline unsigned int __attribute_const__ read_cpuid_mpidr(void) +{ + return read_cpuid(CPUID_MPIDR); +} + /* * Intel's XScale3 core supports some v6 features (supersections, L2) * but advertises itself as v5 as it does not support the v6 ISA. For diff --git a/arch/arm/include/asm/topology.h b/arch/arm/include/asm/topology.h index accbd7c..a7e457e 100644 --- a/arch/arm/include/asm/topology.h +++ b/arch/arm/include/asm/topology.h @@ -1,6 +1,39 @@ #ifndef _ASM_ARM_TOPOLOGY_H #define _ASM_ARM_TOPOLOGY_H +#ifdef CONFIG_ARM_CPU_TOPOLOGY + +#include + +struct cputopo_arm { + int thread_id; + int core_id; + int socket_id; + cpumask_t thread_sibling; + cpumask_t core_sibling; +}; + +extern struct cputopo_arm cpu_topology[NR_CPUS]; + +#define topology_physical_package_id(cpu) (cpu_topology[cpu].socket_id) +#define topology_core_id(cpu) (cpu_topology[cpu].core_id) +#define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling) +#define topology_thread_cpumask(cpu) (&cpu_topology[cpu].thread_sibling) + +#define mc_capable() (cpu_topology[0].socket_id != -1) +#define smt_capable() (cpu_topology[0].thread_id != -1) + +void init_cpu_topology(void); +void store_cpu_topology(unsigned int cpuid); +const struct cpumask *cpu_coregroup_mask(unsigned int cpu); + +#else + +static inline void init_cpu_topology(void) { } +static inline void store_cpu_topology(unsigned int cpuid) { } + +#endif + #include #endif /* _ASM_ARM_TOPOLOGY_H */ diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index f7887dc..c687bce 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -66,6 +66,7 @@ obj-$(CONFIG_IWMMXT) += iwmmxt.o obj-$(CONFIG_CPU_HAS_PMU) += pmu.o obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt +obj-$(CONFIG_ARM_CPU_TOPOLOGY) += topology.o ifneq ($(CONFIG_ARCH_EBSA110),y) obj-y += io.o diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index d88ff02..62775c5c 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include #include @@ -268,6 +269,8 @@ static void __cpuinit smp_store_cpu_info(unsigned int cpuid) struct cpuinfo_arm *cpu_info = &per_cpu(cpu_data, cpuid); cpu_info->loops_per_jiffy = loops_per_jiffy; + + store_cpu_topology(cpuid); } /* @@ -358,6 +361,8 @@ void __init smp_prepare_cpus(unsigned int max_cpus) { unsigned int ncores = num_possible_cpus(); + init_cpu_topology(); + smp_store_cpu_info(smp_processor_id()); /* diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c new file mode 100644 index 0000000..1040c00 --- /dev/null +++ b/arch/arm/kernel/topology.c @@ -0,0 +1,148 @@ +/* + * arch/arm/kernel/topology.c + * + * Copyright (C) 2011 Linaro Limited. + * Written by: Vincent Guittot + * + * based on arch/sh/kernel/topology.c + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define MPIDR_SMP_BITMASK (0x3 << 30) +#define MPIDR_SMP_VALUE (0x2 << 30) + +#define MPIDR_MT_BITMASK (0x1 << 24) + +/* + * These masks reflect the current use of the affinity levels. + * The affinity level can be up to 16 bits according to ARM ARM + */ + +#define MPIDR_LEVEL0_MASK 0x3 +#define MPIDR_LEVEL0_SHIFT 0 + +#define MPIDR_LEVEL1_MASK 0xF +#define MPIDR_LEVEL1_SHIFT 8 + +#define MPIDR_LEVEL2_MASK 0xFF +#define MPIDR_LEVEL2_SHIFT 16 + +struct cputopo_arm cpu_topology[NR_CPUS]; + +const struct cpumask *cpu_coregroup_mask(unsigned int cpu) +{ + return &cpu_topology[cpu].core_sibling; +} + +/* + * store_cpu_topology is called at boot when only one cpu is running + * and with the mutex cpu_hotplug.lock locked, when several cpus have booted, + * which prevents simultaneous write access to cpu_topology array + */ +void store_cpu_topology(unsigned int cpuid) +{ + struct cputopo_arm *cpuid_topo = &cpu_topology[cpuid]; + unsigned int mpidr; + unsigned int cpu; + + /* If the cpu topology has been already set, just return */ + if (cpuid_topo->core_id != -1) + return; + + mpidr = read_cpuid_mpidr(); + + /* create cpu topology mapping */ + if ((mpidr & MPIDR_SMP_BITMASK) == MPIDR_SMP_VALUE) { + /* + * This is a multiprocessor system + * multiprocessor format & multiprocessor mode field are set + */ + + if (mpidr & MPIDR_MT_BITMASK) { + /* core performance interdependency */ + cpuid_topo->thread_id = (mpidr >> MPIDR_LEVEL0_SHIFT) + & MPIDR_LEVEL0_MASK; + cpuid_topo->core_id = (mpidr >> MPIDR_LEVEL1_SHIFT) + & MPIDR_LEVEL1_MASK; + cpuid_topo->socket_id = (mpidr >> MPIDR_LEVEL2_SHIFT) + & MPIDR_LEVEL2_MASK; + } else { + /* largely independent cores */ + cpuid_topo->thread_id = -1; + cpuid_topo->core_id = (mpidr >> MPIDR_LEVEL0_SHIFT) + & MPIDR_LEVEL0_MASK; + cpuid_topo->socket_id = (mpidr >> MPIDR_LEVEL1_SHIFT) + & MPIDR_LEVEL1_MASK; + } + } else { + /* + * This is an uniprocessor system + * we are in multiprocessor format but uniprocessor system + * or in the old uniprocessor format + */ + cpuid_topo->thread_id = -1; + cpuid_topo->core_id = 0; + cpuid_topo->socket_id = -1; + } + + /* update core and thread sibling masks */ + for_each_possible_cpu(cpu) { + struct cputopo_arm *cpu_topo = &cpu_topology[cpu]; + + if (cpuid_topo->socket_id == cpu_topo->socket_id) { + cpumask_set_cpu(cpuid, &cpu_topo->core_sibling); + if (cpu != cpuid) + cpumask_set_cpu(cpu, + &cpuid_topo->core_sibling); + + if (cpuid_topo->core_id == cpu_topo->core_id) { + cpumask_set_cpu(cpuid, + &cpu_topo->thread_sibling); + if (cpu != cpuid) + cpumask_set_cpu(cpu, + &cpuid_topo->thread_sibling); + } + } + } + smp_wmb(); + + printk(KERN_INFO "CPU%u: thread %d, cpu %d, socket %d, mpidr %x\n", + cpuid, cpu_topology[cpuid].thread_id, + cpu_topology[cpuid].core_id, + cpu_topology[cpuid].socket_id, mpidr); +} + +/* + * init_cpu_topology is called at boot when only one cpu is running + * which prevent simultaneous write access to cpu_topology array + */ +void init_cpu_topology(void) +{ + unsigned int cpu; + + /* init core mask */ + for_each_possible_cpu(cpu) { + struct cputopo_arm *cpu_topo = &(cpu_topology[cpu]); + + cpu_topo->thread_id = -1; + cpu_topo->core_id = -1; + cpu_topo->socket_id = -1; + cpumask_clear(&cpu_topo->core_sibling); + cpumask_clear(&cpu_topo->thread_sibling); + } + smp_wmb(); +} -- cgit v1.1 From d6257288c4052465feeff7e283e35ec0ed06ca03 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Tue, 23 Aug 2011 22:19:29 +0100 Subject: ARM: 7060/1: smp: populate logical CPU mapping during boot To allow booting Linux on a CPU with physical ID != 0, we need to provide a mapping from the logical CPU number to the physical CPU number. This patch adds such a mapping and populates it during boot. Signed-off-by: Will Deacon Signed-off-by: Russell King --- arch/arm/include/asm/smp.h | 6 ++++++ arch/arm/kernel/smp.c | 15 +++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h index e42d96a..674ebcd 100644 --- a/arch/arm/include/asm/smp.h +++ b/arch/arm/include/asm/smp.h @@ -66,6 +66,12 @@ extern void platform_secondary_init(unsigned int cpu); extern void platform_smp_prepare_cpus(unsigned int); /* + * Logical CPU mapping. + */ +extern int __cpu_logical_map[NR_CPUS]; +#define cpu_logical_map(cpu) __cpu_logical_map[cpu] + +/* * Initial data for bringing up a secondary CPU. */ struct secondary_data { diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 62775c5c..3f12ce9 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -40,6 +40,7 @@ #include #include #include +#include /* * as from 2.5, kernels no longer have an init_tasks structure @@ -260,6 +261,20 @@ void __ref cpu_die(void) } #endif /* CONFIG_HOTPLUG_CPU */ +int __cpu_logical_map[NR_CPUS]; + +void __init smp_setup_processor_id(void) +{ + int i; + u32 cpu = is_smp() ? read_cpuid_mpidr() & 0xff : 0; + + cpu_logical_map(0) = cpu; + for (i = 1; i < NR_CPUS; ++i) + cpu_logical_map(i) = i == cpu ? 0 : i; + + printk(KERN_INFO "Booting Linux on physical CPU %d\n", cpu); +} + /* * Called by both boot and secondaries to move global data into * per-processor storage. -- cgit v1.1 From 267840f3397fd9f6a2bdde14de38b9d29d525d7b Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Tue, 23 Aug 2011 22:20:03 +0100 Subject: ARM: 7061/1: gic: convert logical CPU numbers into physical numbers The GIC driver must convert logical CPU numbers passed in from Linux into physical CPU numbers that are understood by the hardware. This patch uses the new cpu_logical_map macro for performing the conversion inside the GIC driver. Signed-off-by: Will Deacon Signed-off-by: Russell King --- arch/arm/common/gic.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c index 3227ca9..666b278 100644 --- a/arch/arm/common/gic.c +++ b/arch/arm/common/gic.c @@ -180,7 +180,7 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val, return -EINVAL; mask = 0xff << shift; - bit = 1 << (cpu + shift); + bit = 1 << (cpu_logical_map(cpu) + shift); spin_lock(&irq_controller_lock); val = readl_relaxed(reg) & ~mask; @@ -259,9 +259,15 @@ static void __init gic_dist_init(struct gic_chip_data *gic, unsigned int irq_start) { unsigned int gic_irqs, irq_limit, i; + u32 cpumask; void __iomem *base = gic->dist_base; - u32 cpumask = 1 << smp_processor_id(); + u32 cpu = 0; +#ifdef CONFIG_SMP + cpu = cpu_logical_map(smp_processor_id()); +#endif + + cpumask = 1 << cpu; cpumask |= cpumask << 8; cpumask |= cpumask << 16; @@ -382,7 +388,12 @@ void __cpuinit gic_enable_ppi(unsigned int irq) #ifdef CONFIG_SMP void gic_raise_softirq(const struct cpumask *mask, unsigned int irq) { - unsigned long map = *cpus_addr(*mask); + int cpu; + unsigned long map = 0; + + /* Convert our logical CPU mask into a physical one. */ + for_each_cpu(cpu, mask) + map |= 1 << cpu_logical_map(cpu); /* * Ensure that stores to Normal memory are visible to the -- cgit v1.1 From 26a527e69d6e6077bff9e2cddcb08337ac33a52d Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Sun, 25 Sep 2011 08:25:43 +0100 Subject: ARM: 7100/1: smp_scu: remove __init annotation from scu_enable() When Cortex-A9 MPCore resumes from Dormant or Shutdown modes, SCU needs to be re-enabled. This patch removes __init annotation from function scu_enable(), so that platform resume procedure can call it to re-enable SCU. Signed-off-by: Shawn Guo Signed-off-by: Russell King --- arch/arm/kernel/smp_scu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/kernel/smp_scu.c b/arch/arm/kernel/smp_scu.c index 79ed5e7..5b6d536 100644 --- a/arch/arm/kernel/smp_scu.c +++ b/arch/arm/kernel/smp_scu.c @@ -33,7 +33,7 @@ unsigned int __init scu_get_core_count(void __iomem *scu_base) /* * Enable the SCU */ -void __init scu_enable(void __iomem *scu_base) +void scu_enable(void __iomem *scu_base) { u32 scu_ctrl; -- cgit v1.1 From 0b5a1b95dcdfa451125132d5ce3f79a27ffb0950 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Thu, 6 Oct 2011 15:18:14 +0100 Subject: ARM: 7123/1: smp: Add an IPI handler callable from C code In order to be able to handle IPI directly from C code instead of assembly code, introduce handle_IPI(), which is modeled after handle_IRQ(). Signed-off-by: Marc Zyngier Signed-off-by: Russell King --- arch/arm/include/asm/smp.h | 5 +++++ arch/arm/kernel/smp.c | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h index 674ebcd..0a17b62 100644 --- a/arch/arm/include/asm/smp.h +++ b/arch/arm/include/asm/smp.h @@ -33,6 +33,11 @@ extern void show_ipi_list(struct seq_file *, int); asmlinkage void do_IPI(int ipinr, struct pt_regs *regs); /* + * Called from C code, this handles an IPI. + */ +void handle_IPI(int ipinr, struct pt_regs *regs); + +/* * Setup the set of possible CPUs (via set_cpu_possible) */ extern void smp_init_cpus(void); diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 3f12ce9..2e49f18 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -587,6 +587,11 @@ static void ipi_cpu_stop(unsigned int cpu) */ asmlinkage void __exception_irq_entry do_IPI(int ipinr, struct pt_regs *regs) { + handle_IPI(ipinr, regs); +} + +void handle_IPI(int ipinr, struct pt_regs *regs) +{ unsigned int cpu = smp_processor_id(); struct pt_regs *old_regs = set_irq_regs(regs); -- cgit v1.1 From 0af8aa0069e43f90d59666510342c05e97d8c4b8 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Thu, 6 Oct 2011 15:19:14 +0100 Subject: ARM: 7124/1: smp: Add a localtimer handler callable from C code In order to be able to handle localtimer directly from C code instead of assembly code, introduce handle_local_timer(), which is modeled after handle_IRQ(). Signed-off-by: Shawn Guo Signed-off-by: Russell King --- arch/arm/include/asm/localtimer.h | 4 ++++ arch/arm/kernel/smp.c | 5 +++++ 2 files changed, 9 insertions(+) diff --git a/arch/arm/include/asm/localtimer.h b/arch/arm/include/asm/localtimer.h index 080d74f..3306f28 100644 --- a/arch/arm/include/asm/localtimer.h +++ b/arch/arm/include/asm/localtimer.h @@ -22,6 +22,10 @@ void percpu_timer_setup(void); */ asmlinkage void do_local_timer(struct pt_regs *); +/* + * Called from C code + */ +void handle_local_timer(struct pt_regs *); #ifdef CONFIG_LOCAL_TIMERS diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 2e49f18..0949007 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -480,6 +480,11 @@ static void ipi_timer(void) #ifdef CONFIG_LOCAL_TIMERS asmlinkage void __exception_irq_entry do_local_timer(struct pt_regs *regs) { + handle_local_timer(regs); +} + +void handle_local_timer(struct pt_regs *regs) +{ struct pt_regs *old_regs = set_irq_regs(regs); int cpu = smp_processor_id(); -- cgit v1.1 From 5a567d78c437e3be1c512734cdfe64b4ae6b82d7 Mon Sep 17 00:00:00 2001 From: Jamie Iles Date: Sat, 8 Oct 2011 11:20:42 +0100 Subject: ARM: 7115/4: move __exception and friends to asm/exception.h The definition of __exception_irq_entry for CONFIG_FUNCTION_GRAPH_TRACER=y needs linux/ftrace.h, but this creates a circular dependency with it's current home in asm/system.h. Create asm/exception.h and update all current users. v4: - rebase to rmk/for-next v3: - remove redundant includes of linux/ftrace.h v2: - document the usage restricitions of __exception* Cc: Zoltan Devai Signed-off-by: Jamie Iles Signed-off-by: Russell King --- arch/arm/include/asm/exception.h | 19 +++++++++++++++++++ arch/arm/include/asm/system.h | 7 ------- arch/arm/kernel/irq.c | 2 +- arch/arm/kernel/smp.c | 2 +- arch/arm/kernel/traps.c | 1 + arch/arm/mach-pxa/irq.c | 2 ++ arch/arm/mm/fault.c | 1 + 7 files changed, 25 insertions(+), 9 deletions(-) create mode 100644 arch/arm/include/asm/exception.h diff --git a/arch/arm/include/asm/exception.h b/arch/arm/include/asm/exception.h new file mode 100644 index 0000000..5abaf5b --- /dev/null +++ b/arch/arm/include/asm/exception.h @@ -0,0 +1,19 @@ +/* + * Annotations for marking C functions as exception handlers. + * + * These should only be used for C functions that are called from the low + * level exception entry code and not any intervening C code. + */ +#ifndef __ASM_ARM_EXCEPTION_H +#define __ASM_ARM_EXCEPTION_H + +#include + +#define __exception __attribute__((section(".exception.text"))) +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +#define __exception_irq_entry __irq_entry +#else +#define __exception_irq_entry __exception +#endif + +#endif /* __ASM_ARM_EXCEPTION_H */ diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h index 832888d..ed6b049 100644 --- a/arch/arm/include/asm/system.h +++ b/arch/arm/include/asm/system.h @@ -62,13 +62,6 @@ #include -#define __exception __attribute__((section(".exception.text"))) -#ifdef CONFIG_FUNCTION_GRAPH_TRACER -#define __exception_irq_entry __irq_entry -#else -#define __exception_irq_entry __exception -#endif - struct thread_info; struct task_struct; diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c index de3dcab8..53919b2 100644 --- a/arch/arm/kernel/irq.c +++ b/arch/arm/kernel/irq.c @@ -35,8 +35,8 @@ #include #include #include -#include +#include #include #include #include diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 0949007..35417d0 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -16,7 +16,6 @@ #include #include #include -#include #include #include #include @@ -31,6 +30,7 @@ #include #include #include +#include #include #include #include diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index bc9f9da..2103825 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -27,6 +27,7 @@ #include #include +#include #include #include #include diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c index b09e848..ca60757 100644 --- a/arch/arm/mach-pxa/irq.c +++ b/arch/arm/mach-pxa/irq.c @@ -19,6 +19,8 @@ #include #include +#include + #include #include #include diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index 3b5ea68..aa33949 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -20,6 +20,7 @@ #include #include +#include #include #include #include -- cgit v1.1