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-rw-r--r--arch/arm/kernel/Makefile3
-rw-r--r--arch/arm/kernel/arch_timer.c350
-rw-r--r--arch/arm/kernel/bios32.c37
-rw-r--r--arch/arm/kernel/entry-armv.S5
-rw-r--r--arch/arm/kernel/entry-common.S36
-rw-r--r--arch/arm/kernel/head.S9
-rw-r--r--arch/arm/kernel/init_task.c37
-rw-r--r--arch/arm/kernel/kprobes-test-arm.c4
-rw-r--r--arch/arm/kernel/kprobes-thumb.c2
-rw-r--r--arch/arm/kernel/perf_event.c2
-rw-r--r--arch/arm/kernel/perf_event_v6.c4
-rw-r--r--arch/arm/kernel/perf_event_v7.c4
-rw-r--r--arch/arm/kernel/perf_event_xscale.c8
-rw-r--r--arch/arm/kernel/process.c20
-rw-r--r--arch/arm/kernel/ptrace.c21
-rw-r--r--arch/arm/kernel/setup.c17
-rw-r--r--arch/arm/kernel/signal.c87
-rw-r--r--arch/arm/kernel/smp.c37
-rw-r--r--arch/arm/kernel/smp_scu.c3
-rw-r--r--arch/arm/kernel/sys_oabi-compat.c4
-rw-r--r--arch/arm/kernel/thumbee.c4
-rw-r--r--arch/arm/kernel/time.c36
-rw-r--r--arch/arm/kernel/traps.c11
-rw-r--r--arch/arm/kernel/vmlinux.lds.S2
24 files changed, 481 insertions, 262 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 7b787d642af..7ad2d5cf700 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_ARM_CPU_SUSPEND) += sleep.o suspend.o
obj-$(CONFIG_SMP) += smp.o smp_tlb.o
obj-$(CONFIG_HAVE_ARM_SCU) += smp_scu.o
obj-$(CONFIG_HAVE_ARM_TWD) += smp_twd.o
+obj-$(CONFIG_ARM_ARCH_TIMER) += arch_timer.o
obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o insn.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o insn.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o insn.o patch.o
@@ -81,4 +82,4 @@ head-y := head$(MMUEXT).o
obj-$(CONFIG_DEBUG_LL) += debug.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
-extra-y := $(head-y) init_task.o vmlinux.lds
+extra-y := $(head-y) vmlinux.lds
diff --git a/arch/arm/kernel/arch_timer.c b/arch/arm/kernel/arch_timer.c
new file mode 100644
index 00000000000..dd58035621f
--- /dev/null
+++ b/arch/arm/kernel/arch_timer.c
@@ -0,0 +1,350 @@
+/*
+ * linux/arch/arm/kernel/arch_timer.c
+ *
+ * Copyright (C) 2011 ARM Ltd.
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/smp.h>
+#include <linux/cpu.h>
+#include <linux/jiffies.h>
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/of_irq.h>
+#include <linux/io.h>
+
+#include <asm/cputype.h>
+#include <asm/localtimer.h>
+#include <asm/arch_timer.h>
+#include <asm/system_info.h>
+#include <asm/sched_clock.h>
+
+static unsigned long arch_timer_rate;
+static int arch_timer_ppi;
+static int arch_timer_ppi2;
+
+static struct clock_event_device __percpu **arch_timer_evt;
+
+/*
+ * Architected system timer support.
+ */
+
+#define ARCH_TIMER_CTRL_ENABLE (1 << 0)
+#define ARCH_TIMER_CTRL_IT_MASK (1 << 1)
+#define ARCH_TIMER_CTRL_IT_STAT (1 << 2)
+
+#define ARCH_TIMER_REG_CTRL 0
+#define ARCH_TIMER_REG_FREQ 1
+#define ARCH_TIMER_REG_TVAL 2
+
+static void arch_timer_reg_write(int reg, u32 val)
+{
+ switch (reg) {
+ case ARCH_TIMER_REG_CTRL:
+ asm volatile("mcr p15, 0, %0, c14, c2, 1" : : "r" (val));
+ break;
+ case ARCH_TIMER_REG_TVAL:
+ asm volatile("mcr p15, 0, %0, c14, c2, 0" : : "r" (val));
+ break;
+ }
+
+ isb();
+}
+
+static u32 arch_timer_reg_read(int reg)
+{
+ u32 val;
+
+ switch (reg) {
+ case ARCH_TIMER_REG_CTRL:
+ asm volatile("mrc p15, 0, %0, c14, c2, 1" : "=r" (val));
+ break;
+ case ARCH_TIMER_REG_FREQ:
+ asm volatile("mrc p15, 0, %0, c14, c0, 0" : "=r" (val));
+ break;
+ case ARCH_TIMER_REG_TVAL:
+ asm volatile("mrc p15, 0, %0, c14, c2, 0" : "=r" (val));
+ break;
+ default:
+ BUG();
+ }
+
+ return val;
+}
+
+static irqreturn_t arch_timer_handler(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = *(struct clock_event_device **)dev_id;
+ unsigned long ctrl;
+
+ ctrl = arch_timer_reg_read(ARCH_TIMER_REG_CTRL);
+ if (ctrl & ARCH_TIMER_CTRL_IT_STAT) {
+ ctrl |= ARCH_TIMER_CTRL_IT_MASK;
+ arch_timer_reg_write(ARCH_TIMER_REG_CTRL, ctrl);
+ evt->event_handler(evt);
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+static void arch_timer_disable(void)
+{
+ unsigned long ctrl;
+
+ ctrl = arch_timer_reg_read(ARCH_TIMER_REG_CTRL);
+ ctrl &= ~ARCH_TIMER_CTRL_ENABLE;
+ arch_timer_reg_write(ARCH_TIMER_REG_CTRL, ctrl);
+}
+
+static void arch_timer_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *clk)
+{
+ switch (mode) {
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ arch_timer_disable();
+ break;
+ default:
+ break;
+ }
+}
+
+static int arch_timer_set_next_event(unsigned long evt,
+ struct clock_event_device *unused)
+{
+ unsigned long ctrl;
+
+ ctrl = arch_timer_reg_read(ARCH_TIMER_REG_CTRL);
+ ctrl |= ARCH_TIMER_CTRL_ENABLE;
+ ctrl &= ~ARCH_TIMER_CTRL_IT_MASK;
+
+ arch_timer_reg_write(ARCH_TIMER_REG_TVAL, evt);
+ arch_timer_reg_write(ARCH_TIMER_REG_CTRL, ctrl);
+
+ return 0;
+}
+
+static int __cpuinit arch_timer_setup(struct clock_event_device *clk)
+{
+ /* Be safe... */
+ arch_timer_disable();
+
+ clk->features = CLOCK_EVT_FEAT_ONESHOT;
+ clk->name = "arch_sys_timer";
+ clk->rating = 450;
+ clk->set_mode = arch_timer_set_mode;
+ clk->set_next_event = arch_timer_set_next_event;
+ clk->irq = arch_timer_ppi;
+
+ clockevents_config_and_register(clk, arch_timer_rate,
+ 0xf, 0x7fffffff);
+
+ *__this_cpu_ptr(arch_timer_evt) = clk;
+
+ enable_percpu_irq(clk->irq, 0);
+ if (arch_timer_ppi2)
+ enable_percpu_irq(arch_timer_ppi2, 0);
+
+ return 0;
+}
+
+/* Is the optional system timer available? */
+static int local_timer_is_architected(void)
+{
+ return (cpu_architecture() >= CPU_ARCH_ARMv7) &&
+ ((read_cpuid_ext(CPUID_EXT_PFR1) >> 16) & 0xf) == 1;
+}
+
+static int arch_timer_available(void)
+{
+ unsigned long freq;
+
+ if (!local_timer_is_architected())
+ return -ENXIO;
+
+ if (arch_timer_rate == 0) {
+ arch_timer_reg_write(ARCH_TIMER_REG_CTRL, 0);
+ freq = arch_timer_reg_read(ARCH_TIMER_REG_FREQ);
+
+ /* Check the timer frequency. */
+ if (freq == 0) {
+ pr_warn("Architected timer frequency not available\n");
+ return -EINVAL;
+ }
+
+ arch_timer_rate = freq;
+ }
+
+ pr_info_once("Architected local timer running at %lu.%02luMHz.\n",
+ arch_timer_rate / 1000000, (arch_timer_rate / 10000) % 100);
+ return 0;
+}
+
+static inline cycle_t arch_counter_get_cntpct(void)
+{
+ u32 cvall, cvalh;
+
+ asm volatile("mrrc p15, 0, %0, %1, c14" : "=r" (cvall), "=r" (cvalh));
+
+ return ((cycle_t) cvalh << 32) | cvall;
+}
+
+static inline cycle_t arch_counter_get_cntvct(void)
+{
+ u32 cvall, cvalh;
+
+ asm volatile("mrrc p15, 1, %0, %1, c14" : "=r" (cvall), "=r" (cvalh));
+
+ return ((cycle_t) cvalh << 32) | cvall;
+}
+
+static u32 notrace arch_counter_get_cntvct32(void)
+{
+ cycle_t cntvct = arch_counter_get_cntvct();
+
+ /*
+ * The sched_clock infrastructure only knows about counters
+ * with at most 32bits. Forget about the upper 24 bits for the
+ * time being...
+ */
+ return (u32)(cntvct & (u32)~0);
+}
+
+static cycle_t arch_counter_read(struct clocksource *cs)
+{
+ return arch_counter_get_cntpct();
+}
+
+static struct clocksource clocksource_counter = {
+ .name = "arch_sys_counter",
+ .rating = 400,
+ .read = arch_counter_read,
+ .mask = CLOCKSOURCE_MASK(56),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static void __cpuinit arch_timer_stop(struct clock_event_device *clk)
+{
+ pr_debug("arch_timer_teardown disable IRQ%d cpu #%d\n",
+ clk->irq, smp_processor_id());
+ disable_percpu_irq(clk->irq);
+ if (arch_timer_ppi2)
+ disable_percpu_irq(arch_timer_ppi2);
+ arch_timer_set_mode(CLOCK_EVT_MODE_UNUSED, clk);
+}
+
+static struct local_timer_ops arch_timer_ops __cpuinitdata = {
+ .setup = arch_timer_setup,
+ .stop = arch_timer_stop,
+};
+
+static struct clock_event_device arch_timer_global_evt;
+
+static int __init arch_timer_register(void)
+{
+ int err;
+
+ err = arch_timer_available();
+ if (err)
+ return err;
+
+ arch_timer_evt = alloc_percpu(struct clock_event_device *);
+ if (!arch_timer_evt)
+ return -ENOMEM;
+
+ clocksource_register_hz(&clocksource_counter, arch_timer_rate);
+
+ err = request_percpu_irq(arch_timer_ppi, arch_timer_handler,
+ "arch_timer", arch_timer_evt);
+ if (err) {
+ pr_err("arch_timer: can't register interrupt %d (%d)\n",
+ arch_timer_ppi, err);
+ goto out_free;
+ }
+
+ if (arch_timer_ppi2) {
+ err = request_percpu_irq(arch_timer_ppi2, arch_timer_handler,
+ "arch_timer", arch_timer_evt);
+ if (err) {
+ pr_err("arch_timer: can't register interrupt %d (%d)\n",
+ arch_timer_ppi2, err);
+ arch_timer_ppi2 = 0;
+ goto out_free_irq;
+ }
+ }
+
+ err = local_timer_register(&arch_timer_ops);
+ if (err) {
+ /*
+ * We couldn't register as a local timer (could be
+ * because we're on a UP platform, or because some
+ * other local timer is already present...). Try as a
+ * global timer instead.
+ */
+ arch_timer_global_evt.cpumask = cpumask_of(0);
+ err = arch_timer_setup(&arch_timer_global_evt);
+ }
+
+ if (err)
+ goto out_free_irq;
+
+ return 0;
+
+out_free_irq:
+ free_percpu_irq(arch_timer_ppi, arch_timer_evt);
+ if (arch_timer_ppi2)
+ free_percpu_irq(arch_timer_ppi2, arch_timer_evt);
+
+out_free:
+ free_percpu(arch_timer_evt);
+
+ return err;
+}
+
+static const struct of_device_id arch_timer_of_match[] __initconst = {
+ { .compatible = "arm,armv7-timer", },
+ {},
+};
+
+int __init arch_timer_of_register(void)
+{
+ struct device_node *np;
+ u32 freq;
+
+ np = of_find_matching_node(NULL, arch_timer_of_match);
+ if (!np) {
+ pr_err("arch_timer: can't find DT node\n");
+ return -ENODEV;
+ }
+
+ /* Try to determine the frequency from the device tree or CNTFRQ */
+ if (!of_property_read_u32(np, "clock-frequency", &freq))
+ arch_timer_rate = freq;
+
+ arch_timer_ppi = irq_of_parse_and_map(np, 0);
+ arch_timer_ppi2 = irq_of_parse_and_map(np, 1);
+ pr_info("arch_timer: found %s irqs %d %d\n",
+ np->name, arch_timer_ppi, arch_timer_ppi2);
+
+ return arch_timer_register();
+}
+
+int __init arch_timer_sched_clock_init(void)
+{
+ int err;
+
+ err = arch_timer_available();
+ if (err)
+ return err;
+
+ setup_sched_clock(arch_counter_get_cntvct32, 32, arch_timer_rate);
+ return 0;
+}
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index ede5f7741c4..25552508c3f 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -374,16 +374,29 @@ EXPORT_SYMBOL(pcibios_fixup_bus);
#endif
/*
- * Swizzle the device pin each time we cross a bridge.
- * This might update pin and returns the slot number.
+ * Swizzle the device pin each time we cross a bridge. If a platform does
+ * not provide a swizzle function, we perform the standard PCI swizzling.
+ *
+ * The default swizzling walks up the bus tree one level at a time, applying
+ * the standard swizzle function at each step, stopping when it finds the PCI
+ * root bus. This will return the slot number of the bridge device on the
+ * root bus and the interrupt pin on that device which should correspond
+ * with the downstream device interrupt.
+ *
+ * Platforms may override this, in which case the slot and pin returned
+ * depend entirely on the platform code. However, please note that the
+ * PCI standard swizzle is implemented on plug-in cards and Cardbus based
+ * PCI extenders, so it can not be ignored.
*/
static u8 __devinit pcibios_swizzle(struct pci_dev *dev, u8 *pin)
{
struct pci_sys_data *sys = dev->sysdata;
- int slot = 0, oldpin = *pin;
+ int slot, oldpin = *pin;
if (sys->swizzle)
slot = sys->swizzle(dev, pin);
+ else
+ slot = pci_common_swizzle(dev, pin);
if (debug_pci)
printk("PCI: %s swizzling pin %d => pin %d slot %d\n",
@@ -410,7 +423,7 @@ static int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
return irq;
}
-static void __init pcibios_init_hw(struct hw_pci *hw)
+static void __init pcibios_init_hw(struct hw_pci *hw, struct list_head *head)
{
struct pci_sys_data *sys = NULL;
int ret;
@@ -424,7 +437,6 @@ static void __init pcibios_init_hw(struct hw_pci *hw)
#ifdef CONFIG_PCI_DOMAINS
sys->domain = hw->domain;
#endif
- sys->hw = hw;
sys->busnr = busnr;
sys->swizzle = hw->swizzle;
sys->map_irq = hw->map_irq;
@@ -440,14 +452,18 @@ static void __init pcibios_init_hw(struct hw_pci *hw)
&iomem_resource, sys->mem_offset);
}
- sys->bus = hw->scan(nr, sys);
+ if (hw->scan)
+ sys->bus = hw->scan(nr, sys);
+ else
+ sys->bus = pci_scan_root_bus(NULL, sys->busnr,
+ hw->ops, sys, &sys->resources);
if (!sys->bus)
panic("PCI: unable to scan bus!");
busnr = sys->bus->subordinate + 1;
- list_add(&sys->node, &hw->buses);
+ list_add(&sys->node, head);
} else {
kfree(sys);
if (ret < 0)
@@ -459,19 +475,18 @@ static void __init pcibios_init_hw(struct hw_pci *hw)
void __init pci_common_init(struct hw_pci *hw)
{
struct pci_sys_data *sys;
-
- INIT_LIST_HEAD(&hw->buses);
+ LIST_HEAD(head);
pci_add_flags(PCI_REASSIGN_ALL_RSRC);
if (hw->preinit)
hw->preinit();
- pcibios_init_hw(hw);
+ pcibios_init_hw(hw, &head);
if (hw->postinit)
hw->postinit();
pci_fixup_irqs(pcibios_swizzle, pcibios_map_irq);
- list_for_each_entry(sys, &hw->buses, node) {
+ list_for_each_entry(sys, &head, node) {
struct pci_bus *bus = sys->bus;
if (!pci_has_flag(PCI_PROBE_ONLY)) {
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 7fd3ad048da..0d1851ca6eb 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -495,6 +495,7 @@ ENDPROC(__und_usr)
* The out of line fixup for the ldrt above.
*/
.pushsection .fixup, "ax"
+ .align 2
4: mov pc, r9
.popsection
.pushsection __ex_table,"a"
@@ -556,10 +557,6 @@ call_fpe:
#endif
tst r0, #0x08000000 @ only CDP/CPRT/LDC/STC have bit 27
tstne r0, #0x04000000 @ bit 26 set on both ARM and Thumb-2
-#if defined(CONFIG_CPU_ARM610) || defined(CONFIG_CPU_ARM710)
- and r8, r0, #0x0f000000 @ mask out op-code bits
- teqne r8, #0x0f000000 @ SWI (ARM6/7 bug)?
-#endif
moveq pc, lr
get_thread_info r10 @ get current thread
and r8, r0, #0x00000f00 @ mask out CP number
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 54ee265dd81..4afed88d250 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -53,9 +53,13 @@ fast_work_pending:
work_pending:
tst r1, #_TIF_NEED_RESCHED
bne work_resched
- tst r1, #_TIF_SIGPENDING|_TIF_NOTIFY_RESUME
- beq no_work_pending
+ /*
+ * TIF_SIGPENDING or TIF_NOTIFY_RESUME must've been set if we got here
+ */
+ ldr r2, [sp, #S_PSR]
mov r0, sp @ 'regs'
+ tst r2, #15 @ are we returning to user mode?
+ bne no_work_pending @ no? just leave, then...
mov r2, why @ 'syscall'
tst r1, #_TIF_SIGPENDING @ delivering a signal?
movne why, #0 @ prevent further restarts
@@ -335,20 +339,6 @@ ENDPROC(ftrace_stub)
*-----------------------------------------------------------------------------
*/
- /* If we're optimising for StrongARM the resulting code won't
- run on an ARM7 and we can save a couple of instructions.
- --pb */
-#ifdef CONFIG_CPU_ARM710
-#define A710(code...) code
-.Larm710bug:
- ldmia sp, {r0 - lr}^ @ Get calling r0 - lr
- mov r0, r0
- add sp, sp, #S_FRAME_SIZE
- subs pc, lr, #4
-#else
-#define A710(code...)
-#endif
-
.align 5
ENTRY(vector_swi)
sub sp, sp, #S_FRAME_SIZE
@@ -379,9 +369,6 @@ ENTRY(vector_swi)
ldreq r10, [lr, #-4] @ get SWI instruction
#else
ldr r10, [lr, #-4] @ get SWI instruction
- A710( and ip, r10, #0x0f000000 @ check for SWI )
- A710( teq ip, #0x0f000000 )
- A710( bne .Larm710bug )
#endif
#ifdef CONFIG_CPU_ENDIAN_BE8
rev r10, r10 @ little endian instruction
@@ -392,26 +379,15 @@ ENTRY(vector_swi)
/*
* Pure EABI user space always put syscall number into scno (r7).
*/
- A710( ldr ip, [lr, #-4] @ get SWI instruction )
- A710( and ip, ip, #0x0f000000 @ check for SWI )
- A710( teq ip, #0x0f000000 )
- A710( bne .Larm710bug )
-
#elif defined(CONFIG_ARM_THUMB)
-
/* Legacy ABI only, possibly thumb mode. */
tst r8, #PSR_T_BIT @ this is SPSR from save_user_regs
addne scno, r7, #__NR_SYSCALL_BASE @ put OS number in
ldreq scno, [lr, #-4]
#else
-
/* Legacy ABI only. */
ldr scno, [lr, #-4] @ get SWI instruction
- A710( and ip, scno, #0x0f000000 @ check for SWI )
- A710( teq ip, #0x0f000000 )
- A710( bne .Larm710bug )
-
#endif
#ifdef CONFIG_ALIGNMENT_TRAP
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 3bf0c7f8b04..835898e7d70 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -277,10 +277,6 @@ __create_page_tables:
mov r3, r3, lsl #PMD_ORDER
add r0, r4, r3
- rsb r3, r3, #0x4000 @ PTRS_PER_PGD*sizeof(long)
- cmp r3, #0x0800 @ limit to 512MB
- movhi r3, #0x0800
- add r6, r0, r3
mov r3, r7, lsr #SECTION_SHIFT
ldr r7, [r10, #PROCINFO_IO_MMUFLAGS] @ io_mmuflags
orr r3, r7, r3, lsl #SECTION_SHIFT
@@ -289,13 +285,10 @@ __create_page_tables:
#else
orr r3, r3, #PMD_SECT_XN
#endif
-1: str r3, [r0], #4
+ str r3, [r0], #4
#ifdef CONFIG_ARM_LPAE
str r7, [r0], #4
#endif
- add r3, r3, #1 << SECTION_SHIFT
- cmp r0, r6
- blo 1b
#else /* CONFIG_DEBUG_ICEDCC || CONFIG_DEBUG_SEMIHOSTING */
/* we don't need any serial debugging mappings */
diff --git a/arch/arm/kernel/init_task.c b/arch/arm/kernel/init_task.c
deleted file mode 100644
index e7cbb50dc35..00000000000
--- a/arch/arm/kernel/init_task.c
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * linux/arch/arm/kernel/init_task.c
- */
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/init_task.h>
-#include <linux/mqueue.h>
-#include <linux/uaccess.h>
-
-#include <asm/pgtable.h>
-
-static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
-static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
-/*
- * Initial thread structure.
- *
- * We need to make sure that this is 8192-byte aligned due to the
- * way process stacks are handled. This is done by making sure
- * the linker maps this in the .text segment right after head.S,
- * and making head.S ensure the proper alignment.
- *
- * The things we do for performance..
- */
-union thread_union init_thread_union __init_task_data =
- { INIT_THREAD_INFO(init_task) };
-
-/*
- * Initial task structure.
- *
- * All other task structs will be allocated on slabs in fork.c
- */
-struct task_struct init_task = INIT_TASK(init_task);
-
-EXPORT_SYMBOL(init_task);
diff --git a/arch/arm/kernel/kprobes-test-arm.c b/arch/arm/kernel/kprobes-test-arm.c
index ba32b393b3f..38c1a3b103a 100644
--- a/arch/arm/kernel/kprobes-test-arm.c
+++ b/arch/arm/kernel/kprobes-test-arm.c
@@ -187,8 +187,8 @@ void kprobe_arm_test_cases(void)
TEST_BF_R ("mov pc, r",0,2f,"")
TEST_BF_RR("mov pc, r",0,2f,", asl r",1,0,"")
TEST_BB( "sub pc, pc, #1b-2b+8")
-#if __LINUX_ARM_ARCH__ >= 6
- TEST_BB( "sub pc, pc, #1b-2b+8-2") /* UNPREDICTABLE before ARMv6 */
+#if __LINUX_ARM_ARCH__ == 6 && !defined(CONFIG_CPU_V7)
+ TEST_BB( "sub pc, pc, #1b-2b+8-2") /* UNPREDICTABLE before and after ARMv6 */
#endif
TEST_BB_R( "sub pc, pc, r",14, 1f-2f+8,"")
TEST_BB_R( "rsb pc, r",14,1f-2f+8,", pc")
diff --git a/arch/arm/kernel/kprobes-thumb.c b/arch/arm/kernel/kprobes-thumb.c
index 8f96ec778e8..6123daf397a 100644
--- a/arch/arm/kernel/kprobes-thumb.c
+++ b/arch/arm/kernel/kprobes-thumb.c
@@ -660,7 +660,7 @@ static const union decode_item t32_table_1111_100x[] = {
/* LDRSB (literal) 1111 1001 x001 1111 xxxx xxxx xxxx xxxx */
/* LDRH (literal) 1111 1000 x011 1111 xxxx xxxx xxxx xxxx */
/* LDRSH (literal) 1111 1001 x011 1111 xxxx xxxx xxxx xxxx */
- DECODE_EMULATEX (0xfe5f0000, 0xf81f0000, t32_simulate_ldr_literal,
+ DECODE_SIMULATEX(0xfe5f0000, 0xf81f0000, t32_simulate_ldr_literal,
REGS(PC, NOSPPCX, 0, 0, 0)),
/* STRB (immediate) 1111 1000 0000 xxxx xxxx 1xxx xxxx xxxx */
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 186c8cb982c..a02eada3aa5 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -503,7 +503,7 @@ __hw_perf_event_init(struct perf_event *event)
event_requires_mode_exclusion(&event->attr)) {
pr_debug("ARM performance counters do not support "
"mode exclusion\n");
- return -EPERM;
+ return -EOPNOTSUPP;
}
/*
diff --git a/arch/arm/kernel/perf_event_v6.c b/arch/arm/kernel/perf_event_v6.c
index b78af0cc6ef..ab627a740fa 100644
--- a/arch/arm/kernel/perf_event_v6.c
+++ b/arch/arm/kernel/perf_event_v6.c
@@ -489,8 +489,6 @@ armv6pmu_handle_irq(int irq_num,
*/
armv6_pmcr_write(pmcr);
- perf_sample_data_init(&data, 0);
-
cpuc = &__get_cpu_var(cpu_hw_events);
for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
struct perf_event *event = cpuc->events[idx];
@@ -509,7 +507,7 @@ armv6pmu_handle_irq(int irq_num,
hwc = &event->hw;
armpmu_event_update(event, hwc, idx);
- data.period = event->hw.last_period;
+ perf_sample_data_init(&data, 0, hwc->last_period);
if (!armpmu_event_set_period(event, hwc, idx))
continue;
diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c
index 00755d82e2f..d3c53606816 100644
--- a/arch/arm/kernel/perf_event_v7.c
+++ b/arch/arm/kernel/perf_event_v7.c
@@ -1077,8 +1077,6 @@ static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
*/
regs = get_irq_regs();
- perf_sample_data_init(&data, 0);
-
cpuc = &__get_cpu_var(cpu_hw_events);
for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
struct perf_event *event = cpuc->events[idx];
@@ -1097,7 +1095,7 @@ static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
hwc = &event->hw;
armpmu_event_update(event, hwc, idx);
- data.period = event->hw.last_period;
+ perf_sample_data_init(&data, 0, hwc->last_period);
if (!armpmu_event_set_period(event, hwc, idx))
continue;
diff --git a/arch/arm/kernel/perf_event_xscale.c b/arch/arm/kernel/perf_event_xscale.c
index 71a21e6712f..e34e7254e65 100644
--- a/arch/arm/kernel/perf_event_xscale.c
+++ b/arch/arm/kernel/perf_event_xscale.c
@@ -248,8 +248,6 @@ xscale1pmu_handle_irq(int irq_num, void *dev)
regs = get_irq_regs();
- perf_sample_data_init(&data, 0);
-
cpuc = &__get_cpu_var(cpu_hw_events);
for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
struct perf_event *event = cpuc->events[idx];
@@ -263,7 +261,7 @@ xscale1pmu_handle_irq(int irq_num, void *dev)
hwc = &event->hw;
armpmu_event_update(event, hwc, idx);
- data.period = event->hw.last_period;
+ perf_sample_data_init(&data, 0, hwc->last_period);
if (!armpmu_event_set_period(event, hwc, idx))
continue;
@@ -588,8 +586,6 @@ xscale2pmu_handle_irq(int irq_num, void *dev)
regs = get_irq_regs();
- perf_sample_data_init(&data, 0);
-
cpuc = &__get_cpu_var(cpu_hw_events);
for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
struct perf_event *event = cpuc->events[idx];
@@ -603,7 +599,7 @@ xscale2pmu_handle_irq(int irq_num, void *dev)
hwc = &event->hw;
armpmu_event_update(event, hwc, idx);
- data.period = event->hw.last_period;
+ perf_sample_data_init(&data, 0, hwc->last_period);
if (!armpmu_event_set_period(event, hwc, idx))
continue;
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 2b7b017a20c..19c95ea65b2 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -157,26 +157,6 @@ EXPORT_SYMBOL(pm_power_off);
void (*arm_pm_restart)(char str, const char *cmd) = null_restart;
EXPORT_SYMBOL_GPL(arm_pm_restart);
-static void do_nothing(void *unused)
-{
-}
-
-/*
- * cpu_idle_wait - Used to ensure that all the CPUs discard old value of
- * pm_idle and update to new pm_idle value. Required while changing pm_idle
- * handler on SMP systems.
- *
- * Caller must have changed pm_idle to the new value before the call. Old
- * pm_idle value will not be used by any CPU after the return of this function.
- */
-void cpu_idle_wait(void)
-{
- smp_mb();
- /* kick all the CPUs so that they exit out of pm_idle */
- smp_call_function(do_nothing, NULL, 1);
-}
-EXPORT_SYMBOL_GPL(cpu_idle_wait);
-
/*
* This is our default idle handler.
*/
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 9650c143afc..14e38261cd3 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -24,6 +24,7 @@
#include <linux/hw_breakpoint.h>
#include <linux/regset.h>
#include <linux/audit.h>
+#include <linux/tracehook.h>
#include <asm/pgtable.h>
#include <asm/traps.h>
@@ -918,8 +919,6 @@ asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno)
if (!test_thread_flag(TIF_SYSCALL_TRACE))
return scno;
- if (!(current->ptrace & PT_PTRACED))
- return scno;
current_thread_info()->syscall = scno;
@@ -930,19 +929,11 @@ asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno)
ip = regs->ARM_ip;
regs->ARM_ip = why;
- /* the 0x80 provides a way for the tracing parent to distinguish
- between a syscall stop and SIGTRAP delivery */
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
- ? 0x80 : 0));
- /*
- * this isn't the same as continuing with a signal, but it will do
- * for normal use. strace only continues with a signal if the
- * stopping signal is not SIGTRAP. -brl
- */
- if (current->exit_code) {
- send_sig(current->exit_code, current, 1);
- current->exit_code = 0;
- }
+ if (why)
+ tracehook_report_syscall_exit(regs, 0);
+ else if (tracehook_report_syscall_entry(regs))
+ current_thread_info()->syscall = -1;
+
regs->ARM_ip = ip;
return current_thread_info()->syscall;
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index ebfac782593..e15d83bb4ea 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -81,6 +81,7 @@ __setup("fpe=", fpe_setup);
extern void paging_init(struct machine_desc *desc);
extern void sanity_check_meminfo(void);
extern void reboot_setup(char *str);
+extern void setup_dma_zone(struct machine_desc *desc);
unsigned int processor_id;
EXPORT_SYMBOL(processor_id);
@@ -800,6 +801,14 @@ static int __init customize_machine(void)
}
arch_initcall(customize_machine);
+static int __init init_machine_late(void)
+{
+ if (machine_desc->init_late)
+ machine_desc->init_late();
+ return 0;
+}
+late_initcall(init_machine_late);
+
#ifdef CONFIG_KEXEC
static inline unsigned long long get_total_mem(void)
{
@@ -939,12 +948,8 @@ void __init setup_arch(char **cmdline_p)
machine_desc = mdesc;
machine_name = mdesc->name;
-#ifdef CONFIG_ZONE_DMA
- if (mdesc->dma_zone_size) {
- extern unsigned long arm_dma_zone_size;
- arm_dma_zone_size = mdesc->dma_zone_size;
- }
-#endif
+ setup_dma_zone(mdesc);
+
if (mdesc->restart_mode)
reboot_setup(&mdesc->restart_mode);
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index d68d1b69468..536c5d6b340 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -22,8 +22,6 @@
#include "signal.h"
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
/*
* For ARM syscalls, we encode the syscall number into the instruction.
*/
@@ -67,17 +65,8 @@ const unsigned long syscall_restart_code[2] = {
asmlinkage int sys_sigsuspend(int restart, unsigned long oldmask, old_sigset_t mask)
{
sigset_t blocked;
-
- current->saved_sigmask = current->blocked;
-
- mask &= _BLOCKABLE;
siginitset(&blocked, mask);
- set_current_blocked(&blocked);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_restore_sigmask();
- return -ERESTARTNOHAND;
+ return sigsuspend(&blocked);
}
asmlinkage int
@@ -91,10 +80,10 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
- __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
+ __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+ __get_user(mask, &act->sa_mask))
return -EFAULT;
- __get_user(new_ka.sa.sa_flags, &act->sa_flags);
- __get_user(mask, &act->sa_mask);
siginitset(&new_ka.sa.sa_mask, mask);
}
@@ -103,10 +92,10 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
- __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
+ __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+ __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
- __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
- __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
}
return ret;
@@ -232,10 +221,8 @@ static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf)
int err;
err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
- if (err == 0) {
- sigdelsetmask(&set, ~_BLOCKABLE);
+ if (err == 0)
set_current_blocked(&set);
- }
__get_user_error(regs->ARM_r0, &sf->uc.uc_mcontext.arm_r0, err);
__get_user_error(regs->ARM_r1, &sf->uc.uc_mcontext.arm_r1, err);
@@ -550,13 +537,13 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
/*
* OK, we're invoking a handler
*/
-static int
+static void
handle_signal(unsigned long sig, struct k_sigaction *ka,
- siginfo_t *info, sigset_t *oldset,
- struct pt_regs * regs)
+ siginfo_t *info, struct pt_regs *regs)
{
struct thread_info *thread = current_thread_info();
struct task_struct *tsk = current;
+ sigset_t *oldset = sigmask_to_save();
int usig = sig;
int ret;
@@ -581,15 +568,9 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
if (ret != 0) {
force_sigsegv(sig, tsk);
- return ret;
+ return;
}
-
- /*
- * Block the signal if we were successful.
- */
- block_sigmask(ka, sig);
-
- return 0;
+ signal_delivered(sig, info, ka, regs, 0);
}
/*
@@ -609,15 +590,6 @@ static void do_signal(struct pt_regs *regs, int syscall)
int signr;
/*
- * We want the common case to go fast, which
- * is why we may in certain cases get here from
- * kernel mode. Just return without doing anything
- * if so.
- */
- if (!user_mode(regs))
- return;
-
- /*
* If we were from a system call, check for system call restarting...
*/
if (syscall) {
@@ -642,17 +614,12 @@ static void do_signal(struct pt_regs *regs, int syscall)
}
}
- if (try_to_freeze())
- goto no_signal;
-
/*
* Get the signal to deliver. When running under ptrace, at this
* point the debugger may change all our registers ...
*/
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
- sigset_t *oldset;
-
/*
* Depending on the signal settings we may need to revert the
* decision to restart the system call. But skip this if a
@@ -667,24 +634,10 @@ static void do_signal(struct pt_regs *regs, int syscall)
}
}
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
- oldset = &current->saved_sigmask;
- else
- oldset = &current->blocked;
- if (handle_signal(signr, &ka, &info, oldset, regs) == 0) {
- /*
- * A signal was successfully delivered; the saved
- * sigmask will have been stored in the signal frame,
- * and will be restored by sigreturn, so we can simply
- * clear the TIF_RESTORE_SIGMASK flag.
- */
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
- clear_thread_flag(TIF_RESTORE_SIGMASK);
- }
+ handle_signal(signr, &ka, &info, regs);
return;
}
- no_signal:
if (syscall) {
/*
* Handle restarting a different system call. As above,
@@ -715,15 +668,9 @@ static void do_signal(struct pt_regs *regs, int syscall)
#endif
}
}
-
- /* If there's no signal to deliver, we just put the saved sigmask
- * back.
- */
- if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
- clear_thread_flag(TIF_RESTORE_SIGMASK);
- sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
- }
}
+
+ restore_saved_sigmask();
}
asmlinkage void
@@ -735,7 +682,5 @@ do_notify_resume(struct pt_regs *regs, unsigned int thread_flags, int syscall)
if (thread_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
- if (current->replacement_session_keyring)
- key_replace_session_keyring();
}
}
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 8f464465977..2c7217d971d 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -60,32 +60,11 @@ enum ipi_msg_type {
static DECLARE_COMPLETION(cpu_running);
-int __cpuinit __cpu_up(unsigned int cpu)
+int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
{
- struct cpuinfo_arm *ci = &per_cpu(cpu_data, cpu);
- struct task_struct *idle = ci->idle;
int ret;
/*
- * Spawn a new process manually, if not already done.
- * Grab a pointer to its task struct so we can mess with it
- */
- if (!idle) {
- idle = fork_idle(cpu);
- if (IS_ERR(idle)) {
- printk(KERN_ERR "CPU%u: fork() failed\n", cpu);
- return PTR_ERR(idle);
- }
- ci->idle = idle;
- } else {
- /*
- * Since this idle thread is being re-used, call
- * init_idle() to reinitialize the thread structure.
- */
- init_idle(idle, cpu);
- }
-
- /*
* We need to tell the secondary core where to find
* its stack and the page tables.
*/
@@ -130,7 +109,6 @@ static void percpu_timer_stop(void);
int __cpu_disable(void)
{
unsigned int cpu = smp_processor_id();
- struct task_struct *p;
int ret;
ret = platform_cpu_disable(cpu);
@@ -160,12 +138,7 @@ int __cpu_disable(void)
flush_cache_all();
local_flush_tlb_all();
- read_lock(&tasklist_lock);
- for_each_process(p) {
- if (p->mm)
- cpumask_clear_cpu(cpu, mm_cpumask(p->mm));
- }
- read_unlock(&tasklist_lock);
+ clear_tasks_mm_cpumask(cpu);
return 0;
}
@@ -318,9 +291,6 @@ void __init smp_cpus_done(unsigned int max_cpus)
void __init smp_prepare_boot_cpu(void)
{
- unsigned int cpu = smp_processor_id();
-
- per_cpu(cpu_data, cpu).idle = current;
}
void __init smp_prepare_cpus(unsigned int max_cpus)
@@ -454,6 +424,9 @@ static struct local_timer_ops *lt_ops;
#ifdef CONFIG_LOCAL_TIMERS
int local_timer_register(struct local_timer_ops *ops)
{
+ if (!is_smp() || !setup_max_cpus)
+ return -ENXIO;
+
if (lt_ops)
return -EBUSY;
diff --git a/arch/arm/kernel/smp_scu.c b/arch/arm/kernel/smp_scu.c
index 8f5dd796335..b9f015e843d 100644
--- a/arch/arm/kernel/smp_scu.c
+++ b/arch/arm/kernel/smp_scu.c
@@ -11,6 +11,7 @@
#include <linux/init.h>
#include <linux/io.h>
+#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
#include <asm/cacheflush.h>
#include <asm/cputype.h>
@@ -74,7 +75,7 @@ void scu_enable(void __iomem *scu_base)
int scu_power_mode(void __iomem *scu_base, unsigned int mode)
{
unsigned int val;
- int cpu = smp_processor_id();
+ int cpu = cpu_logical_map(smp_processor_id());
if (mode > 3 || mode == 1 || cpu > 3)
return -EINVAL;
diff --git a/arch/arm/kernel/sys_oabi-compat.c b/arch/arm/kernel/sys_oabi-compat.c
index af0aaebf4de..3e94811690c 100644
--- a/arch/arm/kernel/sys_oabi-compat.c
+++ b/arch/arm/kernel/sys_oabi-compat.c
@@ -124,8 +124,8 @@ static long cp_oldabi_stat64(struct kstat *stat,
tmp.__st_ino = stat->ino;
tmp.st_mode = stat->mode;
tmp.st_nlink = stat->nlink;
- tmp.st_uid = stat->uid;
- tmp.st_gid = stat->gid;
+ tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
+ tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
tmp.st_rdev = huge_encode_dev(stat->rdev);
tmp.st_size = stat->size;
tmp.st_blocks = stat->blocks;
diff --git a/arch/arm/kernel/thumbee.c b/arch/arm/kernel/thumbee.c
index aab89976405..7b8403b7666 100644
--- a/arch/arm/kernel/thumbee.c
+++ b/arch/arm/kernel/thumbee.c
@@ -20,6 +20,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
+#include <asm/cputype.h>
#include <asm/system_info.h>
#include <asm/thread_notify.h>
@@ -67,8 +68,7 @@ static int __init thumbee_init(void)
if (cpu_arch < CPU_ARCH_ARMv7)
return 0;
- /* processor feature register 0 */
- asm("mrc p15, 0, %0, c0, c1, 0\n" : "=r" (pfr0));
+ pfr0 = read_cpuid_ext(CPUID_EXT_PFR0);
if ((pfr0 & 0x0000f000) != 0x00001000)
return 0;
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index fe31b22f18f..af2afb01967 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -110,6 +110,42 @@ void timer_tick(void)
}
#endif
+static void dummy_clock_access(struct timespec *ts)
+{
+ ts->tv_sec = 0;
+ ts->tv_nsec = 0;
+}
+
+static clock_access_fn __read_persistent_clock = dummy_clock_access;
+static clock_access_fn __read_boot_clock = dummy_clock_access;;
+
+void read_persistent_clock(struct timespec *ts)
+{
+ __read_persistent_clock(ts);
+}
+
+void read_boot_clock(struct timespec *ts)
+{
+ __read_boot_clock(ts);
+}
+
+int __init register_persistent_clock(clock_access_fn read_boot,
+ clock_access_fn read_persistent)
+{
+ /* Only allow the clockaccess functions to be registered once */
+ if (__read_persistent_clock == dummy_clock_access &&
+ __read_boot_clock == dummy_clock_access) {
+ if (read_boot)
+ __read_boot_clock = read_boot;
+ if (read_persistent)
+ __read_persistent_clock = read_persistent;
+
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
#if defined(CONFIG_PM) && !defined(CONFIG_GENERIC_CLOCKEVENTS)
static int timer_suspend(void)
{
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 63d402f75e2..3647170e9a1 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -479,14 +479,14 @@ static int bad_syscall(int n, struct pt_regs *regs)
return regs->ARM_r0;
}
-static inline void
+static inline int
do_cache_op(unsigned long start, unsigned long end, int flags)
{
struct mm_struct *mm = current->active_mm;
struct vm_area_struct *vma;
if (end < start || flags)
- return;
+ return -EINVAL;
down_read(&mm->mmap_sem);
vma = find_vma(mm, start);
@@ -497,10 +497,10 @@ do_cache_op(unsigned long start, unsigned long end, int flags)
end = vma->vm_end;
up_read(&mm->mmap_sem);
- flush_cache_user_range(start, end);
- return;
+ return flush_cache_user_range(start, end);
}
up_read(&mm->mmap_sem);
+ return -EINVAL;
}
/*
@@ -546,8 +546,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
* the specified region).
*/
case NR(cacheflush):
- do_cache_op(regs->ARM_r0, regs->ARM_r1, regs->ARM_r2);
- return 0;
+ return do_cache_op(regs->ARM_r0, regs->ARM_r1, regs->ARM_r2);
case NR(usr26):
if (!(elf_hwcap & HWCAP_26BIT))
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 43a31fb0631..36ff15bbfdd 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -183,7 +183,9 @@ SECTIONS
}
#endif
+#ifdef CONFIG_SMP
PERCPU_SECTION(L1_CACHE_BYTES)
+#endif
#ifdef CONFIG_XIP_KERNEL
__data_loc = ALIGN(4); /* location in binary */