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-rw-r--r--arch/arm/kernel/dma.c14
-rw-r--r--arch/arm/kernel/machine_kexec.c36
-rw-r--r--arch/arm/kernel/ptrace.c1
-rw-r--r--arch/arm/kernel/setup.c2
-rw-r--r--arch/arm/kernel/swp_emulate.c16
-rw-r--r--arch/arm/kernel/traps.c10
6 files changed, 38 insertions, 41 deletions
diff --git a/arch/arm/kernel/dma.c b/arch/arm/kernel/dma.c
index e651c4d0a0d9..6739d37c2bc5 100644
--- a/arch/arm/kernel/dma.c
+++ b/arch/arm/kernel/dma.c
@@ -276,21 +276,9 @@ static int proc_dma_show(struct seq_file *m, void *v)
return 0;
}
-static int proc_dma_open(struct inode *inode, struct file *file)
-{
- return single_open(file, proc_dma_show, NULL);
-}
-
-static const struct file_operations proc_dma_operations = {
- .open = proc_dma_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static int __init proc_dma_init(void)
{
- proc_create("dma", 0, NULL, &proc_dma_operations);
+ proc_create_single("dma", 0, NULL, proc_dma_show);
return 0;
}
diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
index 6b38d7a634c1..dd2eb5f76b9f 100644
--- a/arch/arm/kernel/machine_kexec.c
+++ b/arch/arm/kernel/machine_kexec.c
@@ -83,7 +83,7 @@ void machine_crash_nonpanic_core(void *unused)
{
struct pt_regs regs;
- crash_setup_regs(&regs, NULL);
+ crash_setup_regs(&regs, get_irq_regs());
printk(KERN_DEBUG "CPU %u will stop doing anything useful since another CPU has crashed\n",
smp_processor_id());
crash_save_cpu(&regs, smp_processor_id());
@@ -95,6 +95,27 @@ void machine_crash_nonpanic_core(void *unused)
cpu_relax();
}
+void crash_smp_send_stop(void)
+{
+ static int cpus_stopped;
+ unsigned long msecs;
+
+ if (cpus_stopped)
+ return;
+
+ atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
+ smp_call_function(machine_crash_nonpanic_core, NULL, false);
+ msecs = 1000; /* Wait at most a second for the other cpus to stop */
+ while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) {
+ mdelay(1);
+ msecs--;
+ }
+ if (atomic_read(&waiting_for_crash_ipi) > 0)
+ pr_warn("Non-crashing CPUs did not react to IPI\n");
+
+ cpus_stopped = 1;
+}
+
static void machine_kexec_mask_interrupts(void)
{
unsigned int i;
@@ -120,19 +141,8 @@ static void machine_kexec_mask_interrupts(void)
void machine_crash_shutdown(struct pt_regs *regs)
{
- unsigned long msecs;
-
local_irq_disable();
-
- atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
- smp_call_function(machine_crash_nonpanic_core, NULL, false);
- msecs = 1000; /* Wait at most a second for the other cpus to stop */
- while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) {
- mdelay(1);
- msecs--;
- }
- if (atomic_read(&waiting_for_crash_ipi) > 0)
- pr_warn("Non-crashing CPUs did not react to IPI\n");
+ crash_smp_send_stop();
crash_save_cpu(regs, smp_processor_id());
machine_kexec_mask_interrupts();
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 7724b0f661b3..36718a424358 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -205,6 +205,7 @@ void ptrace_break(struct task_struct *tsk, struct pt_regs *regs)
{
siginfo_t info;
+ clear_siginfo(&info);
info.si_signo = SIGTRAP;
info.si_errno = 0;
info.si_code = TRAP_BRKPT;
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index fc40a2b40595..35ca494c028c 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -754,7 +754,7 @@ int __init arm_add_memory(u64 start, u64 size)
else
size -= aligned_start - start;
-#ifndef CONFIG_ARCH_PHYS_ADDR_T_64BIT
+#ifndef CONFIG_PHYS_ADDR_T_64BIT
if (aligned_start > ULONG_MAX) {
pr_crit("Ignoring memory at 0x%08llx outside 32-bit physical address space\n",
(long long)start);
diff --git a/arch/arm/kernel/swp_emulate.c b/arch/arm/kernel/swp_emulate.c
index 3bda08bee674..80517f293eb9 100644
--- a/arch/arm/kernel/swp_emulate.c
+++ b/arch/arm/kernel/swp_emulate.c
@@ -91,18 +91,6 @@ static int proc_status_show(struct seq_file *m, void *v)
seq_printf(m, "Last process:\t\t%d\n", previous_pid);
return 0;
}
-
-static int proc_status_open(struct inode *inode, struct file *file)
-{
- return single_open(file, proc_status_show, PDE_DATA(inode));
-}
-
-static const struct file_operations proc_status_fops = {
- .open = proc_status_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
#endif
/*
@@ -112,6 +100,7 @@ static void set_segfault(struct pt_regs *regs, unsigned long addr)
{
siginfo_t info;
+ clear_siginfo(&info);
down_read(&current->mm->mmap_sem);
if (find_vma(current->mm, addr) == NULL)
info.si_code = SEGV_MAPERR;
@@ -260,7 +249,8 @@ static int __init swp_emulation_init(void)
return 0;
#ifdef CONFIG_PROC_FS
- if (!proc_create("cpu/swp_emulation", S_IRUGO, NULL, &proc_status_fops))
+ if (!proc_create_single("cpu/swp_emulation", S_IRUGO, NULL,
+ proc_status_show))
return -ENOMEM;
#endif /* CONFIG_PROC_FS */
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 5e3633c24e63..badf02ca3693 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -19,6 +19,7 @@
#include <linux/uaccess.h>
#include <linux/hardirq.h>
#include <linux/kdebug.h>
+#include <linux/kprobes.h>
#include <linux/module.h>
#include <linux/kexec.h>
#include <linux/bug.h>
@@ -417,7 +418,8 @@ void unregister_undef_hook(struct undef_hook *hook)
raw_spin_unlock_irqrestore(&undef_lock, flags);
}
-static int call_undef_hook(struct pt_regs *regs, unsigned int instr)
+static nokprobe_inline
+int call_undef_hook(struct pt_regs *regs, unsigned int instr)
{
struct undef_hook *hook;
unsigned long flags;
@@ -439,6 +441,7 @@ asmlinkage void do_undefinstr(struct pt_regs *regs)
siginfo_t info;
void __user *pc;
+ clear_siginfo(&info);
pc = (void __user *)instruction_pointer(regs);
if (processor_mode(regs) == SVC_MODE) {
@@ -490,6 +493,7 @@ die_sig:
arm_notify_die("Oops - undefined instruction", regs, &info, 0, 6);
}
+NOKPROBE_SYMBOL(do_undefinstr)
/*
* Handle FIQ similarly to NMI on x86 systems.
@@ -537,6 +541,7 @@ static int bad_syscall(int n, struct pt_regs *regs)
{
siginfo_t info;
+ clear_siginfo(&info);
if ((current->personality & PER_MASK) != PER_LINUX) {
send_sig(SIGSEGV, current, 1);
return regs->ARM_r0;
@@ -604,6 +609,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
{
siginfo_t info;
+ clear_siginfo(&info);
if ((no >> 16) != (__ARM_NR_BASE>> 16))
return bad_syscall(no, regs);
@@ -740,6 +746,8 @@ baddataabort(int code, unsigned long instr, struct pt_regs *regs)
unsigned long addr = instruction_pointer(regs);
siginfo_t info;
+ clear_siginfo(&info);
+
#ifdef CONFIG_DEBUG_USER
if (user_debug & UDBG_BADABORT) {
pr_err("[%d] %s: bad data abort: code %d instr 0x%08lx\n",
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