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Diffstat (limited to 'arch/arm/kernel/process.c')
-rw-r--r--arch/arm/kernel/process.c33
1 files changed, 16 insertions, 17 deletions
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index d3ea6fa8952..c3265a2e7cd 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -34,6 +34,7 @@
#include <asm/processor.h>
#include <asm/system.h>
#include <asm/thread_notify.h>
+#include <asm/stacktrace.h>
#include <asm/mach/time.h>
static const char *processor_modes[] = {
@@ -82,7 +83,7 @@ static int __init hlt_setup(char *__unused)
__setup("nohlt", nohlt_setup);
__setup("hlt", hlt_setup);
-void arm_machine_restart(char mode)
+void arm_machine_restart(char mode, const char *cmd)
{
/*
* Clean and disable cache, and turn off interrupts
@@ -99,7 +100,7 @@ void arm_machine_restart(char mode)
/*
* Now call the architecture specific reboot code.
*/
- arch_reset(mode);
+ arch_reset(mode, cmd);
/*
* Whoops - the architecture was unable to reboot.
@@ -119,7 +120,7 @@ EXPORT_SYMBOL(pm_idle);
void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);
-void (*arm_pm_restart)(char str) = arm_machine_restart;
+void (*arm_pm_restart)(char str, const char *cmd) = arm_machine_restart;
EXPORT_SYMBOL_GPL(arm_pm_restart);
@@ -194,9 +195,9 @@ void machine_power_off(void)
pm_power_off();
}
-void machine_restart(char * __unused)
+void machine_restart(char *cmd)
{
- arm_pm_restart(reboot_mode);
+ arm_pm_restart(reboot_mode, cmd);
}
void __show_regs(struct pt_regs *regs)
@@ -300,7 +301,7 @@ void release_thread(struct task_struct *dead_task)
asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
int
-copy_thread(int nr, unsigned long clone_flags, unsigned long stack_start,
+copy_thread(unsigned long clone_flags, unsigned long stack_start,
unsigned long stk_sz, struct task_struct *p, struct pt_regs *regs)
{
struct thread_info *thread = task_thread_info(p);
@@ -372,23 +373,21 @@ EXPORT_SYMBOL(kernel_thread);
unsigned long get_wchan(struct task_struct *p)
{
- unsigned long fp, lr;
- unsigned long stack_start, stack_end;
+ struct stackframe frame;
int count = 0;
if (!p || p == current || p->state == TASK_RUNNING)
return 0;
- stack_start = (unsigned long)end_of_stack(p);
- stack_end = (unsigned long)task_stack_page(p) + THREAD_SIZE;
-
- fp = thread_saved_fp(p);
+ frame.fp = thread_saved_fp(p);
+ frame.sp = thread_saved_sp(p);
+ frame.lr = 0; /* recovered from the stack */
+ frame.pc = thread_saved_pc(p);
do {
- if (fp < stack_start || fp > stack_end)
+ int ret = unwind_frame(&frame);
+ if (ret < 0)
return 0;
- lr = ((unsigned long *)fp)[-1];
- if (!in_sched_functions(lr))
- return lr;
- fp = *(unsigned long *) (fp - 12);
+ if (!in_sched_functions(frame.pc))
+ return frame.pc;
} while (count ++ < 16);
return 0;
}