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Diffstat (limited to 'arch/arm/kernel/process.c')
-rw-r--r--arch/arm/kernel/process.c25
1 files changed, 12 insertions, 13 deletions
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 26eacd3e5de..8f146a4b475 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -256,8 +256,6 @@ static unsigned long *thread_info_head;
static unsigned int nr_thread_info;
#define EXTRA_TASK_STRUCT 4
-#define ll_alloc_task_struct() ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
-#define ll_free_task_struct(p) free_pages((unsigned long)(p),1)
struct thread_info *alloc_thread_info(struct task_struct *task)
{
@@ -274,17 +272,16 @@ struct thread_info *alloc_thread_info(struct task_struct *task)
}
if (!thread)
- thread = ll_alloc_task_struct();
+ thread = (struct thread_info *)
+ __get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER);
-#ifdef CONFIG_MAGIC_SYSRQ
+#ifdef CONFIG_DEBUG_STACK_USAGE
/*
* The stack must be cleared if you want SYSRQ-T to
* give sensible stack usage information
*/
- if (thread) {
- char *p = (char *)thread;
- memzero(p+KERNEL_STACK_SIZE, KERNEL_STACK_SIZE);
- }
+ if (thread)
+ memzero(thread, THREAD_SIZE);
#endif
return thread;
}
@@ -297,7 +294,7 @@ void free_thread_info(struct thread_info *thread)
thread_info_head = p;
nr_thread_info += 1;
} else
- ll_free_task_struct(thread);
+ free_pages((unsigned long)thread, THREAD_SIZE_ORDER);
}
/*
@@ -350,7 +347,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long stack_start,
struct thread_info *thread = p->thread_info;
struct pt_regs *childregs;
- childregs = ((struct pt_regs *)((unsigned long)thread + THREAD_SIZE - 8)) - 1;
+ childregs = ((struct pt_regs *)((unsigned long)thread + THREAD_START_SP)) - 1;
*childregs = *regs;
childregs->ARM_r0 = 0;
childregs->ARM_sp = stack_start;
@@ -447,15 +444,17 @@ EXPORT_SYMBOL(kernel_thread);
unsigned long get_wchan(struct task_struct *p)
{
unsigned long fp, lr;
- unsigned long stack_page;
+ unsigned long stack_start, stack_end;
int count = 0;
if (!p || p == current || p->state == TASK_RUNNING)
return 0;
- stack_page = 4096 + (unsigned long)p->thread_info;
+ stack_start = (unsigned long)(p->thread_info + 1);
+ stack_end = ((unsigned long)p->thread_info) + THREAD_SIZE;
+
fp = thread_saved_fp(p);
do {
- if (fp < stack_page || fp > 4092+stack_page)
+ if (fp < stack_start || fp > stack_end)
return 0;
lr = pc_pointer (((unsigned long *)fp)[-1]);
if (!in_sched_functions(lr))