sparc64: Implement IRQ stacks.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index 7f5debd..15f4178 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -52,6 +52,8 @@
#include <asm/irq_regs.h>
#include <asm/smp.h>
+#include "kstack.h"
+
static void sparc64_yield(int cpu)
{
if (tlb_type != hypervisor)
@@ -235,19 +237,6 @@
struct global_reg_snapshot global_reg_snapshot[NR_CPUS];
static DEFINE_SPINLOCK(global_reg_snapshot_lock);
-static bool kstack_valid(struct thread_info *tp, struct reg_window *rw)
-{
- unsigned long thread_base, fp;
-
- thread_base = (unsigned long) tp;
- fp = (unsigned long) rw;
-
- if (fp < (thread_base + sizeof(struct thread_info)) ||
- fp >= (thread_base + THREAD_SIZE))
- return false;
- return true;
-}
-
static void __global_reg_self(struct thread_info *tp, struct pt_regs *regs,
int this_cpu)
{
@@ -264,11 +253,11 @@
rw = (struct reg_window *)
(regs->u_regs[UREG_FP] + STACK_BIAS);
- if (kstack_valid(tp, rw)) {
+ if (kstack_valid(tp, (unsigned long) rw)) {
global_reg_snapshot[this_cpu].i7 = rw->ins[7];
rw = (struct reg_window *)
(rw->ins[6] + STACK_BIAS);
- if (kstack_valid(tp, rw))
+ if (kstack_valid(tp, (unsigned long) rw))
global_reg_snapshot[this_cpu].rpc = rw->ins[7];
}
} else {
@@ -828,7 +817,7 @@
unsigned long get_wchan(struct task_struct *task)
{
unsigned long pc, fp, bias = 0;
- unsigned long thread_info_base;
+ struct thread_info *tp;
struct reg_window *rw;
unsigned long ret = 0;
int count = 0;
@@ -837,14 +826,12 @@
task->state == TASK_RUNNING)
goto out;
- thread_info_base = (unsigned long) task_stack_page(task);
+ tp = task_thread_info(task);
bias = STACK_BIAS;
fp = task_thread_info(task)->ksp + bias;
do {
- /* Bogus frame pointer? */
- if (fp < (thread_info_base + sizeof(struct thread_info)) ||
- fp >= (thread_info_base + THREAD_SIZE))
+ if (!kstack_valid(tp, fp))
break;
rw = (struct reg_window *) fp;
pc = rw->ins[7];