1 files changed, 4 insertions, 32 deletions

diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c
index 10f7bb9fc140..9da57f032983 100644
--- a/arch/sparc/kernel/traps_64.c
+++ b/arch/sparc/kernel/traps_64.c
@@ -17,6 +17,7 @@
 #include <linux/mm.h>
 #include <linux/init.h>
 #include <linux/kdebug.h>
+#include <linux/gfp.h>
 
 #include <asm/smp.h>
 #include <asm/delay.h>
@@ -2202,27 +2203,6 @@ void dump_stack(void)
 
 EXPORT_SYMBOL(dump_stack);
 
-static inline int is_kernel_stack(struct task_struct *task,
-                                  struct reg_window *rw)
-{
-        unsigned long rw_addr = (unsigned long) rw;
-        unsigned long thread_base, thread_end;
-
-        if (rw_addr < PAGE_OFFSET) {
-                if (task != &init_task)
-                        return 0;
-        }
-
-        thread_base = (unsigned long) task_stack_page(task);
-        thread_end = thread_base + sizeof(union thread_union);
-        if (rw_addr >= thread_base &&
-            rw_addr < thread_end &&
-            !(rw_addr & 0x7UL))
-                return 1;
-
-        return 0;
-}
-
 static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
 {
         unsigned long fp = rw->ins[6];
@@ -2251,6 +2231,7 @@ void die_if_kernel(char *str, struct pt_regs *regs)
         show_regs(regs);
         add_taint(TAINT_DIE);
         if (regs->tstate & TSTATE_PRIV) {
+                struct thread_info *tp = current_thread_info();
                 struct reg_window *rw = (struct reg_window *)
                         (regs->u_regs[UREG_FP] + STACK_BIAS);
 
@@ -2258,8 +2239,8 @@ void die_if_kernel(char *str, struct pt_regs *regs)
                  * find some badly aligned kernel stack.
                  */
                 while (rw &&
-                       count++ < 30&&
-                       is_kernel_stack(current, rw)) {
+                       count++ < 30 &&
+                       kstack_valid(tp, (unsigned long) rw)) {
                         printk("Caller[%016lx]: %pS\n", rw->ins[7],
                                (void *) rw->ins[7]);
 
@@ -2548,15 +2529,6 @@ void __init trap_init(void)
                                                rwbuf_stkptrs) ||
                      TI_GSR != offsetof(struct thread_info, gsr) ||
                      TI_XFSR != offsetof(struct thread_info, xfsr) ||
-                     TI_USER_CNTD0 != offsetof(struct thread_info,
-                                               user_cntd0) ||
-                     TI_USER_CNTD1 != offsetof(struct thread_info,
-                                               user_cntd1) ||
-                     TI_KERN_CNTD0 != offsetof(struct thread_info,
-                                               kernel_cntd0) ||
-                     TI_KERN_CNTD1 != offsetof(struct thread_info,
-                                               kernel_cntd1) ||
-                     TI_PCR != offsetof(struct thread_info, pcr_reg) ||
                      TI_PRE_COUNT != offsetof(struct thread_info,
                                               preempt_count) ||
                      TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||