Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Prevent stack backtrace false positives on trap frames.
  sparc64: Fix stack tracing through trap frames.
  sparc64: Fix kernel thread stack termination.
  sunhv: Fix locking in non-paged I/O case.

1 files changed, 7 insertions, 5 deletions

diff --git a/arch/sparc64/kernel/stacktrace.c b/arch/sparc64/kernel/stacktrace.c
index 01b52f561af4..c73ce3f4197e 100644
--- a/arch/sparc64/kernel/stacktrace.c
+++ b/arch/sparc64/kernel/stacktrace.c
@@ -19,7 +19,7 @@ void save_stack_trace(struct stack_trace *trace)
         fp = ksp + STACK_BIAS;
         thread_base = (unsigned long) tp;
         do {
-                struct reg_window *rw;
+                struct sparc_stackf *sf;
                 struct pt_regs *regs;
                 unsigned long pc;
 
@@ -28,15 +28,17 @@ void save_stack_trace(struct stack_trace *trace)
                     fp >= (thread_base + THREAD_SIZE))
                         break;
 
-                rw = (struct reg_window *) fp;
-                regs = (struct pt_regs *) (rw + 1);
+                sf = (struct sparc_stackf *) fp;
+                regs = (struct pt_regs *) (sf + 1);
 
                 if ((regs->magic & ~0x1ff) == PT_REGS_MAGIC) {
+                        if (!(regs->tstate & TSTATE_PRIV))
+                                break;
                         pc = regs->tpc;
                         fp = regs->u_regs[UREG_I6] + STACK_BIAS;
                 } else {
-                        pc = rw->ins[7];
-                        fp = rw->ins[6] + STACK_BIAS;
+                        pc = sf->callers_pc;
+                        fp = (unsigned long)sf->fp + STACK_BIAS;
                 }
 
                 if (trace->skip > 0)